S7-300 First Steps in Commissioning CPU 31xC Positioning With Digital Output

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First Steps in Commissioning CPU1xC: Positioning with digital output

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SIMATICS7-300First Steps in Commissioning CPU 31xC:Positioning with digital outputGetting Started

08/2011A5E00105533-03

Introduction 1

Preparation 2

Learning units 3

Further Information 4


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Legal informationLegal informationWarning notice system

This manual contains notices you have to observe in order to ensure your personal safety, as well as to preventdamage to property. The notices referring to your personal safety are highlighted in the manual by a safety alertsymbol, notices referring only to property damage have no safety alert symbol. These notices shown below aregraded according to the degree of danger.

DANGERindicates that death or severe personal injury will result if proper precautions are not taken.

WARNINGindicates that death or severe personal injury may result if proper precautions are not taken.

CAUTIONwith a safety alert symbol, indicates that minor personal injury can result if proper precautions are not taken.

CAUTIONwithout a safety alert symbol, indicates that property damage can result if proper precautions are not taken.

NOTICEindicates that an unintended result or situation can occur if the relevant information is not taken into account.

If more than one degree of danger is present, the warning notice representing the highest degree of danger willbe used. A notice warning of injury to persons with a safety alert symbol may also include a warning relating toproperty damage.

Qualified PersonnelThe product/system described in this documentation may be operated only by personnel qualified for the specifictask in accordance with the relevant documentation, in particular its warning notices and safety instructions.Qualified personnel are those who, based on their training and experience, are capable of identifying risks andavoiding potential hazards when working with these products/systems.

Proper use of Siemens productsNote the following:

WARNINGSiemens products may only be used for the applications described in the catalog and in the relevant technicaldocumentation. If products and components from other manufacturers are used, these must be recommendedor approved by Siemens. Proper transport, storage, installation, assembly, commissioning, operation andmaintenance are required to ensure that the products operate safely and without any problems. The permissibleambient conditions must be complied with. The information in the relevant documentation must be observed.

TrademarksAll names identified by are registered trademarks of Siemens AG. The remaining trademarks in this publicationmay be trademarks whose use by third parties for their own purposes could violate the rights of the owner.

Disclaimer of LiabilityWe have reviewed the contents of this publication to ensure consistency with the hardware and softwaredescribed. Since variance cannot be precluded entirely, we cannot guarantee full consistency. However, theinformation in this publication is reviewed regularly and any necessary corrections are included in subsequenteditions.

Siemens AGIndustry SectorPostfach 48 48

90026 NRNBERGGERMANY

A5E00105533-03 09/2011

Copyright Siemens AG 2011.Technical data subject to change


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First Steps in Commissioning CPU 31xC: Positioning with digital output

Getting Started, 08/2011, A5E00105533-03 3

Table of contents

1 Introduction................................................................................................................................................ 52 Preparation................................................................................................................................................ 73 Learning units .......................................................................................................................................... 11

3.1 1. Step: Wire the CPU..................................................................................................................11

3.2 2. Step: Installing the sample project ...........................................................................................14

3.3 3. Step: Setting parameters .........................................................................................................15

3.4 4. Step: Linking blocks to the user program ................................................................................163.5 5. Step: Carrying out a dry run.....................................................................................................17

4 Further Information.................................................................................................................................. 19


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Table of contents


4 Getting Started, 08/2011, A5E00105533-03


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Introduction 1

Contents of this Getting Started ManualBased on a concrete example, this Getting Started manual takes you through fivecommissioning steps to the point where you have a functioning traversing movement. Youwill get to know certain basic hardware and software functions and will calculate and checkthe application-dependent parameters in this sample.

This process will take one to two hours, depending on your experience.


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Introduction




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Preparation 2

ScopeThese instructions apply to the following CPUs:

CPU SIMATIC Micro Memory Cardrequired for operation?

As of firmwareversion

314C-2 DP yes V3.3

314C-2 PtP yes V3.3314C-2 PN/DP yes V3.3

The order number can be found in the manuals, e.g. the operating instructions CPU 31xCand CPU 31x: Installation (http://support.automation.siemens.com/WW/view/en/13008499).
http://support.automation.siemens.com/WW/view/en/13008499http://support.automation.siemens.com/WW/view/en/13008499


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Preparation



Requirements You have an S7 300 station consisting of a power supply module and a CPU 314C-2 PtP,

314C-2 DP or 314C-2 PN/DP. STEP 7 is correctly installed on your PG.

The table below shows the STEP 7 version you need for each CPU.

