Transfix User Guide

TRANSFIX Users Guide

TTRRAANNSSFFIIXX Transformer Oil

Dissolved Gas and Moisture Monitor

Users Guide Including the Modbus Protocol Implementation

40-0097-11

2008 Kelman Ltd. All Rights Reserved



CONTENTS

1. OBJECTIVE OF THIS DOCUMENT 1

2. TECHNICAL SPECIFICATION 1

3. SYMBOLS USED 1

4. HAZARDOUS SUBSTANCES 2

5. POWERING UP THE TRANSFIX 2

6. TRANSFIX INFORMATION SCREEN 3

7. TRANSFIX MANUAL OIL SAMPLING PROCESS 4

8. AIR INTAKE FILTER CLEANING 6

9. OIL FILTER CLEANING 6

10. MODBUS PROTOCOL 7

APPENDIX 1. INFORMATION SCREEN DISPLAYS 16

All rights Reserved Kelman Ltd.

This release of this document and is accurate at the time of this writing. Kelman ltd reserves the

right to change TRANSFIX and this document without notice

Kelman Ltd, Lissue Industrial Estate East, Lissue Road, Lisburn, BT28 2RE, United Kingdom

Tel: +44 28 9262 2915, Fax: +44 28 9262 2202 e-mail: [email protected], Web: www.kelman.co.uk


TRANSFIX Users Guide Page 1 Ver. 40-0097-11 17/11/2008

1. Objective Of This Document

This document outlines the normal operation of the TRANSFIX unit. Once the TRANSFIX unit is installed the local operation is very simple. This document outlines the use of the LCD Information Screen and the Manual DGA Sampling Function.

The only maintenance is a periodic cleaning of the air intake filter and the in-line oil filters.

The details of the Modbus RTU protocol are also included in this document.

NOTE: If the equipment is used in a manner not specified by the manufacturer, the protection provided by the equipment may be impaired.

2. Technical Specification PARAMETER

VALUE/MEETS

GAS MEASURED

MEASUREMENT RANGE (ppm)

Hydrogen (H2) 5 - 5,000 Methane (CH4) 2 - 50,000 Ethane (C2H6) 2 - 50,000 Ethylene (C2H4) 2 - 50,000 Acetylene (C2H2) 0.5 - 50,000 Carbon Monoxide (CO) 2 - 50,000 Carbon Dioxide (CO2) 20 - 50,000 Oxygen (O2) 100 - 50,000 ACCURACY OF GAS MEASUREMENTS

± 5% or ± LDL (whichever is greater)

Water (H2O) 0-100% RS (given at 25°C, or at measured oil temp, or ppm)

Nitrogen (N2) 10 – 150,000 ppm, accuracy ±15% (free breathing transformer)

ENVIRONMENTAL

External temperature range -40 to 55°C Altitude Less than 2000m Atmospheric pressure Less than 1050mbar Oil temperature range -40 to 120°C Operating humidity 10 - 95% RH non-condensing Enclosure IP55 Weight Less than 80 Kg (176 lbs) POWER REQUIREMENTS

110/230VAC (FACTORY SET), 50/60Hz, 8A Max

Single phase Alarm Relays: NO and NC provided

5A 250VAC, 5A 30VDC

Fuses* 10A 500V (gG), 10 x 38mm. MEASUREMENT FREQUENCY

Variable - 1 per hour to 1 per day

*For continued fire protection, use only approved and recommended fuse.

3. Symbols Used The following symbols are used in TRANSFIX and in this document:

Caution, risk of electric shock.



4. Hazardous Substances The gases measured in TRANSFIX are extracted from the oil and exhausted to atmosphere. Gases exhausted by TRANSFIX are at concentrations which are non flammable and non toxic. All exhausted gases are quickly diluted into surrounding atmosphere. .

