Cover. Configuration of an IM 308-C as DP Slave to a CP as DP Master PROFIBUS DP. FAQ July Service & Support. Answers for industry.

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1 Cover Configuration of an IM 308-C as DP Slave to a CP as DP Master PROFIBUS DP FAQ July 2010 Service & Support Answers for industry.

2 Question This entry is from the Service&Support portal of Siemens AG, Sector Industry, Industry Automation and Drive Technologies. The general terms of use ( apply. Clicking the link below directly displays the download page of this document. Question How do you configure an IM 308-C as DP slave to a CP as DP master? Answer The instructions and notes listed in this document provide a detailed answer to this question. 2 V1.1, Item ID:

3 Table of contents Table of contents 1 Configuration of the IM 308-C as DP Slave in COM PROFIBUS V Configuration of the CP342-5 as DP Master S7 Program in the DP Master Parameterization of FC1 "DP_SEND" Parameterization of FC2 "DP_RECV" V1.1, Item ID:

4 1 Configuration of the IM 308-C as DP Slave in COM PROFIBUS V5.1 1 Configuration of the IM 308-C as DP Slave in COM PROFIBUS V5.1 This example shows how to configure an IM 308-C as DP slave to a CP as DP master. Proceed as follows to configure IM 308-C as DP slave. Table Create a default master system in COM PROFIBUS. In the catalog, under DP Master > Default Master, double-click on the "Default Host" object. 2. In the catalog, under "DP Slave > PLC > SIMATIC > IM 308-C DP-Slave", double-click on the CPU used. In this example we use the S5-135U / CPU 928. Then double-click on the "IM 308-C DP- Slave" station type on the default master system to open the "Slave properties" dialog. Stationstyp: IM 308-C DP-Slave 4 V1.1, Item ID:

5 1 Configuration of the IM 308-C as DP Slave in COM PROFIBUS V In the "Slave properties" dialog you click on the "Configure" button to define the input and output addresses for the DP slave. 4. In the "Configure: IM 308-C DP Slave" dialog you click on the "Module..." button to select the modules for the input and output areas. In this example, the following modules are selected: 1 byte DI/consistency 1 byte with the identifier 8DI 1 byte DQ/consistency 1 byte with the identifier 8DQ 5. Select the I address field or Q address field of the modules added. Enter the I address or Q address or click on the "Auto Address" button to assign the I address and Q address automatically. 6. Double-click on the "IM 308-C" station type on the default master system to open the "Master parameters" dialog. Stationstyp: IM 308-C 7. In the "Slave properties" dialog you click on the "Configure" button to define the input and output addresses for data exchange with the S7 CPU. V1.1, Item ID:

6 1 Configuration of the IM 308-C as DP Slave in COM PROFIBUS V Select the I address field or Q address field of the modules added. Enter the I or Q address. 9. In the "Configure" menu, you select the "Set bus parameters..." item to open the "Bus Parameters" dialog and configure the bus parameters, bus profile and baud rate, for example. 10. In this example, the following bus parameters are set: Bus profile: PROFIBUS DP Baud rate: 1500 Kbaud 11. Mark the "IM 308-C" station type on the default master system and transfer the configuration to the memory card via the menu "File > Export > Memory Card...". NOTE It s not allowed to use the E/A addresses in the S5 rack twice, i.e. the E/A addresses, which are configured in this example, must not be glazed by additional used E/A modules. 6 V1.1, Item ID:

7 2 Configuration of the CP342-5 as DP Master 2 Configuration of the CP342-5 as DP Master Table 2-1 In the example, a CP342-5 is configured as DP master. Please follow the instructions below for configuring the CP342-5 as DP master. 1. In the SIMATIC Manager, you create a new STEP 7 project via the menu "File > New". 2. Add a SIMATIC -300 station via the menu "Insert > Station". 3. Mark the SIMATIC 300 station "SIMATIC 300(1)". Then double-click on Hardware to open the Hardware Configuration of the SIMATIC 300 station. 4. In the Hardware Catalog, under SIMATIC 300, select the mounting channel, the appropriate CPU and the CP342-5 and drag-and-drop them into the Hardware Configuration. Double-click on the CP342-5 to open the Properties dialog of the CP drag & drop V1.1, Item ID:

8 2 Configuration of the CP342-5 as DP Master 5. In the Properties dialog of the CP342-5, select the "Operating Mode" tab and then select "DP Master". 6. Select the "General" tab in the Properties dialog box of the CP342-5 and click on the "Properties" button. 7. Specify a PROFIBUS address for the CP342-5 and assign a PROFIBUS subnetwork to the CP Click on the "Properties" button. 8 V1.1, Item ID:

