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S7 - OPEN MODBUS _TCP Communication Between Siemens & GE PLC

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    S7 - OPEN MODBUS / TCP Communication between Siemens & GE PLC Contents Project Details ............................................................................................................................................... 2 Getting Started .............................................................................................................................................. 3 Commissioning .............................................................................................................................................. 4 Parameterization of Modbus Communication ............................................................................................. 6 Testing ......................................................................................................................................................... 11  Project Details    Hardware S7 PLC: CPU 315-2 PN/DP 6ES7 315-2EH14-0AB0 V3.2 GE PLC You can find the latest hardware prerequisites on the internet: http://w3.siemens.com/mcms/human-machine-interface/en/customized-products/customized-software/Pages/default.aspx?tabcardname=simatic%20modbus/tcp.     Software The usage of the FB MODBUSPN is possible with STEP7 Version 5.4 SP4 or higher. 1.   The FB MODBUSPN requires 6048 byte work memory and 7294 byte load memory. 2.   The FB MOD_CLI requires 11184 byte work memory and 12054 byte load memory. 3.   The FB MOD_SERV requires 10660 byte work memory and 11452 byte load memory. 4.   The FB TCP_COMM requires 1880 byte work memory and 2224 byte load memory.  Getting Started    Procedure 1.   Install “OpenModbusTCP PN CPU“  and insert the Modbus function blocks into your SIMATIC project. 2.   Parameterize the connection parameters regarding your requirements (IP-address, port number, etc.). 3.   Parameterize the Parameter-DBs MODBUS_PARAM regarding your requirements (client/server, connect at start-up, register numbers, DB numbers, etc.). 4.   Call the Modbus block FB102 in the required OBs. 5.   Parameterize the Modbus block for initialization and runtime. 6.   Load the user program into the PLC and license the Modbus block for this CPU. For Step 2 and 3 used Run Modbus TCP Wizard and set all parameter  Commissioning    Installing Library The attached CD contains a setup which installs the library “Modbus_PN_CPU”, the sample projects and the manuals in English and German in the corresponding STEP7 directories. Or Use Sarla tested backup “ Ldc_Modbus_20112015_testedok. Zip” File  Follow Following Steps by using Sarla Tested backup In Sample Project S7 PLC: Master (Client) and GE PLC: Slave (Server) 1.   Create S7 project. 2.   Copy and Paste OB, FB’s, FC’s and DB’s from Tested sample project.   In Tested project following IP used for Controllers S7 PLC: 192.168.2.105 GE PLC: 192.168.2.110
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