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User Manual

Type KITZ 201Multi-port Interface Unit

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User ManualType KITZ 201

Multi-port Interface Unit

HANDLING OF ELECTRONIC EQUIPMENT

A person's normal movements can easily generate electrostatic potentials of several thousand volts.

Discharge of these voltages into semiconductor devices when handling electronic circuits can cause serious

damage, which often may not be immediately apparent but the reliability of the circuit will have been

reduced.

The electronic circuits of ALSTOM T&D Protection & Control Limited products are immune to the relevant levels

of electrostatic discharge when housed in their cases. Do not expose them to the risk of damage by

withdrawing modules unnecessarily.

Each module incorporates the highest practicable protection for its semiconductor devices. However, if it

becomes necessary to withdraw a module, the following precautions should be taken to preserve the high

reliability and long life for which the equipment has been designed and manufactured.

1. Before removing a module, ensure that you are at the same electrostatic potential as the equipment by

touching the case.

2. Handle the module by its front-plate, frame, or edges of the printed circuit board.

Avoid touching the electronic components, printed circuit track or connectors.

3. Do not pass the module to any person without first ensuring that you are both at the same electrostatic

potential. Shaking hands achieves equipotential.

4. Place the module on an antistatic surface, or on a conducting surface which is at the same

potential as yourself.

5. Store or transport the module in a conductive bag.

More information on safe working procedures for all electronic equipment can be found in BS5783 and

IEC 60147-0F.

If you are making measurements on the internal electronic circuitry of an equipment in service, it is preferablethat you are earthed to the case with a conductive wrist strap.

Wrist straps should have a resistance to ground between 500k 10M ohms. If a wrist strap is not available,

you should maintain regular contact with the case to prevent the build up of static. Instrumentation which may

be used for making measurements should be earthed to the case whenever possible.

ALSTOM T&D Protection & Control Limited strongly recommends that detailed investigations on the electronic

circuitry, or modification work, should be carried out in a Special Handling Area such as described in

BS5783 or IEC 60147-0F.

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Contents

SAFETY SECTION 8

1. INTRODUCTION 12

2. HANDLING AND INSTALLATION 122.1 Receipt of KITZ 201 units 122.2 Electrostatic discharge (ESD) 12

2.3 Mounting 132.4 Unpacking 132.5 Storage 132.6 Initial set-up: setting the communication address 143. FEATURES 15

4. CONNECTION 154.1 Connection 154.1.1 K-Bus Connection 174.1.2 Rear RS232 (IEC 60870) connection 184.1.3 Front RS232 (IEC 60870) connection 21

5. ALARMS AND INDICATIONS 245.1 Communication indications operation 245.2 Unit healthy LED 245.3 Unit alarm LED 245.3.1 Indication alarm function links (IND Alm Fn Links) 245.4 Alarm records 255.5 Testing LED indication operation 255.6 Watchdog contact operation 255.7 Events 255.7.1 KITZ 201 events 25

6. OPERATION 266.1 General 266.2 General notes on port timer settings 266.3 Communication port configuration 266.4 Courier address recognition 276.4.1 Address range 276.4.2 Unit address recognition 276.5 Communication port received message interleave 286.5.1 Reset remote link 286.5.2 Poll status and poll buffer 28

6.5.3 Master Port (0, 1 and 2) request message processing 286.5.4 Busy replies from the KITZ 201 296.5.5 Communication between KITZ 201 and downstream units 306.5.6 Retries to the downstream units 316.5.7 Block messages transfers 316.5.8 Setting changes 326.5.9 Changes to KITZ 201 unit settings 336.5.10 Global requests 336.5.11 Multiple transactions 346.5.12 Communication port priority 366.5.13 Event/Alarm blocking 37

6.6 Real time clock (RTC) time and date setting 386.6.1 IEC 60870 time and date codes 386.6.2 Time tagging of master reply messages 386.7 Foreign data transmission 39

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6.7.1 Foreign data transmission and termination 396.7.2 Foreign data reply time 396.7.3 Reset remote link response time 396.7.4 Foreign data interleaving 396.7.5 KITZ 201 settings for foreign data transmission 396.8 Intermittent polling 407. IRIG-B CLOCK SYNCHRONISATION 40

8. USER INTERFACE 41

8.1 Introduction 418.2 Courier database 428.2.1 General features of a Courier database 428.2.2 KITZ 201 database 428.3 Courier password 438.4 Remote access password protection 438.5 Extended password protection 448.6 Data cells 448.7 Event extraction 448.8 Use of modems 44

8.8.1 Selection of modem 448.8.2 Connection to modem 458.9 Invalid settings 459. TECHNICAL DATA 469.1 Ratings auxiliary supply 469.2 Burden auxiliary supply 469.3 Accuracy 469.3.1 Real time clock 469.4 Contact 469.5 Operation indications 46

9.6 Communication ports 469.6 .1 K-Bus Ports 1, 2 and 3 469.6.2 IEC 60870 (RS232) Ports 1 and 2 479.6.3 IEC 60870 (RS232) Ports 0 489.6.4 IEC 60870 (Fibre optic) Port 1 489.6.5 IRIG-B - Baby-N-Connection (BNC) Port 489.7 High voltage withstand 499.8 Electrical environment 509.9 EMC tests 519.10 Atmospheric environment 519.11 Mechanical environment 529.11.1 Vibration 529.11.2 Shock and bump 529.11.3 Seismic 529.12 Model number 529.13 User tests 5210. COMMISSIONING, PROBLEM SOLVING AND MAINTENANCE 5310.1 General 5310.2 Commissioning instructions 5310.2.1 Commissioning preliminaries 5310.2.2 Auxiliary supply tests 5410.2.3 Configuration 5410.2.4 Testing communication port operation 5510.3 Problem solving guide 5510.3.1 All indications are off 55

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10.3.2 Green supply indication is off and alarm indication is on 5510.3.3 No communications 5610.3.4 Slow communications response (many retries) 5610.3.5 Communication not operational via a modem 5710.3.6 Cannot access the KITZ 201 Courier database. 5710.3.7 Cannot access one or more of the downstream units within

the specified address range 5710.3.8 Master station time out 57

10.3.9 Connected Courier downstream relay communications is slowwhen communicating via the KITZ 201. 5710.4 Maintenance 5710.4.1 Battery replacement 5711. COURIER DATABASE 5911.1 System data 5911.1.1 Language 5911.1.2 Password 5911.1.3 Description 5911.1.4 Plant reference 59

11.1.5 Model number 6011.1.6 Serial number 6011.1.7 Communications level 6011.1.8 Unit address 6011.1.9 Software reference 6011.1.10 Alarms 6011.2 Unit settings 6011.2.1 Extended password protection 6011.2.2 Menu access 6011.2.3 Password timer 6011.2.4 Serial Port 1 enable 6111.2.5 Serial Port 2 enable 6111.3 Port 0 settings 6111.3.1 Port 0 priority 6111.3.2 Port 0 setting timer 6111.3.3 Port 0 block timer 6111.3.4 Port 0 reply timer 6111.4 Port 1 settings 6211.4.1 Port 1 priority 6311.4.2 Port 1 mode 6311.4.3 Port 1 data rate 63

11.4.4 Port 1 frame format 6311.4.5 Port 1 setting timer 6311.4.6 Port 1 block timer 6411.4.7 Port 1 reply timer 6411.4.8 Port 1 reset timer 6411.4.9 Port 1 add time tag 6411.4.10 Port 1 modem 6411.4.11 Port 1 password enable 6411.4.12 Port 1 password entry 6411.4.13 Port 1 password setting change 64

11.4.14 Port 1 password timer 6511.4.15 Port 1 block events 6511.5 Port 2 settings 6511.5.1 Port 2 priority 6611.5.2 Port 2 mode 66

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11.5.3 Port 2 data rate 6611.5.4 Port 2 frame format 6611.5.5 Port 2 setting timer 6611.5.6 Port 2 block timer 6611.5.7 Port 2 reply timer 6611.5.8 Port 2 reset timer 6711.5.9 Port 2 add time tag 6711.5.10 Port 2 modem 67

11.5.11 Port 2 password enable 6711.5.12 Port 2 password entry 6711.5.13 Port 2 password setting change 6711.5.14 Port 2 password timer 6711.5.15 Port 2 block events 6711.6 Port 3 settings 6811.6.1 Port 3 reply timer 6811.6.2 Port 3 retries 6811.6.3 Port 3 busy replies 6811.6.4 Port 3 global message transmission timer 6811.6.5 Port 3 message transmission delay times 6911.6.6 Port 3 foreign data reply timer 6911.6.7 Port 3 Intermittent Polling 6911.6.8 Port 3 polling time 6911.6.9 Port 3 polling status 6911.7 Indications 7011.7.1 Indication alarm function links 7011.7.2 Illuminate indications on power-up test 7011.7.3 Indications test illumination time 7011.7.4 Illuminate indications test 7011.8 Real time clock 70

11.8.1 Date and time 7111.8.2 RTC IRIG-B enable 7111.8.3 RTC IRIG-B local time offset 7111.8.4 RTC alarm time 7111.8.5 RTC IRIG-B year 7111.9 Communications statistics 7111.9.1 Reset communication total message statistics 7111.9.2 Reset communication total message error statistics 7211.9.3 Port 0 communication total messages received 7211.9.4 Port 0 communication total error messages received 72

11.9.5 Port 1 communication total messages received 7211.9.6 Port 1 communication total error messages received 7211.9.7 Port 2 communication total messages received 7211.9.8 Port 2 communication total error messages received 7211.9.9 Port 3 communication total messages received 7211.9.10 Port 3 communication total error messages received 7211.10 Address range 7311.10.1 Base address 7311.10.2 Number of downstream units 7312. APPLICATION 73

12.1 SCADA 7312.2 Simultaneous communication 7412.3 K-Bus networks 7412.4 Single master stations 7612.5 IRIG-B 76

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SAFETY SECTION

This Safety Section should be read before commencing any workon the equipment.

