marsu1821 Posted April 22, 2005 Report Posted April 22, 2005 Anybody could explain what is the difference between S7 200 cable and S7 300 cable for S7 Siemens PLC? I know these two cables must convert data signals from computer (RS232) to PLC (RS485) in order to program PLC...but I don't understand why they are different in the catalog... Thank you for advance Quote
Crossbow Posted April 22, 2005 Report Posted April 22, 2005 The S7-200 uses the PPI communication protocol, which is point to point. The S7-300 uses MPI which is multi-point. Different cables to talk different languages. Quote
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