Getting Started - Commissioning a CPU 31xC: Point-to-point

� Getting Started - Commissioning a CPU

31xC: Point-to- �point link

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SIMATIC

S7-300 Getting Started - Commissioning a CPU 31xC: Point-to-point link

Getting Started

08/2011 A5E00105535-03

Introduction 1

Preparation 2

Learning units 3

Further Information 4

Legal information

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Proper use of Siemens products Note the following:

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

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A5E00105535-03 Ⓟ 09/2011

Copyright © Siemens AG 2011. Technical data subject to change

Getting Started - Commissioning a CPU 31xC: Point-to-point link Getting Started, 08/2011, A5E00105535-03 3

Table of contents

1 Introduction................................................................................................................................................ 5

2 Preparation ................................................................................................................................................ 7

3 Learning units .......................................................................................................................................... 11

3.1 1. Step: Installing the sample project...........................................................................................11

3.2 2. Step: Setting parameters .........................................................................................................12

3.3 3. Step: Linking to the user program............................................................................................13

3.4 4. Step: Trial run ..........................................................................................................................14

4 Further Information .................................................................................................................................. 15

Table of contents

Getting Started - Commissioning a CPU 31xC: Point-to-point link 4 Getting Started, 08/2011, A5E00105535-03


Introduction 1

Contents of this Getting Started Manual The sample in this Getting Started manual takes you through four steps, showing you how to commission a fully functional application. You are going to familiarize yourself with the basic hardware and software functions and learn how to transfer data via a serial interface.

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

Introduction



Preparation 2

Scope These instructions apply to the following CPUs:

CPU SIMATIC Micro Memory Card

required for operation? As of firmware version

313C-2 PtP yes V3.3 314C-2 PtP yes V3.3

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

Requirements ● You have installed two S7 300 stations consisting of a power supply module and a

CPU 31xC-2 PtP. The stations are connected via a serial connection with the 15-pin sub-D socket on the right.

● STEP 7 as of V5.5 + SP1 or STEP 7 as of V5.3 + SP2 with HSP 204 is correctly installed on your PG.

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

● You have set up a project for each S7 300 station.

● The PG is connected to the CPU to be commissioned.

● You have set up your stations for serial data transfer and connected them via the PtP interface. Below is a selection of the patch cords available for connecting the stations:

Type Order number X27 (RS 422), 5 m 6ES7902-3AB00-0AA0 X27 (RS 422), 10 m 6ES7902-3AC00-0AA0 X27 (RS 422), 50 m 6ES7902-3AG00-0AA0

http://support.automation.siemens.com/WW/view/en/13008499�

Preparation


Note

Information on how to produce the patch cord yourself can be found in section 6.10.7 of the Technological Functions (http://support.automation.siemens.com/WW/view/en/12429336) operating instructions.

● 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 and regulations, which depend on its field of application. Please make sure that you adhere to the applicable safety and accident prevention regulations, for example IEC 204 (emergency stop systems).

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

Ensure the S7-300 is completely disconnected before wiring!

You can come into contact with live wires if the PS 307 power supply module is turned on or the PS power supply cable is connected to the main power supply.

http://support.automation.siemens.com/WW/view/en/12429336�

Preparation


Layout of the example

2 3

7

1

56 4

① Power supply ON/OFF ② Mode selector ③ Mounting rail ④ Connecting cable between the communication partners ⑤ Programming device with STEP 7 software ⑥ Connecting cable ⑦ Clamp for strain relief

Figure 2-1 Overview of sample layout

Preparation



Learning units 33.1 1. Step: Installing the sample project

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

Installing from CD 1. 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.

Learning units 3.2 2. Step: Setting parameters


3.2 2. Step: Setting parameters

Procedure Create a project with the two stations and assign identical parameters for the PtP interface of each CPU.

Note

Select different addresses for the MPI interface so that a link to the MPI is also possible.

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 for the CPU of the relevant station.

3. Double-click on the submodule "PtP".

The "PtP properties" dialog opens.

4. Select the "ASCII" protocol.

5. Apply the default settings in the parameter assignment screens by clicking "OK":

– 9600 bps, 8 data bits, 1 stop bit, even parity.

6. Confirm your settings with "OK".

The "PtP properties" dialog closes.

7. Save your configuration to your project with "Station > Save and compile".

Your changes are now stored in your project.

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

The data are downloaded from the PG to the relevant CPU.

9. Close HW Config with "Station > Close".

You are returned to SIMATIC Manager.

Learning units 3.3 3. Step: Linking to the user program


3.3 3. Step: Linking to the user program

Procedure Transfer the user program to both stations. Proceed as follows for each station:

1. Open the project "ZDt26_01_TF_____31xC_PtPP" 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 station "CPU 31xC ASCII".

Your station is opened.

3. Open the S7 program of the CPU for this station. Double-click on the "Blocks" container.

All blocks of the S7 program are displayed.

4. Copy all blocks to the "Blocks" folder of each station in your project under "SIMATIC 300 Station > CPU 3xx > S7 Program > Blocks". Do not copy the system data.

Block Name (in the toolbar) Description OB 1 CYCLE Cyclic program processing OB 100 RESTART Startup processing restart DB 21 SEND IDB Instance DB for SEND_PTP SFB DB 22 RCV IDB Instance DB for RCV_PTP SFB DB 40 SEND WORK DB Work DB for SEND_PTP SFB DB 41 RCV WORK DB Work DB for RCV_PTP SFB DB 42 SEND SRC DB Send DB DB 43 RCV DST DB Receive DB SFB 60 SEND_PTP Send SFB for data SFB 61 RCV_PTP Receive SFB for data FB 21 SEND Sending Data FB 22 RECEIVE Receiving Data VAT1 - VAT1

5. In SIMATIC Manager, select the blocks folder of the target CPU under "SIMATIC 300 Station > CPU 3xx > S7 Program > Blocks" and make sure that the PG is connected to the CPU in question.

All blocks of the S7 program are displayed.

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

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

Learning units 3.4 4. Step: Trial run


3.4 4. Step: Trial run

Procedure 1. In the "Blocks" directory, double-click on the variable table "VAT1" in your project. 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 currently monitored is set to "STOP" mode.

3. Activate monitoring with "Variable > Monitor".

The current values of the addresses are displayed in the "Status Value" column.

4. Switch both CPUs to RUN.

At the bottom right, you will see that the CPU monitored is set to "RUN" mode. Data transfer is started. You can view the number of transmissions at the operand "DB42.DBW0" (send counter). You can view the number of items of data received at the operand "DB41.DBW18" (receive counter).


Further Information 4

Diagnostics/Correction of Errors Incorrect operator input, faulty wiring of the serial interface or inconsistent configuration data may lead to errors.

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

Example: The "ZEn26_01_TF_____31xC_PtP" project contains further samples you can use for orientation. You can customize all samples according to your personal applications.

Further Information


Documents

Getting Started - Commissioning a CPU 31xC: Point-to-point