![]() To use the Modbus slave instructions in your S7-200 program, follow these steps: 1. SIMATIC S7 library with the relevant MODBUS block. Read Digital Input Data From Modbus Slave S7 200 PLC. If this tool cant be used with CPU 224xp, is there any tool to do that. I found a tool here in the forums for testing the modbus communications, but its for **OPEN MODBUS / TCP Communication via CP343-1 and CP443-1**, is it adifferent protocol, can I use it with S7-200 CPU 224xp. Any one can help me with that, Does any one have sample programs using the modbus can share it. ![]() ![]() I must recieve from the PDMS about 10 control points. Memory locations (regesters I use them in my control and I must inform the PDMS about them). ![]()
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