I have a process automation network comprising in 5 valves and 3 flow counting units which communicate with a S7-300 PLC through a Modbus interface. Data from the valves is input coil. Data from the flow counting units is holding register. Data from the flow counting units is read from several starting addresses. The PLC has a CP341 communication processor. I need a projects that implements the communication between the s7-300 PLC (acting as a Mobus Master) and the presented multiple slaves, considering using functions codes 03 and 02. The project will be compatible with TIA Portal V13.
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Salam alikom,easy task to finish ,It could be a good opportunity to introduce my company and my finished projects to you.I can make a free site visit if your site is in egypt as it is first time to deal with you .
I'm very experience using S7-300 with Step 7 and TIA Portal v13 SP1. For Communication S7-300 with Modbus Interface you need CP341 RS422/485 and Loadable Driver for Modbus Master.