Health and safety

The information in the Safety Section of the product documentation is intended to

ensure that products are properly installed and handled in order to maintainthem in a safe condition. It is assumed that everyone who will be associated withthe equipment will be familiar with the contents of the Safety Section.

Explanation of symbols and labels

The meaning of symbols and labels which may be used on the equipment or inthe product documentation, is given below.

Caution:refer to product documentation Caution:risk of electric shock

Protective/safety *earth terminal

Functional *earth terminal.Note: this symbol may also be used for a protective/

safety earth terminal if that terminal is part of aterminal block or sub-assembly eg. power supply.

*Note:The term earth used throughout this manual is the direct equivalent ofthe North American term ground.

Installing, Commissioning and Servicing

Equipment connections

Personnel undertaking installation, commissioning or servicing work on thisequipment should be aware of the correct working procedures to ensure safety.The product documentation should be consulted before installing, commissioningor servicing the equipment.

Terminals exposed during installation, commissioning and maintenance maypresent a hazardous voltage unless the equipment is electrically isolated.

If there is unlocked access to the rear of the equipment, care should be taken byall personnel to avoid electric shock or energy hazards.

Voltage and current connections should be made using insulated crimpterminations to ensure that terminal block insulation requirements are maintainedfor safety. To ensure that wires are correctly terminated, the correct crimpterminal and tool for the wire size should be used.

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Before energising the equipment it must be earthed using the protective earthterminal, or the appropriate termination of the supply plug in the case of plugconnected equipment. Omitting or disconnecting the equipment earth may causea safety hazard.

The recommended minimum earth wire size is 2.5 mm2, unless otherwise statedin the technical data section of the Service Manual.

Before energising the equipment, the following should be checked:Voltage rating and polarity;

CT circuit rating and integrity of connections;

Protective fuse rating;

Integrity of earth connection (where applicable)

Equipment operating conditions

The equipment should be operated within the specified electrical andenvironmental limits.

Current transformer circuits

Do not open the secondary circuit of a live CT since the high voltage producedmay be lethal to personnel and could damage insulation.

External resistors

Where external resistors are fitted to relays, these may present a risk of electricshock or burns, if touched.

Battery replacement

Where internal batteries are fitted they should be replaced with therecommended type and be installed with the correct polarity, to avoid possibledamage to the equipment.

Insulation and dielectric strength testing

Insulation testing may leave capacitors charged up to a hazardous voltage.At the end of each part of the test, the voltage should be gradually reduced tozero, to discharge capacitors, before the test leads are disconnected.

Insertion of modules and pcb cards

These must not be inserted into or withdrawn from equipment whilst it isenergised, since this may result in damage.

Fibre optic communication

Where fibre optic communication devices are fitted, these should not be vieweddirectly. Optical power meters should be used to determine the operation orsignal level of the device.

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Older products

Electrical adjustments

Equipments which require direct physical adjustments to their operatingmechanism to change current or voltage settings, should have the electricalpower removed before making the change, to avoid any risk of electric shock.

Mechanical adjustments

The electrical power to the relay contacts should be removed before checkingany mechanical settings, to avoid any risk of electric shock.

Draw out case relays

Removal of the cover on equipment incorporating electromechanical operatingelements, may expose hazardous live parts such as relay contacts.

Insertion and withdrawal of extender cards

When using an extender card, this should not be inserted or withdrawn from the

equipment whilst it is energised. This is to avoid possible shock or damagehazards. Hazardous live voltages may be accessible on the extender card.

Insertion and withdrawal of heavy current test plugs

When using a heavy current test plug, CT shorting links must be in place beforeinsertion or removal, to avoid potentially lethal voltages.

Decommissioning and Disposal

Decommissioning: The auxiliary supply circuit in the relay may includecapacitors across the supply or to earth. To avoid electricshock or energy hazards, after completely isolating thesupplies to the relay (both poles of any dc supply), thecapacitors should be safely discharged via the externalterminals prior to decommissioning.

Disposal: It is recommended that incineration and disposal to watercourses is avoided. The product should be disposed of in

a safe manner. Any products containing batteries shouldhave them removed before disposal, taking precautions toavoid short circuits. Particular regulations within thecountry of operation, may apply to the disposal of lithiumbatteries.

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Technical Specifications

Protective fuse rating

The recommended maximum rating of the external protective fuse for thisequipment is 16A, Red Spot type or equivalent, unless otherwise stated in thetechnical data section of the product documentation.

Insulation class: IEC 61010-1: 1990/A2: 1995 This equipment requires aClass I protective (safety) earthEN 61010-1: 1993/A2: 1995 connection to ensure userClass I safety.

Installation IEC 61010-1: 1990/A2: 1995 Distribution level, fixedCategory Category III installation. Equipment in(Overvoltage): EN 61010-1: 1993/A2: 1995 this category is qualification

Category III tested at 5kV peak,1.2/50s, 500, 0.5J,

between all supply circuitsand earth and also betweenindependent circuits.

Environment: IEC 61010-1: 1990/A2: 1995 Compliance isPollution degree 2 demonstrated by referenceEN 61010-1: 1993/A2: 1995 to generic safety standards.Pollution degree 2

Product safety: 73/23/EEC Compliance with theEuropean CommissionLow Voltage Directive.

EN 61010-1: 1993/A2: 1995 Compliance isEN 60950: 1992/A11:1997 demonstrated by reference

to generic safety standards.

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Section 1. INTRODUCTION

This document details the KITZ 201 interface unit. It describes the operation andfeatures of the unit in sufficient detail to allow users to interface the unit to otherequipment.

The KITZ 201 will provide an interface between devices supporting K-Bus Couriercommunications, two Courier based master stations and a local (Courier)service/maintenance terminal.

The KITZ 201 will allow simultaneous communications to be performed betweentwo Courier master stations or higher order supervisory systems and theconnected K-Bus communication devices (eg. spur of relays).

A front RS232 port allows a third Courier master station to gain local access tothe connected K-Bus communication devices.

Operation is achieved by interleaving the request messages and associated

replies to and from each Courier device.The unit performs conversion between the K-Bus HDLC data format and theRS232 IEC 60870-5 FT.1.2 data format. The unit is transparent to the equipmentattached to each master station port.

Modem support is provided on the RS232 master ports. A second version of theKITZ 201 replaces one of the RS232 master station ports with an optical fibremaster station port.

An IRIG-B connection is provided for external time synchronisation. A real time

clock (RTC) maintains the time if the IRIG-B synchronisation is removed or the unitis de-energised.

Section 2. HANDLING and INSTALLATION

The user should be familiar with the contents of the Safety Sectionbefore commencing work on this equipment.

2.1 Receipt of KITZ 201 units

Although the KITZ 201 interface unit is of the standard Midos case typeconstruction, it requires careful handling prior to use on site. Upon receipt, theunit should be examined immediately, to ensure that no damage has beensustained in transit.

If damage has been sustained during transit, a claim should be made to thetransport contractor and a representative of ALSTOM T&D Protection & Controlshould be promptly notified.

2.2 Electrostatic discharge (ESD)

The KITZ 201 interface unit uses components that are sensitive to electrostaticdischarges. The electronic circuits are well protected by the metal case and theinternal components should not be exposed by the removal of the assembledboards from within the outer casing.

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It should be noted that there are no user setting adjustments or measurements tobe carried out within the unit.

A persons normal movements can easily generate electrostatic potentials ofseveral thousand volts. Discharge of these voltages into semiconductor deviceswhen handling electronic circuits can cause serious damage. Often, this is notimmediately apparent, but the units reliability will have been impaired.

When transporting the unit, care should be taken that the RS232 ports are notsubjected to ESD. Touching the case will ensure that the user is at the sameelectrostatic potential as the unit.

More information on safe working procedures for all electronic equipment can befound in BS 5783 and IEC 60147-OF. It is strongly recommended that detailedinvestigations on the electronic circuitry or any modification work should becarried out in a Special Handling Area such as described in the above-mentioned BS and IEC documents.

2.3 MountingKITZ 201 units are dispatched either individually or as part of a panel/rackassembly. If loose devices are to be assembled into a scheme, then constructiondetails can be found in Publication R7012.

Modules should remain protected by their metal case during assembly into apanel or rack. The design of the unit is such that fixing holes are accessiblewithout removal of the cover. For individually mounted devices, an outlinediagram is normally supplied showing the panel cut-out and hole centres.These dimensions will also be found in Figure 1.