9 2 Configuration of the CP342-5 as DP Master 8. Go to the "Network Settings" tab, select the bus profile and the baud rate as in the configuration in COM PROFIBUS. In this example, the following network settings are selected: Baud rate: 1.5 Mbit/s Profile: DP 9. In the Hardware Catalog, under PROFIBUS DP > SIMATIC, select the IM 308-C DP slave and drag-and-drop it into the DP master system of the CP The Properties dialog of the DP slave opens automatically. drag & drop 10. In the Properties dialog of the DP slave select the "Parameters" tab and enter the PROFIBUS- address of the IM 308- C DP slave. 11. Mark the DP slave connected to the DP master system and drag-and-drop the universal module to slot 0. Double-click on the universal module to define the input address, the length, the unit and the consistency. drag & drop V1.1, Item ID:

10 2 Configuration of the CP342-5 as DP Master 12. For I/O type select the "Input" item. Enter the start address, length, unit and consistency for the input. In this example the input is configured like this: Start address = 0 Length = 1 Unit = Byte Consistent over: Unit 13. Mark the DP slave connected to the DP master system and drag-and-drop another universal module to slot 1. Double-click on the universal module to define the output address, the length, the unit and the consistency. drag & drop 14. For I/O type select the "Output" item. Enter the start address, length, unit and consistency for the output. In this example the output is configured like this: Start address = 0 Length = 1 Unit = Byte Consistent over: Unit 15. Save and compile the hardware configuration of the S7-300 station. Load the configuration into the CPU. laden speichern und übersetzen 10 V1.1, Item ID:

11 3 S7 Program in the DP Master 3 S7 Program in the DP Master The CP342-5 always transfers the data consistently. For data exchange via PROFIBUS you call functions FC1 "DP_SEND" and FC2 "DP_RECV" in the user program of the CPU. Functions FC1 and FC2 are available in the SIMATIC_NET_CP > CP 300 > Blocks library. Parameterization of FC1 "DP_SEND" The FC1 "DP_SEND" transfers the data of a specified DP output area to the CP342-5 for output to the DP slave. In this example the outputdata is configured with start address 0 and a length of 1 byte (see Figure 3-1). The total length of the address area of the output data and the DP output area is 1 byte. Figure 3-1 At the input parameter CPLADDR of FC1, you specify the module start address. You take the module start address from the Hardware Configuration of the S7-300 station. In the Hardware Configuration you open the Properties dialog of the CP The module start address is defined in the "Addresses" tab (see Figure 3-2). V1.1, Item ID:

12 3 S7 Program in the DP Master Figure 3-2 Baugruppen-Anfangsadresse 256 (dez) = 100 (hex) At the SEND input parameter of FC1 you specify the address and length of the DP output area in which the send data will be stored. The length of the DP output area must be at least as long as the total length of the address area of the output data. In this example, the FC1 "DP_SEND" transfers the 1 byte from the DB1 as of address 0 to the DP output area for transfer to the DP slave. Figure 3-3 Baugruppen- Anfangsadresse DP- Ausgabebereich zur Übertragung an den DP- Slave Parameterization of FC2 "DP_RECV" FC2 "DP_RECV" reads the process data of the DP slave into the DP input area specified. In this example the input data is configured with start address 0 and a length of 1 byte (see Figure 3-1). The total length of the address area of the input data and the DP input area is 1 byte. At the input parameter CPLADDR of FC2, you specify the module start address. You take the module start address from the Hardware Configuration of the S7-300 station. In the Hardware Configuration you open the Properties dialog of the CP The module start address is defined in the "Addresses" tab (see Figure 3-2). At the RECV input parameter of FC2 you specify the address and length of the DP input area in which the received data will be stored. The length of the DP input area must be at least as long as the total length of the address area of the input data. 12 V1.1, Item ID:

13 3 S7 Program in the DP Master In this example, FC2 "DP_RECV" reads 1 byte from the DP input area into DB2 as of address 1. Figure 3-4 Baugruppen- Anfangsadresse DP- Eingabebereich V1.1, Item ID:

FAQ Communication over PROFIBUS

FAQ Communication over PROFIBUS Communication over PROFIBUS FAQ Table of Contents Table of Contents... 2 Question...2 How do I configure a PC station as DP Slave interfacing to a S7 station (as DP Master)