5. Powering Up The TRANSFIX

Figure 1. Indicator Lights and Fuseholders

Disconnection from the supply is achieved through the modular fuseholders mounted adjacent to the mains inlet terminals (see figure 1).

If the TRANSFIX is powered up in cold conditions (less than -10°C), the unit will perform a Cold Start sequence. The internal heaters will be switched on. The main DC power supply will not switch on and the DC power indicator lights will not light up. Once the TRANSFIX unit has warmed itself up to -10°C, the DC power supplies will be switched on. The DC power indicator lights are situated on the circuit board at the back of the TRANSFIX casing (see figure 1).

After the DC power supplies have switched on, the internal temperature of the TRANSFIX may take several hours to come up to working temperature before a measurement cycle will begin.

The TRANSFIX uses a lithium coin cell battery. The lithium coin cell battery is a long-life battery and may never need to be replaced. The battery is accessed behind the front panel, which can be opened by turning the ¼-turn screws. If battery replacement is necessary, save the TRANSFIX data, as it will be lost when the power is off and the battery is removed. Switch off the TRANSFIX while it is in Standby. Slide the battery

out of its cover (see figure 2). Replace with a new battery in the same polarity. Dispose of the used battery in accordance with local regulations. Switch the TRANSFIX on again. Battery Type: Lithium Coin Cell, CR2450 3V 620mAh. CAUTION: There is a danger of a new battery exploding if it is incorrectly installed. Replace the battery only with the same or equivalent type recommended by the manufacturer. Do not dispose of the battery in a fire or with household waste. Contact your local waste disposal agency for the address of the nearest battery deposit site.

Figure 2. Coin Cell Battery.

12VDC 24VDC Fuseholders for mains input power



6. TRANSFIX Information Screen The LCD Information Screen is located within the TRANSFIX unit (see figure 3), and can be viewed when the door is opened.

Figure 3. Inside View of TRANSFIX During an analysis, the Information Screen displays the serial number of the TRANSFIX unit, and details of the operational state of the TRANSFIX. The screen automatically pages through information about the date and time and the results of the last analysis for each oil circuit. The information can also be accessed by pushing the scroll buttons to SCROLL UP and SCROLL DOWN through the information. The screen will also give information if an error occurs within the TRANSFIX (see Appendix 1). The description of the errors is given in clause 7.7 below. It should be noted that the error numbers are offset by 1 from the MODBUS register bit numbers.

LCD INFORMATION SCREEN

SCROLL UP SCROLL DOWN START MEASUREMENT STOP MEASUREMENT MANUAL SAMPLING USB CONNECTION

ON/OFF Switch



7. TRANSFIX Manual Oil Sampling Process The TRANSFIX unit provides one manual oil sampling port; this port is located on the base of the TRANSFIX and consist of a quick-connect body and a captive body protector fitting (see figure 4).

Figure 4. Oil Filters and Manual Oil Sampling Port viewed from front of unit A male quick-connect fitting and valve assembly has been provided in the installation kit with the TRANSFIX unit. The TRANSFIX will also ensure that there is fresh oil at the sampling point when the sampling process takes place.

Figure 5. Manual Oil Sampling Arrangement

Sampling port

TRANSFIX Casing

Oil filters

CLOSED

Oil sampling valve assembly with Luer fitting

OPEN

Quick-connect body protector – pull collar down to release



Follow the process below to obtain an oil sample (see figure 6 for procedure diagram):

1. Open the door to the TRANSFIX. If the TRANSFIX is in STANDBY, proceed to step 3. If a measurement is in progress, manual sampling will be prevented. If the white MANUAL SAMPLE button is pressed, a warning message will be displayed on the LCD screen “MANUAL DGA PREVENTED / MEASUREMENT IN PROGRESS”.

2. Press the red STOP button to stop the process. The LCD display will read “OIL DRAINING”. If there is oil in the headspace, the draining process may take a few minutes. The TRANSFIX will then return to STANDBY mode.