2.4 Unpacking

Care should be taken when unpacking and installing the unit to prevent damage.

2.5 Storage

If the KITZ 201 interface unit is not to be installed immediately upon receipt, itshould be stored in an environment free from dust and moisture in the originalcarton.

Where de-humidifier bags have been included in the packing, they should beretained.

The action of the de-humidifier crystals will be impaired if the bag has beenexposed to ambient conditions and may be restored by heating the bag gentlyfor about half an hour, prior to replacing it in the carton.

Dust which collects on a carton may, on subsequent unpacking, find its way intothe unit. In damp conditions, the carton and packing may become impregnatedwith moisture and the de-humidifier will lose its efficiency.

Storage temperature: 25C to +70C.

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2.6 Initial set-up: setting the communication address

The communication address of the unit will be set to 255 when it leaves thefactory. This is the global address of all K-Bus slave units on the network andrequires changing to a unique address in order to function as a slave device onK-Bus. This is accomplished using the Courier Access Software package or theProtection Access Software & Toolkit. For details of how to change thecommunication address of the unit, refer to the section "Establishing NetworkCommunication" from either of the above-mentioned manuals. Note that it will benecessary to enter the serial number of the unit as part of the installation process.

Figure 1: Case outlines size 4

97

177

Push buttonprojection 10 max.

32 21225 min.

157 max.

11103

99

52

23.54 holes 4.4

168 159

Panel cut-out:Flush mounting fixing details.

All dimensions in mm.

Flush mounting.

Reset

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Section 3. FEATURES

The main features of the KITZ 201 are as follows:

Midos style case size 4

Extremely wide range auxiliary supply inputs

External time synchronisation to IRIG-B

Simultaneous dual Courier Master and local connection gateway to a singleK-Bus spur of relays

LED indication of communication exchanges

Fully isolated RS232 communication channels

Optional Fibre optic/RS232 communication channels

Local/remote user configurability

Internal real time clock

Section 4. CONNECTION

4.1 Connection

Connection diagrams for the KITZ 201 are shown in the following figures:

Figure 2: Connection diagram for KITZ 201(RS232 version)

IRIG-B(50 Ohm BNC socket)

(Master)RS232 Rear Port 2

IRIG B

5 Signal ground

7 RTS8 CTS

6 DSR

1 DCD

3 TX4 DTR

2 RX

+

3

5 Signal ground

3 TX4 DTR

6 DSR7 RTS8 CTS

2 RX1 DCD

5

27

25

23

21

19

TX 3 / 2RX 2 / 3

5

(Downstream Port)K-BUS Port 3

Screen

Screen

K-BUS

K-BUS

K-BUS

15

11

9

(Master)K-BUS Port 2

(MasterK-BUS Port 1

Case earth

K-BUS

K-BUS

Screen

17

13

K-BUS

1

Watchdog

7

RS232 Front Port(9 way female 'D'connector)

AC / DCauxiliarysupply VX

(Master)RS232 Rear Port 1(9 way female 'D'connector)

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Figure 3: Connection diagram for KITZ 201 (Optical Fibre version)

The unit's front panel is shown in the Figure 4.

The unit consists of four communications ports.Port 0 (RS232 Front Port) is an RS232 (IEC 60870) connection which is designedfor temporary access and is located on the front of the unit. A switch is designedfor crossing over the transmit and receive signals.

In Figure 2, Port 1 and Port 2 can be individually configured as RS232 ports(RS232 Rear Port 1 and 2) or K-Bus ports (K-Bus Port 1 and 2). Only one of theseconfigurations is active at any one time. For details of configuration seeP1 Mode setting in section 11.4 and P2 Mode in section 11.5.

In Figure, 3 Port 1 can be configured as an Optical Fibre port (Optical FibrePort) or a K-Bus port (K-Bus Port 1). Only one of these configurations is active atany one time. For details of configuration see P1 Mode setting in section 11.4.Port 2 can be configured as an RS232 port (RS232 Rear Port) or a K-Bus port(K-Bus Port 2). Only one of these configurations is active at any one time.For details of configuration see P2 Mode in section 11.5.

Port 3 (K-Bus Port 3) is for the connection of relays and is permanently configuredfor K-Bus.

1

27

IRIG-B(50 Ohm BNC socket)

5 Signal ground

(Master)RS232 Rear Port(9 way female 'D'connector) 6 DSR

8 CTS7 RTS

4 DTR3 TX2 RX1 DCD

RX 2/35

TX 3/2

Rx

Tx

(Master)Optical fibre

port

IRIG B

Rx

Tx

AC/DCauxiliarysupply VX -

+3

5

(Downstream)K-BUS Port 3

ScreenK-BUS

Screen

K-BUS

21

23

25

(Master)K-BUS Port 2

(Master)

K-BUS Port 1Screen15

K-BUS

K-BUS

17

19

Case earth

K-BUS

K-BUS

11

13

Watchdog9

7

RS232 Front Port(9 way female 'D'connector)

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Figure 4: KITZ 201 Front panel layout

4.1.1 K-Bus Connection

K-Bus requires a twisted pair screened cable with resistive termination on theextreme ends.

4.1.1.1 Connection Method

K-Bus is a multi-drop standard. This means that a K-Bus connection can be madepoint to point or can be daisy-chained together with a number of other products.A chain of connected units is known as a spur and no branches may be madefrom the spur.

4.1.1.2 Recommended Cable

Twisted pair with outer screen, to DEF STANDARD 61-12-5 16 strand, 0.2mm

diameter, 40mW per meter per core, 171pF per metre (core to core), 288pF permetre (core to screen).

4.1.1.3 Cable Termination

Termination is via three terminals on a standard Midos terminal block.Two terminals are for the twisted pair communications wires and the third is forthe screen. The screen connection is not internally connected to the unit in anyway, since the screen should be earthed at one point of the cable only, normallyat the master end. The transmission wires should be terminated, using a 150W

resistor at both extreme ends of the cable. The Midos block terminal numbers, forconnection of the three K-Bus ports are given in the following table :

Metal casefixing point

Plastic screw forsecuring cover

sw1

LED

RS232

Handle

KITZ 201

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Port 1 Port 2 Port3 Connection

11 17 23 K-Bus 1

13 19 25 K-Bus 2

15 21 27 Screen (NC)

Table 1: K-Bus Connections.

4.1.1.4 Cable polarity

Polarisation is not necessary for the twisted pair.

4.1.1.5 Maximum cable length

The maximum cable length for a spur is 1000m.

4.1.1.6 Maximum devices per Spur

The maximum number of devices per spur is 32.

4.1.2 Rear RS232 (IEC 60870) connection

4.1.2.1 Connection method

The rear RS232 ports are suitable for direct point to point connection betweenthe unit and either a PC or modem. The rear ports are isolated and are designedfor permanent connection; modem control signals are also provided.

The pin outs of the rear ports on the unit are configured as Data TerminalEquipment (DTE) the connections are listed in Table 2.

Pin Number Function Direction

SHELL Protective ground

1 Data carrier detect DCD In

2 Received data RxD In

3 Transmitted data TxD Out

4 Data terminal ready DTR Out

5 Signal ground GND

6 Data set ready DSR In

7 Request to send RTS Out

8 Clear to send CTS In

9 Not connected

Table 2: Connection for the rear mounted RS232 serial connectors

This port supports the handshaking lines required for connection to a modem.A direct connection can be used between this port and a modem since this portwill be a DCE type of connection. The direct connection is as follows:

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DSR

CTS

DCD

DTR

RTSRXD

TXD

6

5 SG

KITZ 201 - DTE

9 PIN

8

1

4

27

3

66

7 5

MODEM - DCE

5

20

8

34

25 PIN

2

8

1

4

27

3

9 PIN

6 DSR

5 SG

KITZ 201 - DTE

9 PIN

8

14

2

7

CTS

DCDDTR

RTS

RXD

3 TXD

66DSR

SG 7 5

PC - DTE

CTS

DCDDTR

RTS

RXD

5

208

3

4

TXD

25 PIN

2

8

14

2

7

3

9 PIN

Figure 5.

The following connection can be used for connection to a PC with handshakingenabled:

Figure 6.

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The following connection can be used for connection to a PC with nohandshaking:

6 DSR

5 SG

KITZ 201 - DTE

9 PIN

8

1

4

2

7

CTS

DCD

DTR

RTS

RXD

3 TXD

66DSR

SG 7 5

PC - DTE

CTS

DCD

DTR

RTS

RXD

5

20

8

3

4

TXD

25 PIN

2

8

1

4

2

7

3

9 PIN

Figure 7.

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4.1.3 Front RS232 (IEC 60870) connection

4.1.3.1 Connection method

The front port is designed only to be used for temporary connection and nomodem control signals are available.

The pin out of the front port on the unit can be configured either as a DataTerminal Equipment (DTE) or a Data Circuit Terminating Equipment (DCE) using a

crossover switch (SW1) on the front panel. The connections are listed in Table 3.

