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Hi,
I'm writing an HMI application for a system with a Siemens S7 PLC, Siemens AFD's, and several encoders, all of which are connected to a Profibus DP network. My questions is this. Should the HMI connect as a Profibus slave, Master 2, or use the Siemens MPI protocol? The function of the HMI is monitoring PLC data, getting diagnostics from the PLC, Drives, and encoders, and Writing some data to the PLC. Thanks for any help.
I'm writing an HMI application for a system with a Siemens S7 PLC, Siemens AFD's, and several encoders, all of which are connected to a Profibus DP network. My questions is this. Should the HMI connect as a Profibus slave, Master 2, or use the Siemens MPI protocol? The function of the HMI is monitoring PLC data, getting diagnostics from the PLC, Drives, and encoders, and Writing some data to the PLC. Thanks for any help.