3. When the TRANSFIX is in STANDBY mode, press the white MANUAL DGA push button.

4. The timer will count down from 10 seconds.

5. The LCD display will read “MANUAL DGA / PURGING OIL .. / PRESS KEY WHEN DONE”. Wait at least two minutes for the oil to purge (this will bring fresh oil from the transformer to the sampling point), then press the white button again. The LCD display will read “MANUAL DGA / TAKE OIL SAMPLE! / PRESS KEY WHEN DONE”. This indicates that you can begin your oil sampling process.

6. Remove the quick-connect body protector by pulling the collar down. Fit the male quick-connect fitting and valve assembly to the quick-connect body in the base of the TRANSFIX unit (see figures 4 and 5. Ensure that the valve is closed to prevent oil leakage. Remove the Luer fitting cap and fit the oil sampling equipment to this valve and perform the oil sampling according to your standard process and procedures.

7. When you are finished sampling, close the valve and disconnect your oil sampling equipment.

8. Remove the male fitting and valve assembly, and replace the body protector fitting on the quick-connect body.

9. Push the white pushbutton once to return the TRANSFIX unit to Automatic mode.

10. If the TRANSFIX is left in Manual Sampling mode, it will revert to Automatic mode after one hour.

Figure 6. Manual Oil Sampling Procedure

Measurement will begin at the next scheduled measurement time. To start a measurement immediately, press the blue START MEASUREMENT button and choose the oil circuit to be measured.

See Appendix 1 for Screen Displays.

TRANSFIX is in Standby mode

TRANSFIX is in Measure- ment mode

Press STOP MEASURE-MENT button

TRANSFIX returns to Standby mode

Oil draining

Press MANUAL DGA button briefly

Allow oil to purge for at least two minutes

Press MANUAL DGA button briefly to stop pump

Remove Quick-connect body protector Connect sampling valve arrangement with valve closed Open sampling valve and take oil sample Close sampling valve and remove sampling equipment Replace Quick-connect body protector

Press MANUAL DGA button briefly to return to automatic mode



8. Air Intake Filter Cleaning The TRANSFIX unit draws air from the right side of the unit and exhausts it on the bottom. The intake air is filtered to catch the largest particles and depending on the environmental conditions, this filter may need occasional cleaning and could be indicated by a Non Critical TRANSFIX error, Zone 2 temperature too high indication in the data file. To clean the filter:

1. Slide up the cover on the right hand side of the TRANSFIX casing to reveal the black fan/filter assembly.

2. If a cable-tie is fitted to the filter holder, remove it carefully. Remove the filter holder by pulling off the black snap off cover to the filter.

3. If the filter is just dusty, clean it with dry compressed air or by beating it on a metal structure.

4. If the filter is oily, clean it with mild soap and water, and then dry it thoroughly.

5. Replace the filter and snap the cover back in place. The cable-tie does not need to be replaced as it is provided for transport only.

6. Slide the cover down over the filter.

9. Oil filter cleaning The oil is filtered to prevent particles from entering the TRANSFIX unit, or to prevent particles from being returned to the transformer; this filter may need occasional cleaning and this will be indicated by a Non Critical TRANSFIX error, “oil pressure too low” or “oil pump tacho count too high” indication in the data file. The power to the TRANSFIX unit must be switched off and the oil supply valve must be closed before removing the filter housing. Figure 4 is a view of the connections at the bottom of the TRANSFIX unit showing the oil filter cartridges.

1. If a measurement is in progress, press the red pushbutton labelled STOP MEASUREMENT. This will abort the process and the TRANSFIX unit will return to standby mode. Switch off the power to the TRANSFIX once it is in standby mode.

2. Remove the nut that houses the filter. The filter is inside but, care must be taken as there is also a spring. There also may be a little oil which will leak out.

3. Remove the filter and clean it and then just place it back inside and replace the housing. The filter can be cleaned with a brush and compressed air.