Pin number Function Direction

SHELL Protective ground

1 Not connected

2/3 Received data RxD In

3/2 Transmitted data TxD Out

4 Not connected

5 Signal ground GND

6 Not connected

7 Not connected

8 Not connected

9 Not connected

Table 3. Connection for the Front Mounted RS232 Serial Connector

Configuring this port as a DCE connection allows direct connection to a PC(25 pin connector), if configured as a DTE, lines 2 and 3 must be crossed.

If the PC requires hardware handshaking lines in order to communicate, thefollowing connection can be used with the port configured as DTE:

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Alternatively, the following connection can be used with the port configured asDCE:

6

5 SG

KITZ 201 - DTE

9 PIN

8

1

4

2

7

RXD

3 TXD

66DSR

SG 7 5

PC - DTE

CTS

DC

DTR

RTS

RXD

5

20

8

3

4

TXD

25 PIN

2

8

1

4

2

7

3

9 PIN

Figure 8.

6

5 SG

KITZ 201 - DCE

9 PIN

8

14

2

7

RXD

3 TXD

66DSR

SG 7 5

PC - DTE

CTS

DCDDTR

RTS

RXD

5

208

3

4

TXD

25 PIN

2

8

14

2

7

3

9 PIN

Figure 9.

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4.1.3.2 Earthing arrangements

The earthing arrangement of the RS232 connection is for the protective ground tobe connected to 0V via the case. This arrangement provides maximum screeningof the RS232 signals.

On the rear ports, the signal ground of RS232 connection is not connected to the0V of the unit. This ensures that no earth loop currents can flow between the

relay and other connected devices.On the front port, signal ground is connected to 0V of the unit.

4.1.3.3 Recommended cable

A standard PC serial port interface cable should be used. It is essential that thecable screen be earthed at one end to ensure adequate screening. Theconnectors should be screw locked at each end. Reference should also be madeto the PC or modem user manual for the exact connection requirements.

4.1.3.4 Cable length

The maximum recommended cable length between IEC 60870 communicationports is 15m or 2500pF total cable capacitance (this applies to data rates of upto 19200 bits per second).

4.1.3.5 Data rates

The maximum data rate available on this port is 19200 bits per second.

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Section 5. ALARMS and INDICATIONS

5.1 Communication indications operation

The operation indication of each communication port transmitter and receiver islisted in the following table:

IndicationLED name Function

P0 Rx Front communication port is receiving data

P0 Tx Front communication port is transmitting data

P1 Rx Communication port 1 is receiving data

P1 Tx Communication port 1 is transmitting data

P2 Rx Communication port 2 is receiving dataP2 Tx Communication Port 2 is transmitting data

P3 Rx Communication Port 3 is receiving data

P3 Tx Communication Port 3 is transmitting data

Table 4. KITZ 201 communication LED functions.

5.2 Unit healthy LEDThe unit healthy LED (when on) is used to indicate the following:

The auxiliary supply is present.

The unit software has been initiated.

The settings are valid.

The unit has a non default serial number.

5.3 Unit alarm LED

The alarm indication will reflect the alarm status (SYS Alarms) of the unit.These are:

Invalid settings.

Default settings loaded on initialisation, ie. the unit software has thedefault serial number.

IRIG-B synchronisation lost/regained (optional).

The alarm indication will also indicate that a valid password has been entered

via the system data menu column.5.3.1 Indication alarm function links (IND Alm Fn Links)

The IRIG-B synchronisation lost alarm will only activate the Alarm Indication if"IND Alm Fn Links" Link 0 is set to 1.

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5.4 Alarm records

The alarm flags (in the SYS Alarms menu cell) indicate the set/reset state of thealarm.

Flag 0 indicates that the IRIG-B time synchronisation has been lost: (the IRIG-Bsynchronisation input must be enabled or no alarm will be generated).

Flag 1 indicates that the settings are invalid.

Flag 2 indicates that the default serial number is being used.

An alarm condition will result in the Alarm indication being lit, the alarm bit willbe set in the returned Courier status byte and the corresponding flag will be setin the SYS Alarms menu column.

The IRIG-B synchronisation lost alarm will only activate the Alarm if "IND Alm FnLinks" Link 0 is set to 1.

5.5 Testing LED indication operation

Options are provided in the Courier database to allow the indications to beilluminated on power-up or via setting a menu cell. The indications remainilluminated for a duration which is controlled by the "IND Illum Time" setting inthe Courier database.

See Section 11 Courier Database Settings, the "INDICATIONS" menu columnfor setting information details.

5.6 Watchdog contact operation

The watchdog relay contact reflects the state of the unit healthy LED ("Open" is

equivalent alert to "On")

5.7 Events

5.7.1 KITZ 201 events

The KITZ 201 generates the following time tagged events:

Invalid settings default settings loaded.

IRIG-B time synchronisation lost.

IRIG-B time synchronisation regained.A total of 20 events can be stored in the KITZ 201 internal buffers. If the eventbuffer becomes full, the oldest event record will be overwritten by the next event.

The events are time tagged, using the real time clock and will have the form:

Year (2 digit), Month, Day, Hour, Minute, Second, Millisecond.

The event records can be accessed via Port 0, 1 or 2.

The automatic extraction of events can be blocked on specific ports (refer tosection 6.5.13).

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Section 6. OPERATION

6.1 General

The KITZ 201 will allow simultaneous communications to be performed betweeneach Courier master and the connected K-Bus communication devices and thelocal terminal and the connected relay units. This is achieved by interleaving the

request messages and associated replies to/from each connected relay unit.The term "downstream unit(s)" represents any K-Bus communication devices thatcan be connected to Port 3 of the KITZ 201.

6.2 General notes on port timer settings

A timer (eg. "P0 Setting Timer", "P1 Block Timer", "P2 Reset Timer" or "P3 ReplyTimer") applies to the port on which the data is received/transmitted. A settingchange time-out period for a setting transfer process performed on Port 1 can beset to a different value from the time-outs for Ports 0 and 2, ie. "P0 Reply Timer"

applies to messages received on Port 0, "P1 Reply Timer" applies to messagesreceived on Port 1. This is implied whenever timers are discussed within the text.

6.3 Communication port configuration

Figure 10 illustrates the intended configuration for the KITZ 201 unit.

Figure 10: KITZ 201 communication port configuration.

Communication Port 0 is intended to be used for a local or Courier Master

connection and cannot be used as a slave port for the connection of IEC 60870communications based slave devices (eg. relays).

Communication Ports 1 and 2 are for connection to Courier Master stations andcannot be used as slave ports for the connection of K-Bus or IEC 60870communications based slave devices.

A version of the KITZ 201 allows a Courier master to communicate to the unit viaan optical fibre connection (in place of the Port 1 RS232 connection).

Communication Port 3 is for connection to downstream K-Bus Courier units onlyand cannot be used as a master port.

The configuration of the port physical interface and operational protocol areselected by Port 1 Mode and Port 2 Mode respectively. Further details areprovided in Section 11.

CourierMaster 2

CourierMaster 1

KITZ 201

RS232 / K-Bus (Rear)

RS232 / K-Bus

or

Glass fibre optic / K-Bus

Local PC

(Rear)

(Front)

P2

P1

P0

P3

IRIG-B

IRIG-BTimeSource

Relay1

Relay2

Relay3

K-Bus(Rear)

Downstream K-Bus Courier devices

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6.4 Courier address recognition

6.4.1 Address range

The unit can communicate with up to 32 consecutive Courier addresses, startingat a user specified Courier base address. The base address is specified by thesetting "AR base address" and is used to define the lowest Courier address thatwill be accepted as valid. Communication with addresses 0 and the global

address (255) are allowed at all times.Master request messages with addresses that are not in the specified range willbe ignored by the KITZ 201 and will not be sent to the connected downstreamunits via communication Port 3.

The maximum number of consecutive Courier addresses (starting at the baseaddress) with which the KITZ 201 can communicate is specified by the settingAR No. of units. This setting can be used as a filter to improve efficiency (undercertain conditions) if only a limited number of units (with sequential addresses)

are required. Under normal circumstances, the connected master should notrequest information from non existent addresses via the KITZ 201, so the settingcan be set to 32 without reducing communication efficiency.

The KITZ 201 address (in the System Data menu column) operates independentlyof this setting and can be set to any address (0 to 255).The KITZ 201 unit address is set to 255 (the global address) as a defaultcondition.

6.4.2 Unit address recognition

The KITZ 201 is only intended for use in systems where all addresses are singlebyte (eg. 254, 0).

If the (single) address byte of the received message matches the KITZ 201address (in the "SYS Unit Address" menu cell), the entire message is assumed tobe for the KITZ 201. If the address does not match and is within the validaddress range (see section 6.4.1), the message is passed on to the connecteddownstream units. The KITZ 201 unit address should be different to anyconnected downstream units, otherwise the downstream unit with the same

address as the KITZ 201 will not be accessible.Global messages received by the KITZ 201 unit will be assumed to contain datafor the KITZ 201 and downstream units. These will be processed by the KITZ 201unit and will be passed on to the downstream units. If the KITZ 201 address is setto 255 (Global), then only global messages will be assumed to contain KITZ 201data (these will be passed on to the downstream units).

In order to allow entry to the unit settings, the Courier command CHANGEDEVICE ADDRESS (43h) should be used to give the unit an initial address.