CPU STEP 7 version314C-2 PtP STEP 7 as of V5.5 + SP1 or STEP 7 as of V5.3 + SP2 with HSP 204

314C-2 DP STEP 7 as of V5.5 + SP1 or STEP 7 as of V5.3 + SP2 with HSP 203

314C-2 PN/DP STEP 7 as of V5.5 with HSP 191

You have downloaded the sample projects from the Internet or have the CD of sampleprojects included with the Technological Functions operating instructions.

You have set up a project for the S7-300 station. The PG is connected to the CPU. You have an external 24 V DC power supply, an encoder, a drive, and the necessary

accessories, such as a front connector and wiring material.

You provided hardware limit switches and EMERGENCY-OFF switches for safe andreliable operation of the system.

The CPU is correctly connected to a power supply.WARNING

Operation of an S7-300 as part of plants or systems is subject to special rules andregulations, which depend on its field of application.

Please make sure that you adhere to the applicable safety and accident preventionregulations, for example IEC 204 (emergency stop systems).

You risk severe injury, or damage to machines and equipment if you ignore theseregulations.


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Preparation



Layout of the example2 3

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Setting of supply voltage

Mode selector Mounting rail Programming device with STEP 7 software PG cable Connecting cable Clamp for strain relief

Figure 2-1 Overview of sample layout


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Preparation




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Learning units 33.1 1. Step: Wire the CPU

WARNINGYou can come into contact with live wires if the PS 307 power supply module is turned onor the PS power supply cable is connected to the main power supply. Ensure the S7-300 iscompletely disconnected before wiring!

Procedure1. Connect the wired front connector to the CPU.2. Fasten the connector.3. Connect the power supply for the digital inputs and digital outputs:

24 V to X2, pins 1 and 31 Ground to X2, pins 20 and 40

4. Connect the incremental encoder to the 24 V power supply.5. Connect the encoder signals (X2, pins 2 to 4).

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6. Connect the relay circuit to the power supply.


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Learning units

3.1 1. Step: Wire the CPU



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8. Strip the insulation from the shielded cables.9. Clamp the cable shield into the shield connection element. using the shield terminal

elements.


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Learning units

3.1 1. Step: Wire the CPU



Connector pin assignmentThe pin assignments described below relate only to the connections relevant for the

positioning type.

Table 3- 1 CONNECTOR X2

Pin Name/address Function1 1 L+ 24 V power supply of the inputs

2 DI + 0.0 Encoder signal A

3 DI + 0.1 Encoder signal B

4 DI + 0.2 Encoder signal N

5 DI + 0.3 Length measurement

6 DI + 0.4 Reference point switch

20 1 M Ground

31 3 L+ 24 V power supply of the outputs

32 DO + 1.0 Digital output Q0




40 3 M Ground

ReferenceYou will find information on the remaining connections in the documentation of the S7-300.


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Learning units

3.2 2. Step: Installing the sample project



3.2 2. Step: Installing the sample projectIntroduction

When installing the sample project, you have the following options:

Installing from CD1. Take the CD out of the Technological Functions operating instructions.2. Start the installation program on the CD by double-clicking on the SETUP.EXE file in the

SETUP folder.

The installation program is started.

3. Now follow the instructions in the installation program.Installing from the Internet

1. Open the directory with the sample projects.2. Start the installation program by double-clicking the SETUP.EXE file.

The installation program is started.

3. Now follow the instructions in the installation program.


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Learning units

3.3 3. Step: Setting parameters



3.3 3. Step: Setting parametersProcedure

1. Open your project in SIMATIC Manager.A window, divided into two sections, opens showing the title of your project.

2. In your project, call the configuration table HW Config.

3. Double-click on the submodule "Positioning".The "Positioning properties" dialog opens.

4. Select "Positioning with digital outputs".5. On the drive, axis and encoder tabs, customize the settings according to your system.6. Confirm your settings with "OK".

The "Positioning properties" dialog closes.

NoteThe input and output address of the submodules "DI24/DO16", "AI5/02", "Counting" and"Positioning" must be adapted for the example to function correctly.

Double-click the relevant line to adapt the submodule. A dialog opens. Select the"Addresses" tab in each case. Deselect the "System default" checkboxes. Change theaddresses as follows:

DI24/DO16: Inputs: 124..126, Outputs: 124..125 AI5/AO2: Inputs: 752..761, Outputs: 752..755 Counting: Inputs: 768..783, Outputs: 768..783 Positioning: Inputs: 784..799, Outputs: 784..799Confirm your settings with "OK".