4. Replace and tighten the nut, using a backing wrench to hold the filter housing in place. 5. Turn the power back on and the TRANSFIX will automatically begin measuring at the

next scheduled run. Note: The compression nuts on either side may need to be loosened slightly to turn the filter to a more convenient position, and must be re-tightened once the procedure is complete.

10. Waste Electrical and Electronic Equipment WEEE Directive In the European Union, this label indicates that this product should not be disposed of with household waste. It should be deposited at an appropriate facility to enable recovery and recycling. For information on how to recycle this product, please visit www.kelman.co.uk and follow the links for WEEE.



11. Modbus Protocol The MODBUS implementation for TRANSFIX follows the recommendations given by the MODBUS-IDA organization for a BASIC implementation class. Additional information about the MODBUS protocol and its implementation can be found in the documents "MODBUS Application Protocol Specification V1.1a" and “MODBUS over serial line V1.02”, which are available on the Internet at: http://www.MODBUS.org The TRANSFIX has two serial channels. These can be configured to use MODBUS-RTU or MODBUS-ASCII with various baud rate and parity configurations, over a number of different physical interfaces. Also available is an Ethernet port which supports MODBUS-TCP on a configurable TCP port. TRANSFIX operates as a slave device. It should be assigned a MODBUS slave address in the range 1-247. Transfix will only respond to MODBUS commands with the correct address. The TRANSFIX currently supports the following MODBUS function codes:

Code Function Description

01 Read Coils These are effectively the same in the Transfix implementation. Both allow the user to read a number of inputs (1-2000) in a single command. 02 Read Discrete Inputs

03 Read Holding Registers These are effectively the same in the Transfix implementation. Both allow

the user to read a number of registers (1-125) in a single command. 04 Read Input Register

06 Write Single Register Allows the user to write a single register.

16 Write Multiple Registers

Allows the user to write multiple (1-120) registers in a single command.

The TRANSFIX supports the following MODBUS Exception responses:

Code Exception Description

01 Illegal Function The function code received in the query is not implemented by the Transfix.

02 Illegal Data Address The data address (or range) received in the query is not an allowed address.

03 Illegal Data Value A value contained in the query is not an allowed value for the particular register.

04 Slave Device Failure An unrecoverable error.

TRANSFIX MODBUS REGISTERS The MODBUS specification only defines 16-bit integer registers. However it is possible to use these 16-bit registers to store other types of data in different data formats. The TRANSFIX registers can store character strings, bit fields and floating point values. These are all read as integers using the MODBUS commands, and must be correctly interpreted by the master device. It is anticipated that not all MODBUS masters will be able to correctly interpret non integer data, so the main critical data has been duplicated in both integer and floating point format. All data is formatted in Big Endian byte order. Character strings are simple fixed length 8-bit ASCII strings, where each MODBUS 16-bit integer contains two ASCII characters. If a smaller string length is required, it must be padded with NULL characters. Floating point values are stored in 32-bit IEEE-754 format in two adjacent 16-bit registers.



Note that the MODBUS register numbers are given below in the modern format consistent with the latest MODBUS specifications. MODBUS register 1000 would have been referred to as register 41000 or 4:01000 in previous versions of this specification.

Register R/W Group

Size Description Data Format

1000 R/W 16

ID String 32 character string.

1001

1002

1003

1004

1005

1006

1007

1008

1009

1010

1011

1012

1013

1014

1015

1016 R 8

Transfix Serial Number 16 character string. Normal format is TX1-C00001

1017

1018

1019

1020

1021

1022

1023

1024

R 1

TRANSFIX firmware version: Major.Minor.Build

Bit field: bits 15-12 - Major version bits 11-8 - Minor version bits 7-0 - Build

1026 R 1 Number of oil sources available 16-bit unsigned integer

1027

R 1

Indicates the class of TRANSFIX

0 = Standard Transfix (1.6) 1 = TAPTRANS 2 = MULTITRANS 3 = MINITRANS 4 = DUALTRANS

1028 R 1

Indicates the chosen user language. 0 = Neutral (English default) 1 = Alternative language (see below).