If a multiple address is received eg. 254, 12, 0 and the first address bytematches the KITZ 201 address, the entire message (including the additionaladdress bytes) is assumed to be for the KITZ 201. If the KITZ 201 address doesnot match, the entire message will be passed to the connected downstream units.

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6.5 Communication port received message interleave

In order to prevent downstream unit data access contention, the frontcommunication port and rear two master communication ports (ports 0, 1 and 2respectively) perform a message interleaving protocol.

Interleaving of request/reply sequences is required in order to handle multiplemaster station accesses to downstream units. In general, if one master is

accessing one particular downstream unit, any master can access any otherconnected downstream unit and other masters will have limited access to thatdownstream unit.

6.5.1 Reset remote link

On initialisation, a master must send a "Reset remote link" request to an addressbefore communication with that address can be achieved. The KITZ 201 willeither respond with a valid acknowledge or not respond at all. The commandshould be repeated a number of times to determine if a downstream unit is

present for the requested address. If the addressed downstream unit respondswith a valid acknowledge, the address will be added to the internal poll list ofthe KITZ 201, thus enabling data extraction.

6.5.2 Poll status and poll buffer

The KITZ 201 will internally generate Poll Status and Poll Buffer commands onPort 3 to allow extraction of downstream unit data and status. This feature can beturned off by setting P3 Inter Polling = On. See section 6.8 Intermittent polling fordetails.

Master requests containing Poll Status or Poll Buffer are not passed through theKITZ 201 to the downstream units. Poll Buffer is used by the master to determineif the KITZ 201 has obtained the requested data from the addressed downstreamunit.

All non-busy message replies to master requests will contain the latest Courierstatus byte information (this information is extracted automatically via the KITZ201 internal polling).

A connected master can use Poll Status requests to determine if any Alarms or

events have been generated by the request address.No reply will be returned to a message containing Poll Status or Poll Buffercommand which is sent to an address that is not present within the KITZ 201 polllist.

Each master port (0, 1 and 2) handles all Poll Status/Poll Buffer requestsindependently of each other (eg. a busy reply on Port 1 for a specificdownstream unit address does not necessarily mean a busy reply will be returnedon Port 2 in response to a request to the same downstream unit address.

6.5.3 Master Port (0, 1 and 2) request message processing

If no messages are being processed by the KITZ 201 (no buffered masterrequests or pending downstream unit replies), the first complete error freemessage received on port 0, 1 or 2 will be processed by the KITZ 201.

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The KITZ201 will determine if the received message can be transmitted to theaddressed downstream unit at the current time (this will depend if a block transferor setting change sequence is in progress and on the message contents). If themessage has a non global address, one of the following then occurs :

a) the message will be transmitted to the addressed downstream unit,

b) the message will be held within the KITZ 201 until it can be transmitted,

c) a message containing an error reply indicating that the message cannot besent (eg. ERR_NOACCESS) will be returned to the master which made theoriginal request.

If the message has a global address, all non-interruptible setting changesequences being performed on the downstream units will be aborted before theglobal address message is transmitted to the downstream units.

If messages are being processed by the KITZ 201 (eg. a downstream unit reply ispending), any error free messages received on ports 0, 1 or 2 will be held in a

buffer until they can be processed. When the current message processing hasbeen completed (eg. the downstream unit reply is received by the KITZ 201), thebuffered messages will be processed in received chronological order or on aport priority basis (see section 6.5.12) on an address by address basis. Globaladdress messages take precedence over non globals.

6.5.4 Busy replies from the KITZ 201

If a response to a master request cannot be made within a user specified time("P0 Reply Timer", "P1 Reply Timer" or "P2 Reply Timer"), a busy reply will be

returned to the master (except for Reset Remote Link commands). The timeduration over which busy replies are returned to a master request depends on thecommunications being performed by the unit. If a block message transfersequence is being performed on another master port to the same address, somecommands cannot be interleaved, so busy responses will be returned until thesequence is completed.

Since the KITZ 201 has to re-transmit all Port 0, 1 or 2 master requests on Port 3,the non busy downstream unit reply will rarely be available within the time-outperiod (unless a large timer value, say >50ms is used), so that a busy reply will

almost always be returned to a master request.The other status bits within the Courier status byte reflect the latest values (for thecurrent downstream unit address) that have been extracted by the KITZ 201polling process.

Downstream unit responses to master request messages will be held within theKITZ 201 until re-requested by the master (via Poll Buffer). If a different request isreceived from the same master, before extraction of the stored reply message, thestored message will be discarded and the new request sent to the downstream

unit.If a new request is received from the same master before a reply (busy or nonbusy) has been sent by the KITZ 201 to the master in response to a previousrequest, the new request will be ignored.

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6.5.5 Communication between KITZ 201 and downstream units

After the first valid reply (busy or non busy) to a downstream request is receivedby the KITZ 201, the address is added to an internal poll list within the KITZ 201.When request messages are not being received on Ports 0, 1 and 2, the KITZ201 will poll all downstream unit addresses in the poll list with a messagecontaining the Poll Status command. The current status of each downstream unitaddress (in the poll list) is buffered and can be extracted by a Port 0, 1 or 2master via the Poll Status/Poll Buffer commands (however the status busy bit willbe dependent upon the status of the communications between the Master and theKITZ 201).

When a new master request becomes available for transmission to thedownstream units, polling of the current address is completed before the newrequest is transmitted.

If the reply from the downstream units to a master request is not busy and thereply has been received within a user settable time period ("P0 Reply Timer",

"P1 Reply Timer" or "P2 Reply Timer") from the time that the original masterrequest was received1 by the KITZ 201, the result is transmitted back to themaster. If the elapsed time is greater, the reply is buffered and can be extractedby the master at a later date. The polling sequence is then re-enabled.

If the reply from the downstream unit (to a master request) is busy, the polling isre-enabled, but the Poll Status request for the pending downstream unit replyaddress is replaced by a Poll Buffer request. If a non busy reply is returned to theKITZ 201 Poll Buffer request and the reply has been received within "P0 Reply

Timer", "P1 Reply Timer" or "P2 Reply Timer" from the time that the originalmaster request was received1 by the KITZ 201, the result is transmitted back tothe master. If the elapsed time is greater, the reply is buffered and can beextracted by the master at a later date. The polling sequence is then re-enabledand the Poll Buffer request (for the specified address) is replaced by a Poll Statusrequest.

If a downstream unit sends more than a user-specified number of busy replies(P3 Busies) to the KITZ 201 unit, in response to a single master request, theKITZ 201 will assume communication with the downstream unit has failed and

will not return a reply to the master. Polling of the unit address via the poll list willnot continue and any new requests issued by the same master to the samedownstream unit address will be discarded until a Reset Remote Link command issent by the master (to the same address) and a corresponding valid reply isreceived.

The polling of downstream unit addresses via the internal poll list allows PollBuffer/Poll Status requests to be interleaved to all allowable addresses.This ensures that the average time for a non-busy reply for all addresses is

minimal and that the status for all addresses is updated as quickly as possible.

Note 1: A message (in IEC 60870 format) is not effectively received until 33 bit

periods (at the specified data rate) after the last byte of the messagehas been detected.

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The KITZ 201 will only perform consecutive Poll Buffer requests to the samedownstream unit address if only one downstream unit address is present(addresses contained within the poll list addresses are polled in ascendingorder).

6.5.6 Retries to the downstream units

After a master request message has been received by the KITZ 201 and re-

transmitted to a downstream unit, the KITZ 201 will then wait for a response. Ifno response is received within a user specified time-out period (P3 Reply timer), auser specified number of retries (P3 Retries) will be performed. If this fails togenerate a response, any new requests issued by the same master to the samedownstream unit address will be discarded until a Reset Remote Link command issent by the master (to the same address) and a corresponding valid reply isreceived.

If communication has been previously established between the KITZ 201 and adownstream unit, communication failure will result in the address being removedfrom the KITZ 201 poll list.

6.5.7 Block messages transfers

Any multiple command sequences eg. block transfers or settings changesinitiated by a master (to one specific downstream unit) cannot be completed byanother master via a different communication port.

Block message sequences from multiple masters can be interleaved only if theaccessed downstream units have different addresses. Interleaving of block

message sequences to the same address is not allowed since this would abort thefirst block message transfer sequence.

6.5.7.1 Block transfer from a Courier Address

The KITZ 201 will only know of the existence of a "Blocked" reply message whenthe downstream unit returns the block header. Once a block transfer has beeninitiated between one connected master and one downstream unit, other masterstations will be prevented from sending requests that may produce blockmessage replies to the same downstream unit (a busy reply will be returned) until

the block transfer is completed or terminated. Simple commands and settingchanges (to the same address) are allowed within block message accesssequences.

The block message transfer procedure will be terminated when the correspondingblock footer or an erroneous reply is received from the downstream unit.

In order to prevent one master station locking out access to a relay address(by other master stations) for excessive periods, a user specified block messagetime-out ("P0 Block Timer", "P1 Block Timer" or "P2 Block Timer") is used to

terminate the block transfer procedure for the appropriate address.

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6.5.7.2 Block transfer to a Courier address

The KITZ 201 will not perform message interleaving on block transfer of data tothe unit address or downstream addresses.