7. Save your configuration to your project with "Station > Save and compile".Your changes are now stored in your project.


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Learning units

3.4 4. Step: Linking blocks to the user program



8. When the CPU is in STOP, select "PLC > Download to module ..." to download theconfiguration.

The data are now downloaded from the PG to the CPU.9. Close HW Config with "Station > Close".

You are returned to SIMATIC Manager.

3.4 4. Step: Linking blocks to the user programProcedure

1. Open the project "ZDt26_03_TF_____31xC_Pos" in the catalog ...\Siemens\STEP7\Examples via "File > Open ... > Sample projects" in SIMATIC Manager.

A window, divided into two sections, opens showing the title of the project.

2. Double-click on the S7 program "Digital 1 First Steps".The "Sources", "Blocks" and "Symbols" folders are displayed in the right-hand window.

3. Double-click on the "Blocks" container.All blocks of the S7 program are displayed.

4. Copy all blocks from this folder to your project under "SIMATIC 300 Station > CPU 3xx >S7 Program > Blocks".

Block Name (in the toolbar) DescriptionOB 1 CYCLE_EXC Cyclic program

OB 100* COMPLETE RESTART Complete restart: Reset the control signals

FC 1 GETST_A Getting Started DIGITAL

SFB 46 DIGITAL System function block POS DIGITAL

DB 6 DI_DIGITAL Instance DB for the SFB DIGITAL

VAT_GETST_A VAT_GETST_A Variable table

* Adjust the values for the switchover and shutdown difference in the block COMPLETERESTART (OB 100).

5. In SIMATIC Manager, select "SIMATIC 300 Station > CPU 3xx > S7 Program > Blocks".All blocks of the S7 program are displayed.

6. Download all of the S7 blocks it contains via "PLC > Download to your CPU" (CPU inSTOP mode).

The program and configuration are downloaded from the PG to the CPU.


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Learning units

3.5 5. Step: Carrying out a dry run



3.5 5. Step: Carrying out a dry runProcedure

1. In the "Blocks" directory, double-click on the variable table "VAT_GETST_d" in yourproject.

The variable table for monitoring and modifying is displayed.

2. Go online with "PLC > Connect to > Configured CPU".At the bottom right, you will see that the CPU is set to "STOP" mode.

3. Activate monitoring with "Variable > Monitor".The current values of the addresses are displayed in the "Status Value" column.

CAUTIONThe next two test steps start the drive.

You can stop the drive in one of the following ways:

Set the control value for the direction to 0 again and activate it Set the control value for the drive enable to 0 again and activate it Change the CPU to STOP

4. Switch the CPU to RUN.At the bottom right, you will see that the CPU is set to "RUN" mode.

5. Try out the two following experiments. With "Variable > Activate Modify Values", you canmake the control values valid.

"Jogging" modeMake the following settings:

MODE_IN = 1:Select "Jogging" mode

DRV_EN = 1:drive enable

SPEED:

Speed: 0 = Creep speed, 1 = Rapid traverseStarting the drive:DIR_P = 1: Jogging in plus directionDIR_M = 1: Jogging in minus direction

Note: If both variables DIR_P and DIR_M areactivated, no positioning is possible.

You can monitor the following signal statuses inthe column "Status Value":

ST_ENBL = 1:Start enable

MOD_OUT = 1:Current mode "Jogging"

WORKING = 1:

Travel activeACT_POS:Current actual position


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Learning units

3.5 5. Step: Carrying out a dry run



"Incremental approach, relative" modeMake the following settings:

MODE_IN = 4:Select "Incremental approach, relative" mode

DRV_EN = 1:drive enable

TARGET:Distance in pulses

SPEED:Speed: 0 = Creep speed, 1 = Rapid traverse

Start drive:DIR_P = 1: Incremental approach, relative in plusdirectionDIR_M = 1: Incremental approach, relative inminus direction

You can monitor the following signal statuses in

the column "Status Value":ST_ENBL = 1:Start enable

MOD_OUT = 4:Current mode "Incremental approach, relative"

WORKING = 1:Travel active

ACT_POS:Current actual position

POS_RCD = 1:Position reached


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Further Information 4

Diagnostics/Correction of ErrorsIncorrect operator input, faulty wiring or inconsistent configuration data may lead to errors.

For information on how to analyze such errors and messages, refer to the S7-300documentation.

Example:The "ZEn26_03_TF_____31xC_Pos" project contains further samples you can use fororientation. You can customize all samples according to your personal applications.


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Further Information



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S7-300 First Steps in Commissioning CPU 31xC Positioning With Digital Output