1029 R 2 TRANSFIX firmware revision 32-bit integer

1030

1051

R/W 1 Measuring / Standby 0x0000 = Measuring Oil Source 0, 0x0001 = Measuring Oil Source 1, 0x0002 = Measuring Oil Source 2, 0xFF00 = Standby, 0x00FF = Unknown (no connection with PGA) 0x00FF =Command to start/stop the measurement

1052 R 1 Scheduler Enable 0x0000 = Off, OxFF00 = On

1060 R 1 Caution Indicator 0x0000 = Off, OxFF00 = On



1061 R 1 Alarm Indicator 0x0000 = Off, OxFF00 = On

1062 R 1 Service Indicator 0x0000 = Off, OxFF00 = On

1063 R 1 Relay 2 0x0000 = Off, OxFF00 = On






1200 R/W 4 UTC Clock: Years YYYY (BCD)

1201 UTC Clock: Months, days MMDD (BCD)

1202 UTC Clock: Hours, minutes HHMM (BCD)

1203 UTC Clock: Seconds, Day of week (0-6, 0 = Sunday)

SSWW (BCD)

4000 R/W 8

Identifier string for oil source A. 16 character string.

4001

4002

4003

4004

4005

4006

4007

4008 R 1

Measurement scheduling mode for oil source A.

16-bit unsigned integer, 0 == Normal Mode, 1 == Caution Mode, 2 == Alarm Mode

4009 R/W 1 Measurement schedule for oil source A,

in normal mode. 16-bit unsigned integer LSB = 1 hour. Min = 1 hour Max = 24 hours.


in caution mode.


in alarm mode.

4050 R 3 Next measurement: years (GMT time) YYYY (BCD)

4051 R Next measurement: month, days (GMT

time) MMDD (BCD)

4052 R Next measurement: hours, minutes

(GMT time) HHMM (BCD)

4100 R 68 Record number 16-bit unsigned integer, 0x0000 to 0x7FFF

4101 Record oil source 0 = Oil source A, 1 = Oil source B, 2 = Oil source C

4102 Record date: years (GMT time) YYYY (BCD)

4103 Record date: months, days (GMT time) MMDD (BCD)

4104 Record time: hours, minutes (GMT time) HHMM (BCD)

4105 PGA firmware version Bit field (detailed below in 7.1)

4106 Host firmware version Bit field (detailed below in 7.2)

4107 Gas conc. level alarm status Bit field (detailed below in 7.3)

4108 Gas ROC alarm status Bit field (detailed below in 7.4)

4109 Transfix status Bit field (detailed below in 7.5)

4110 Measurement flags Bit field (detailed below in 7.6)

4111 PGA state (if error occurred) 16-bit unsigned integer representing PGA error state

4112 PGA error codes Bit field (detailed below in 7.7)

4113

4114 Spare registers. Read as 0x0000. Reserved for future use. Read as 0x0000.

4115



4116

Hydrogen conc.

32-bit floating point, in ppm.

4117

4118 Carbon Dioxide conc.

4119

4120 Carbon Monoxide conc.

4121

4122 Ethylene conc.

4123

4124 Ethane conc.

4125

4126 Methane conc.

4127

4128 Acetylene conc.

4129

4130 Water conc.

4131

4132 Oxygen conc.

4133

4134 Total Dissolved Combustible Gas conc.

4135

4136 Nitrogen conc.

4137

4138 Total Dissolved Gas conc.

4139

4140 Oil pressure 32-bit floating point, in kPa.

4141

4142 Oil temperature

32-bit floating point, in ºC.

4143

4144 Ambient temperature

4145

4146 Normalisation temperature

4147

4148 Analogue Input 1 (Transformer Load)

32-bit floating point, in user-defined units.