Block transfers from a master to a specific Courier address are allowed and maybe completed by another master unless action is taken by the user. In order toprevent block message sequence corruption, the store block command sequence

(initiated by the "Store Block Identifier" command) should only be sent by onemaster to the unit while the other masters are inactive. If the user requires toperform the block transfer via Port 0, the user can disable Ports 1 and 2 toprevent sequence corruption. If the user requires to perform the block transfer viaone of the other ports, the temporary Port 0 connection should be removed orprevented from performing "Store Block" transfer sequences.

6.5.8 Setting changes

6.5.8.1 Setting change interleaving

Once a setting change has been initiated between one connected master andone downstream unit (by issuing an Enter Setting Mode command), other masterstations will be prevented from performing setting changes to the samedownstream unit until the setting operation has been completed or aborted.

Setting change sequences initiated via one master (to one specific downstreamunit) can be interleaved with setting change sequences (initiated from mastersconnected to a different master Port) only if the destination downstream unitshave different addresses.

Simple data requests to the same downstream unit from other masters will beallowed. Access to the same downstream unit by another master during non-interruptible sequences in the change of settings procedure will be prevented(eg. between the Preload Setting and Execute/Abort Setting commands).

If a message cannot be interleaved while the setting change is in progress, anerror reply indicating that the message cannot be sent (eg. ERR_LOCAL) will bereturned to the master which made the disallowed request.

The settings change procedure will be terminated when the Abort Setting or

Execute Setting command is issued by the master which initiated the settingchange or if an erroneous reply is received from the downstream unit.

In order to prevent one master station locking out access to setting changes(by other master stations) for excessive periods, a user specified setting time-out("P0 Setting Timer", "P1 Setting Timer" or "P2 Setting Timer") is used to terminatethe setting change procedure for the address in question. If the address isexpecting an "Execute Setting" request, the KITZ 201 will issue an "AbortSetting" request to terminate the setting. The time-out period can be extendedby re-issuing the "Enter Settings Mode" command to the same menu cell of thesame address.

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6.5.8.2 Downstream unit setting change interleaving

If the system password of a connected downstream address is correctly enteredvia one of the KITZ 201 master ports (Port 0, Port 1 or Port 2), access to thepassword protected settings of the downstream address will be possible via theother master ports without re-entering the password. If the user requires toperform the setting access via Port 0, the user can disable Ports 1 and 2 toprevent unwanted access via the other ports. See section 8.3 Courier Passwordfor details of password operation.

6.5.9 Changes to KITZ 201 unit settings

This will follow the general interleave procedure for settings. The settings of theKITZ 201 unit can be changed via ports 0, 1 or 2. Setting changes can only beperformed via one port at any one time. Attempts to change the settings via asecond port while a setting change is in progress will not be allowed.

When the system password of a connected downstream address is correctly

entered via one of the KITZ 201 master ports (Port 0, Port 1 or Port 2),the password timer "UNS Passwd Timer" is enabled. If a setting change is inprogress and the password timer expires before the associated setting timer("P0 Setting Timer", "P1 Setting Timer" or "P2 Setting Timer") expires, the settingwill be aborted.This can be prevented by setting the password timer to a value greater than orequal to the highest setting timer value.

6.5.10 Global requests

Global requests consist of two consecutive identical messages.Once a valid global message pair has been received, these will be sent to thedownstream units and KITZ 201 menu when all other pending requests havebeen completed. The KITZ 201 will respond with a busy reply to any othermaster non global requests (except the Reset Remote Link command) while aglobal message is being processed. Reset Remote Link commands, receivedwhile a global message is being processed, will return a valid response if therequest address was present before the global command was received (ie. thedownstream unit address was contained in the KITZ 201 poll list). If not, then a

response will not be returned.

Global requests received on the ports while the unit is busy will be sent to thedownstream units and KITZ 201 menu as soon as possible. In order to improvecommunications reliability and security, the KITZ 201 unit will transmit two globalmessages to the downstream units if the message is a "Set Real Time" commandrequest; otherwise, three global messages will be transmitted. The time delayperiod between the consecutive global transmissions on Port 3 is specified by thesetting "P3 Gtrans Timer" in the "PORT 3 SETTINGS" menu column.

Valid global request messages (two identical messages) received by the KITZ201 will be re-transmitted on Port 3 even if no downstream units are connectedto Port 3.

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If a global address message is sent to the KITZ 201, while a non-interruptiblesetting change sequence is being performed on one or more downstream units,an Abort Setting command will be sent to those downstream units before theglobal address message is transmitted to the downstream units. If a non-interruptible setting change sequence is being performed on the KITZ 201Courier database (menu), the setting will be aborted and the global messageprocessed.

No reply messages are generated in response to global requests.

Global transactions (eg. time synchronisation messages) that are repeatedly sentto the KITZ 201 may result in loss of communication to the non-global addresses.As a guideline, global message pairs should not be sent at a rate of more than 1per minute.

6.5.11 Multiple transactions

Messages containing multiple transactions are allowable if all of the commands

within the message can be interleaved with any operations (eg. block transfers/setting changes) that are being performed at the time of reception of the multipletransaction request. If any command within a multiple transaction cannot beinterleaved for any reason, an error response will be produced to eachcommand within the message. The command errors produced by the KITZ 201are listed in Table 5.

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Command Error (Text)Error(Value)

ABORT SETTING ERR_INVALIDCMD 0x09

ACCEPT EVENT ERR_OK 0x00

CHANGE DEVICE ADDRESS (use ERR_INVALIDCMD see note 1) 0x09

ENTER CALIBRATION MODE ERR_NOVERIFY (see note 2) 0x04

ENTER CONFIGURATION MODE ERR_NOVERIFY (see note 2) 0x04ENTER SETTING MODE ERR_NOACCESS/ERROR_LOCAL 0x03

(see note 6)

EXECUTE SETTING ERR_NOACCESS 0x03

EXIT CALIBRATION MODE ERR_NOVERIFY 0x04

EXIT CONFIGURATION MODE ERR_NOVERIFY 0x04

GET COLUMN HEADINGS ERR_NODATA 0x02

GET COLUMN TEXT ERR_NODATA 0x02

GET COLUMN VALUES ERR_NODATA 0x02GET DEVICE LIST ERR_NODATA 0x02

GET DISPLAY ERR_NOACCESS 0x03

GET STRINGS ERR_NODATA 0x02

GET TEXT ERR_NOACCESS 0x03

GET VALUE ERR_NOACCESS 0x03

LDU GET DISPLAY ERR_NOACCESS (see note 3) 0x03

LDU LOG OFF ERR_OK (see note 3) 0x00

LDU LOG ON ERR_NOACCESS (see note 3) 0x03

LDU SEND KEY PRESS ERR_NOACCESS (see note 3) 0x03

LOAD SHED BY GROUP ERR_INVALIDCMD 0x09

LOAD SHED TO LEVEL ERR_INVALIDCMD 0x09

POLL BUFFER ERR_INVALIDCMD (see note 4) 0x09

POLL STATUS ERR_INVALIDCMD (see note 4) 0x09

PRELOAD SETTING ERR_NOACCESS 0x03

RESET MENU CELL ERR_NOACCESS/ERROR_LOCAL 0x03(see note 6)

RESET REMOTE LINK N/A (see note 5) 0x09

RESET TRIP INDICATION ERR_OK 0x00

SELECT SETTING GROUP ERR_NOACCESS 0x03

SEND BLOCK ERR_NODATA 0x02

SEND EVENT ERR_NODATA 0x02

SET REAL TIME ERR_NOACCESS 0x03

Table 5. KITZ 201 Command Error Responses.

Note 1. This command does not generate an error because it is not used as asimple transaction.

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Note 2. These commands would never be sent via a KITZ 201, because theyrequire a six figure password. The error is returned so that the positionof all further requests within a multiple transaction is preserved.

Note 3. These commands are not supported by the KITZ 201

Note 4. These single transaction commands are not normally processed by theinterleaving functions. The returned error allows position alignment ofthe request/reply data within a multiple transaction when the command

is contained within the multiple transaction.Note 5. Reset Remote Link can only be sent as a single transaction; no error is

generated.

Note 6. The ERR_LOCAL response will be returned if this command could not besent to the downstream units because a setting change sequence to thesame address was in progress.

6.5.12 Communication port priority

Under normal circumstances, the incoming messages are processed in (received)

chronological order, regardless of which port they are received on.Message prioritisation is used when master request messages to a particulardownstream address (and/or the KITZ 201 unit address) cannot be sent,because a non-interruptible message sequence is being performed by anothermaster, or a reply is pending from a downstream unit. Prioritisation will allow theresponse time to a particular master to be reduced for these situations.

Prioritisation of request messages is performed on an individual address basis.

The front communication port and rear two master communication ports (ports 0,

1 and 2 respectively) can be set (via P0 Priority, P1 Priority and P2 Priority) to apriority level between 0 (highest) and 2 (lowest). Where the same priority settingis allocated for 2 or more ports, the priorities of the ports are equal. Thefollowing table gives examples.