4149

4150 Analogue Input 2

4151


4153


4155


4157


4159

4160

Spare registers. Read as 0x0000. Reserved for future use. Read as 0x0000.

4161

4162

4163

4164

4165

4166

4167



4200 R 42 Record number 16-bit unsigned integer, 0x0000 to 0x7FFF

4201 Record oil source 0 = Oil source A, 1 = Oil source B, 2 = Oil source C

4202 Record date: years YYYY (BCD)

4203 Record date: months, days MMDD (BCD)

4204 Record time: hours, minutes HHMM (BCD)

4205 PGA firmware version Bit field (detailed below in 7.1)

4206 Host firmware version Bit field (detailed below in 7.2)

4207 Gas conc. level alarm status Bit field (detailed below in 7.3)

4208 Gas ROC alarm status Bit field (detailed below in 7.4)

4209 Transfix status Bit field (detailed below in 7.5)

4210 Measurement flags Bit field (detailed below in 7.6)

4211 PGA state (if error occurred) 16-bit unsigned integer representing PGA error state

4212 PGA error codes Bit field (detailed below in 7.7)

4213

4214 Spare registers. Read as 0x0000. Reserved for future use. Read as 0x0000.

4215

4216 Hydrogen conc.

16-bit unsigned integer: LSB = 1 ppm Min = 0 Max = 65535

4217 Carbon Dioxide conc.

4218 Carbon Monoxide conc.

4219 Ethylene conc.

4220 Ethane conc.

4221 Methane conc.

4222 Acetylene conc.

4223 Water conc.

4224 Oxygen conc.

4225 Total Dissolved Combustible Gas conc.

4226 Nitrogen conc.

4227 TDG (Total Dissolved Gas)

4228 Oil pressure 16-bit signed integer, LSB = ±0.1 kPa

4229 Oil temperature

16-bit signed integer, LSB = ±0.1 ºC 4230 Ambient temperature

4231 Normalisation temperature

4232 Analogue Input 1 (Transformer Load)

16-bit signed integer, user defined unit scaling.






4238

Spare registers. Read as 0x0000. Reserved for future use. Read as 0x0000. 4239

4240

4241

Registers 5000-5999 and 6000-6999 are not used in TRANSFIX.



1) The Group Size column above refers to the number of registers that must be read as a single

contiguous group, starting with the first register number in the group. 2) Some registers in the measurement record contains bit coded words: 7.1 PGA Firmware Version bits 15-12 PGA major version bits 11-8 PGA minor version bits 0-7 PGA revision 7.2 Host Firmware Version bits 15-12 Host major version bits 11-8 Host minor version bits 0-7 Host revision 7.3 Alarm Conc. Status bit 10 1 = Nitrogen (N2) limit exceeded. bit 9 1 = TDCG limit exceeded. bit 8 1 = Oxygen (O2) limit exceeded. bit 7 1 = Water (H2O) limit exceeded. bit 6 1 = Acetylene (C2H2) limit exceeded. bit 5 1 = Methane (CH4) limit exceeded. bit 4 1 = Ethane (C2H6) limit exceeded. bit 3 1 = Ethylene (C2H4) limit exceeded. bit 2 1 = Carbon Monoxide (CO) limit exceeded. bit 1 1 = Carbon Dioxide (CO2) limit exceeded. bit 0 1 = Hydrogen (H2) limit exceeded. 7.4 Alarm ROC Status bit 10 1 = Nitrogen (N2) ROC limit exceeded. bit 9 1 = TDCG ROC limit exceeded. bit 8 1 = Oxygen (O2) ROC limit exceeded. bit 7 1 = Water (H2O) ROC limit exceeded. bit 6 1 = Acetylene (C2H2) ROC limit exceeded. bit 5 1 = Methane (CH4) ROC limit exceeded. bit 4 1 = Ethane (C2H6) ROC limit exceeded. bit 3 1 = Ethylene (C2H4) ROC limit exceeded. bit 2 1 = Carbon Monoxide (CO) ROC limit exceeded. bit 1 1 = Carbon Dioxide (CO2) ROC limit exceeded. bit 0 1 = Hydrogen (H2) ROC limit exceeded. 7.5 Alarm Output Status bit 11 1 = Relay 7 Enabled bit 10 1 = Relay 6 Enabled bit 9 1 = Relay 5 Enabled bit 8 1 = Relay 4 Enabled bit 7 1 = Relay 3 Enabled bit 6 1 = Relay 2 Enabled bit 5 1 = Service Indicator On bit 4 1 = Alarm Indicator On bit 3 1 = Caution Indicator On bit 2 1 = SMS Message sent bit 1 1 = Alarm Mode Enabled bit 0 1 = Caution Mode Enabled