Priority Front Port Rear Port 1 Rear Port 2 Priority SettingsExample (0) (Value)

1 Highest Middle Lowest P0=0 : P1=1 : P2=2

2 Lowest Highest Middle P0=2 : P1=0 : P2=1

3 Lowest Middle Highest P0=2 : P1=1 : P2=0

4 Middle Highest Lowest P0=1 : P1=0 : P2=2

5 Middle Lowest Highest P0=1 : P1=2 : P2=0

6 Equal Equal Equal P0=P1=P2=x

7 Lowest Equal Equal P0>P1: P1 = P2

8 Lowest Highest Disabled P0>P1 : P2=x

9 Highest Lowest Disabled P0P2 : P1=x11 Highest Disabled Lowest P0

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In some instances, the desired priority can be obtained by different combinationsof settings. If a communication port is disabled the corresponding priority settingwill be ignored.

6.5.12.1 Port 0, 1 and 2 operation

If no messages are being processed, the first complete error free messagereceived on any port will be processed. If messages have been buffered by the

KITZ unit, the current message being processed will be completed before anyprocessing is performed on any other messages.

When prioritisation of messages is operational (ie. two or more messages to thesame address have been buffered) and the priority of the communication ports isequal, the messages are processed in (received) chronological order, on anaddress by address basis regardless of which port they were received on.

When prioritisation of messages is operational and the ports are prioritised, themessages will be processed in port priority order on an address by address

basis.If two communication ports have equal priority and the other has lower (orhigher) priority, the equal priority port messages will be processed inchronological order, before (or after) the other port message is processed (on anaddress-by-address basis).

It should be noted that this prioritisation will operate only when messages arepending processing. If no messages are pending and the unit is being accessedby a high priority master performing certain multiple access sequences (eg.settings changes), a lower priority master can request data from downstreamunits during the idle periods between high priority master data requests.

6.5.13 Event/Alarm blocking

Event records from the KITZ 201 and connected Courier (downstream) unit canbe accessed from Ports 0, 1 or 2 via a suitable master station. The settings "P0Block Events", "P1 Block Events" and "P2 Block Events" prevent automatic eventextraction via the specified port. This feature allows all events to be automaticallyextracted by one master only, which will allow a master to produce a complete

centralised event list. A master can extract events using the "Get event"command regardless of the status of the port Block Events settings.

An event or alarm will result in the event flag alarm flag being set in the returnedCourier status byte. When event/alarm blocking is in operation, the event andunit request is received

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6.6 Real time clock (RTC) time and date setting

The current RTC time and date can be set via the communication ports.

Refer to the Safety and Commissioning and Maintenance sections for advice onhandling the Real Time Clock battery.

6.6.1 IEC 60870 time and date codes

The time and date setting can only be changed via the "Set Real Time" command.

The IEC 60870 setting format is as follows:

7 6 5 4 3 2 1 0 = bit position

ms7 ms6 ms5 ms4 ms3 ms2 ms1 ms0 ms = 0..59.999ms

ms15 ms14 ms13 ms12 ms11 ms10 ms9 ms8

IV =0 R I5 I4 I3 I2 I1 I0 I=0..59 Mins

SU R R H4 H3 H2 H1 H0 H=0..23 Hours

W2 W1 W0 D4 D3 D2 D1 D0 W=1..7 Day of week

D=1..31 Day of MonthR R R R M3 M2 M1 M0 M=1..12 Month of year

R Y6 Y5 Y4 Y3 Y2 Y1 Y0 Y= 0..99 Years

R = Reserved bit = 0.

SU = summertime: 0=standard time, 1 = summer time.

IV = invalid value: 0=valid, 1=invalid.

range = 0ms .. 99 years.

The IEC format does not contain the current century setting and this will not beheld within the KITZ unit.

6.6.2 Time tagging of master reply messages

The KITZ 201 unit will insert an IEC 60870 time tag into a master station courierreply message (on Ports 0, 1 or 2) if the following conditions apply:

1) The menu option is selected (for the required port).

2) The message contains a millisecond timer count (DTL Type 38h 3Bh), beforethe Courier status byte.

3) The message contains a courier status byte(s) (DTL Type 5Ch 5Fh).

4) An IEC 60870 time tag (DTL Type 3Ch 3Fh) is not already contained withinthe message before the Courier status byte.

The IEC 60870 time tag will be added after the millisecond count data. The timetag format specified is shown below:

IEC TIME Extended

DTL (EXT) length Millisecs Minutes Hour Day Month Year

3C 07 0 59999 0 59 0 23 1 31 1 12 0 99

If the menu option is not set, downstream all of the other conditions (2, 3 and 4)apply, the millisecond counter of the relay reply will be adjusted to take accountof (known) protocol conversion delays.

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6.7 Foreign data transmission

6.7.1 Foreign data transmission and termination

The Courier standard provides a special data type, Foreign Data DTL (Data Typeand Length), to interface other communication languages into a Couriercommunication system. A foreign message from another communication systemsuch as the Opticom and Optimho, can be packaged into a data packet of this

type and transmitted across the Courier system, effectively using Courier as atransport mechanism.

The foreign data transmission will be terminated either by the Opticom QUITcommand in the foreign data sequence or by the corresponding port settingtimers if the last command of the sequence is not Opticom QUIT.

Note that the Port Setting Timer is used in this case to time-out the foreign datasequence. The value of this setting should therefore be set in excess of themaximum expected foreign data response time.

6.7.2 Foreign data reply time

When transmitting foreign data to the KITZ103, care must be taken not to sendout a Poll Buffer/Poll Status or retry as this can upset the communications link.The processing of foreign data through the KITZ103 also takes a lot longer thana normal Courier message, therefore the Foreign Data Reply Timer (P3 FdataRply Tim) is provided to ensure that the KITZ201 waits a sufficient time for theforeign data response before performing a retry. Note that in practice, thissetting will be much bigger than the normal response reply timer (P3 Reply

Timer).6.7.3 Reset remote link response time

When using a KITZ 103, the Port Reset Timer should be increased such that aresponse to an initial Rest Remote Link command will be ensured.

6.7.4 Foreign data interleaving

It is possible for more than one master to transmit foreign data to differentdownstream units simultaneously. However, whilst foreign data transmission on a

downstream unit is in progress, access to the same downstream unit from anothermaster is forbidden.

6.7.5 KITZ 201 settings for foreign data transmission

Optimho can be connected to KITZ 201 via interface unit KITZ 103.The connection diagram is shown in the Service Manual Type KITZ 103 K-Bus toOptimho Interface Unit, ALSTOM Publication Number R8532.

The table below provides an example of the relevant settings for foreign datatransmission between an Optimho relay on Port 3 of the KITZ 201 and an

Opticom master Port 1 of the KITZ 201.

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Table: KITZ 201 setting example for foreign data transmission

Item Setting Remark

P1 Reply Timer 3 seconds Refer to section 6.7.2

P1 Reset Timer 10ms Refer to section 6.7.3

P1 Setting Timer 2 minutes Refer to section 6.7.1

P3 Fdata Rply Tim 3 seconds Refer to section 6.7.2

When using Opticom over K-Bus it is possible to vary the speed of the serialcommunication link at the PC and at the Optimho. See Opticom on-line help formore details.

6.8 Intermittent polling

The KITZ 201 will automatically generate Poll Status and Poll Buffer commandson Port 3 to allow extraction of downstream unit data and status. This feature canbe turned on or off by setting P3 Inter Polling to Off or On.

The P3 Polling Time is the time-out for P3 Inter Polling. The setting determines theminimum amount of inactivity on all master ports before the KITZ 201 will ceasepolling on Port 3.

The P3 Polling Stat displays the current status of polling on Port 3.

Section 7. IRIG-B CLOCK SYNCHRONISATION

The KITZ 201 is capable of synchronising the internal clock to an IRIG-B signalon the defined IRIG input. The signal must be in the code format specified in theInter-range Instrumentation Group standard 20089. The signal levelrequirements for this input are described in the technical data section.

The time signal produced by the IRIG-B input is universal co-ordinated time (UTC),depending on the time zone of the relay location this will be different to localtime. For this reason the KITZ 201 provides a setting allowing the time differencebetween UTC and the local time to be set in steps of 30 minutes. This setting and

other data concerning the clock can be found in the Real Time Clock menucolumn.

If the IRIG-B synchronisation has been enabled the date and time section of themenu will indicate the correct time if a valid signal is being received.

If the status of the IRIG-B input changes and the IRIG-B input is enabled, an eventwill be logged and an alarm issued. The Setting "RTC Alarm Time" specifies theminimum time interval that IRIG-B time synchronisation must be lost before anIRIG-B Time Synchronisation Lost alarm is issued.

The IRIG-B Time Synchronisation does not provide year information.The KITZ 201 uses the year information which is held in the Real Time Clock(RTC). The real time clock is normally set using the Set Real Time command whichwill only be accepted (by the RTC) if the IRIG-B is disabled. A setting is provided

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("RTC IRIGB Year") to allow only the year to be set if the IRIG-B is enabled, (theyear value is also saved in the RTC).

The "RTC IRIGB Year" setting accepts and displays the year as a four digitnumber, however, the IEC 60870 format time tag "year" will only contain twodigits.