7.6 Measurement Flags bit 8 1 = Spurious alarm suspected bit 7 1 = Oil switch failed bit 6 1 = TDG valid bit 5 1 = Nitrogen valid bit 4 1 = Error checking disabled bit 3 1 = Sampling skipped bit 2 1 = First measurement after reset bit 1 1 = PPM values are valid bit 0 N/A 7.7 Error Codes bit 0 No error bit 1 Missing mains input bit 2 PGA power supply voltage too low bit 3 PGA chopper frequency outside range bit 4 PGA IR-source outside range bit 5 Gas flow lower than limit bit 6 Background noise/vibration too high bit 7 Microphone test failed bit 8 No levelsensor1 signal (oil level) bit 9 No Levelsensor3 signal (oil drain) bit 10 Levelsensor1 signal (oil level) bit 11 Levelsensor2 signal (oil level alert) bit 12 PGA Air temperature outside limits bit 13 Bad communication with controlboard bit 14 Gas leak test: Pump pressure too low bit 16 Gas leak test: Pressure decay too high bit 17 Oil temperature too low bit 18 Oil temperature too high bit 19 Oil pressure too low bit 20 Oil pressure too high bit 21 Oil pump tacho count too high bit 22 Oil pump pressure too low bit 23 Oil pump speed out of range bit 24 Manual oil sampling switch bit 25 Oil pump tacho count too low bit 26 Oil pump not turning

Error Codes as displayed on LCD screen 00 Missing mains input 01 PGA power supply voltage too low 02 PGA chopper frequency outside range 03 PGA IR-source outside range 04 Gas flow lower than limit 05 Background noise/vibration too high 06 Microphone test failed 07 No levelsensor1 signal (oil level) 08 No Levelsensor3 signal (oil drain) 09 Levelsensor1 signal (oil level) 10 Levelsensor2 signal (oil level alert) 11 PGA Air temperature outside limits 12 Bad communication with controlboard 13 Gas leak test: Pump pressure too low 14 Gas leak test: Pressure decay too high 16 Oil temperature too low 17 Oil temperature too high 18 Oil pressure too low 19 Oil pressure too high 20 Oil pump tacho count too high 21 Oil pump pressure too low 22 Oil pump speed out of range 23 Manual oil sampling switch 24 Oil pump tacho count too low 25 Oil pump not turning

READING HISTORICAL RECORDS

Function code: 65 (0x41)

This function is used to read a historical record from the TRANSFIX. The request PDU specifies the record index. Records are indexed, where 0 indicates the 'latest' or current record. Note that the index number is not the same as the record number. The response will contain the entire record (header and data), as described below. Note that all data is in floating point format. Integer format is not supported for historical records. If there is no record available at the current index position, an Illegal Address Exception response will be returned. In order to read all records, the master should read record 0, then record 1, etc., until it had read all the available records, or has read until it reads one it has already read previously.



Request Function code 1 byte 0x41

Record index 2 bytes 0x0000 to 0x7FFF

Response Function code 1 byte 0x41

Record 220 bytes Detailed below

Error Function code 1 byte 0xC1

Record index 1 byte Exception code 02 (Illegal Data Address)

Record Format

Field Size (bytes) Offset Type

Pu

blic

Number 2 0 16-bit unsigned integer, 0x0000 to 0x7FFF

Oil Source 2 2 0 = Oil source A, 1 = Oil source B, 2 = Oil source

C

Year 2 4 BCD, e.g. 2006

Month 1 6 BCD, 1 to 12

Day 1 7 BCD, 1 to 31

Hour 1 8 BCD, 0 to 23

Min 1 9 BCD, 0 to 59

PGA Firmware Version 2 10 Bit field (detailed below)

Host Firmware Version 2 12 Bit field (detailed below)

Alarm Conc Status 2 14 Bit field (detailed below)

Alarm ROC Status 2 16 Bit field (detailed below)

Alarm Output Status 2 18 Bit field (detailed below) (NP - changed, see

below)

Measurement Flags 2 20 Bit field (detailed below)

PGA Error State 2 22 16-bit unsigned integer representing PGA error

state

Error Codes 4 24 Enumerated type (detailed below)

Measurement Duration, sec 2 28 16-bit unsigned integer.

Spare 2 30 Reserved for future use. Read as 0x0000.

Hydrogen, H2 4 32 32-bit floating point, in ppm.

Carbon Dioxide, CO2 4 36 32-bit floating point, in ppm.

Carbon Monoxide, CO 4 40 32-bit floating point, in ppm.

Ethylene, C2H4 4 44 32-bit floating point, in ppm.

Ethane, C2H6 4 48 32-bit floating point, in ppm.

Methane, CH4 4 52 32-bit floating point, in ppm.

Acetylene, C2H2 4 56 32-bit floating point, in ppm.

Water, H2O 4 60 32-bit floating point, in ppm.

Oxygen, O2 4 64 32-bit floating point, in ppm.

TDCG 4 68 32-bit floating point, in ppm.

Nitrogen, N2 4 72 32-bit floating point, in ppm.

TDG 4 76 32-bit floating point, in ppm.

Oil Pressure 4 80 32-bit floating point, in kPa.

Oil Temperature 4 84 32-bit floating point, in ºC.

Ambient Temperature 4 88 32-bit floating point, in ºC.

Normalization Temperature 4 92 32-bit floating point, in ºC.

Analogue Input 1 4 96 32-bit floating point, in user-defined units.








Spare 16 120 Reserved for future use. Read as 0x0000.

Pri

vate

Reserved 4 136 Reserved














Spare 32 192 Reserved

CRC16 2 224 CRC16 to verify record integrity.

Total 226



APPENDIX 1. INFORMATION SCREEN DISPLAYS The following information will appear on the information screen, depending on the TRANSFIX mode. START-UP SCREEN AT POWER-UP OR AFTER RESET

MEASUREMENT START BUTTON PRESSED

MEASUREMENT STOP BUTTON PRESSED

AUTOMATIC MODE



If White pushbutton is pressed during measurement

MANUAL SAMPLING

The user can select the oil circuit to be sampled OIL SAMPLING

STANDBY MODE

Notes:

1) Measurements will be displayed for each oil source in turn as shown above. 2) AnaIn0 to AnaIn5 are analogue inputs, e.g. load sensor, and will only be displayed when

the inputs are configured. The real names of the parameters and real units will be displayed. Only configured analogue inputs will be displayed.

3) Nitrogen, TGC will be hidden if nitrogen measurement is not enabled. 4) IP address will be hidden, if Ethernet is not enabled. GSM phone screen will be hidden

if GSM modem is not fitted. 5) When in “SYSTEM FAILURE” mode, only the three upper screens are shown. The error

codes are shown on page 13.

Documents

Transfix User Guide