If a permanent IRIG-B clock signal is not used, then the on-board Real Time Clock

has a greater significance.Refer to the Safety and Commissioning, Problem Solving and Maintenancesections for advice on handling the Real Time Clock Battery.

Section 8. USER INTERFACE

8.1 Introduction

The remote access system is based on the Courier communications language ofALSTOM T&D Protection & Control Ltd. This generic language has beendeveloped to provide remote control, monitoring, data extraction and settingchanges for protective relays within the substation environment. The languageconsists of a standard set of commands that act upon a database of settings anddata that is specific to the relay.

The Courier language and its communication medium supports connection toseveral devices simultaneously. This is achieved by allocating a unique addressto each relay, the relay will only respond to commands that are either global or

specifically directed to it. The relay is referred to as a slave device since it cannever initiate communication, it can only respond to a request from the masterdevice.

The remote user interface is accessed by a PC installed with Courier basedaccess software. This software polls all relays connected to its system and allowsthe user to retrieve information from each relay by extracting the contents of itsdatabase. It also allows authorised users to make setting changes to the relay.

ALSTOM T&D, Protection & Control Ltd. can supply remote access software for

use on a standard IBM compatible PC. Alternatively, third party softwaredeveloped for data acquisition can be connected to collect data for data loggingequipment; eg. SCADA.

Typical features of a remote access system are:

To provide the user with the ability to examine the KITZ 201 and connectedCourier unit menu. The remote system can present the user with a list ofavailable sections first. By selecting a particular section its contents can thenbe displayed. The remote system can normally display an entire page

(window) of the section titles or the section contents at once. Remote metering. The measurement values, which can be displayed on the

front of the connected downstream units, can be regularly polled and stored todisk. They can also be graphically displayed on the screen of the PC.

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Automatic extraction of events and fault records. A sequential list of eventscan be captured automatically and displayed on the screen as they occur.They can also be stored on to the disk and printed later.

Disturbance recorder. Disturbance records can be extracted from theconnected Courier downstream units and stored for further analysis. It is alsopossible for the access software to detect the presence of disturbance recordsas they occur and automatically extract them. These waveforms are available

in the COMTRADE format.

Remote change of settings. If the remote setting change facility is enabled inthe connected Courier devices, then settings can be changed remotely.

Transfer settings from or to the KITZ 201 and the Courier downstream units.

This section of the manual describes the use of the KITZ 201 menu assuming thataccess software is being used to interrogate the relay. It does not describe theCourier commands that are used to implement this. For more information on theCourier language, refer to publication R6512, the Courier User Guide.

8.2 Courier database

As already described, the Courier language consists of a standard set ofcommands which act upon a database which is specific to a relay. When usingthe access software it is not necessary to understand the commands that arebeing issued. This section describes the general format of a Courier databaseand explains the layout of the database implemented within the KITZ 201.

8.2.1 General features of a Courier database

The database is two dimensional with data being logically grouped together incolumns, each column having a text header (in the first row). As an example, allmeasured values or all settings related to a particular function may be placed ina single column. Each item within a column has a text descriptor and associateddata, this is referred to as a cell. Depending on the attributes of the cell, the datawithin the cell may, or may not, be modifiable. Modifying the value of a cell canbe used to make a setting change or to perform a command. A more detaileddescription of the structure of a Courier database and the commands used tointerrogate it can be found in the Courier User Guide R6512.

To access the database the relay must first be selected from a list of all connectedslave devices. The column headers then appear as a list and the contents of acolumn can be viewed by selection of the appropriate header. This will producea list of the cells within the column and includes the text descriptor and the valuefor each cell within the column. Using the same method, a particular cell can beselected from the list for editing.

8.2.2 KITZ 201 database

A reference to the structure of the Courier database is given in Section 11.The database for all models of the KITZ 201 is the same. Cells associated withfunctions that are not implemented on all models are invisible if appropriate.

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The System Data column of the database is standard to all Courier devices andcontains important information that is used to identify the unit to the accesssoftware. The remainder of the data base contains settings and data and can bebrowsed and modified by the user.

8.3 Courier password

To be able to modify the unit settings or use the commissioning tests the user must

correctly enter a four-character Courier password. The relay settings are visiblebut not settable if the password has not been set.

To set the password first select the "System Data" column using the AccessSoftware, the second item within the column is the unit password. The correctvalue of this cell is not visible and is instead represented as "****".The password protection is unlocked by setting this cell to the correct value usingthe access software, to ensure security the value of the cell is not visible via theremote interface even when password protection has been unlocked.

To change the relay password using the remote software the password unlockmust first be removed using the method described above. Changing the setting ofthe password cell again allows a new password to be set. The password unlockcan be removed by resetting the password cell. If no setting changes are madeto the database for a set period of time the password unlock will self reset.This time period is specified by the "UNS Passwd Timer" setting (in the "UNITSETTINGS" menu column). It should be noted that the "P0 Setting Timer", "P1Setting Timer" and "P2 Setting Timer" settings will be overridden by the "UNSPasswd Timer" setting when the password timer is active (see Section 6.5.9).

The password timer setting applies to Ports 0, 1 and 2. These settings are foundin the "PORT 0 SETTINGS", "PORT 1 SETTINGS" and "PORT 2 SETTINGS" menucolumns respectively.

If this password is lost and access is required please contact yourlocal ALSTOM representative.

8.4 Remote access password protection

Remote access password protection allows additional security to be providedwhen accessing the KITZ 201 unit from a remote terminal (via a modem).

This requires the connected master stations to send passwords to the KITZ 201 inorder that a communication session can be established between the masters anda group of downstream Courier units. This is an optional feature and is providedfor Ports 1 and 2.

Remote access password protection is activated via the settings "P1 PasswdEnable" and "P2 Passwd Enable". Once enabled, the associated input portaccess is limited to the KITZ 201 menu. A password is then entered to a menucell "P1 Passwd Entry" or "P2 Passwd Entry", which will allow access to the

downstream units. This password can be changed in a similar manner to theSYSTEM DATA password, the only difference being that this is performed viaanother menu cell "P1 Passwd Change" and "P2 Passwd Change" which ispassword protected using "SYS Password".

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Communication ports 1 and 2 have individual remote access passwords.The passwords "SYS Password", "P1 Passwd Change" and "P2 PasswdChange" can be set to the same value if only one password is required.

When password protection is not enabled, access to all downstream units andthe KITZ 201 menu is possible.

A time-out period is used to terminate the password protection following

termination of a communication session. The time period is specified by"P1 Passwd Timer" and "P2 Passwd Timer" in the "PORT 1 SETTINGS" and"PORT 2 SETTINGS" menu columns.

8.5 Extended password protection

The "UNS Extended PWP" setting in the Unit Settings menu column is used toapply password protection to all communication settings within the unit. This canbe used in conjunction with the remote access password protection to prevent theKITZ Unit and downstream unit(s) settings from being changed remotely by

unauthorised users.8.6 Data cells

There are cells within the database which cannot be set; these contain the unithardware and software configuration and stored information to be viewed.Some of these cells, such as those that related to the unit configuration, willalways contain the same data. Others, such as those used for accessing storedrecords, can be controlled using a settable cell to index the record beingexamined. There are other cells containing the current date and time and

measurement values that are continually updated by the relay.8.7 Event extraction

The KITZ 201 supports the standard mechanism for event extraction.The KITZ 201 operates completely transparently when event and fault recordextraction is being performed. The access software is used to poll the relay on aregular basis. When event or fault records occur the access software is able toextract the events automatically. The events may be displayed on the VDU orstored to a file.

8.8 Use of modems

The rear serial ports of the KITZ 201 are suitable for permanent connection to amodem, the port is both isolated and supports the handshaking lines required formodem communications.

8.8.1 Selection of modem

The KITZ 201 communications can operate with a wide selection of modems,however the selection of modem may place restrictions on the communication

parameters used. The following parameters should be considered:Frame Size The IEC 60870 FT1.2 protocol used by the unit consists of aneleven bit frame and to use this protocol via a modem the modem must supportthis frame size. A 10 bit version of the protocol can be selected (IEC 60870 but

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with no parity bit). This is less secure but allows a wider selection of modems tobe used.

Idle Period It is a requirement that the data frames are transmitted with no idleperiods and for this reason the inter-modem link must be at the same baud rateas the link to the relay. It must also be possible to disable all error correction,data compression, speed buffering or automatic speed changes.

Baud rate The unit is capable of communication at up to 115200 baud: themodem may cause a restriction on the baud rate used.

8.8.2 Connection to modem

It is necessary for the hardware handshaking lines to be connected between theKITZ 201 serial port (1 or 2) and the modem. The connection details for this linkare described in section 4.1.2 Rear RS232 (IEC 60870) connection.

8.9 Invalid settings

The invalid settings alarm (SYS Alarms Flag 1) indicates the settings for theKITZ 201 are invalid.

This alarm will be raised when the unit detects that the current settings containedin the units memory are invalid.

Clearing the alarm will not copy the default settings to the non-volatile area.The default settings will only be loaded if the non-volatile settings are corruptedand the unit is re-energised. After the default settings have been loaded, SYSAlarms Flag 2 will be set to indicate that the default serial number is beingused. The default seri