AC800M Modbus TCP comm with Siemens S7-400 not working
I have set up a communication between AC800M (master) and Siemens S7-400 PLC.
The MBTCPConnect Valid = true.
Parameters of CI867 are:
Modbus slave enabled = false (is this correct, the CI867 is master to the modbus slaves on the modbus tcp network)
Default gateway = (nothing filled in)
I use one MBTCPRead with 5 dint values and use start address %IW10#1000.
I assume this should return me the values of Input registers 1000 - 1004?
Is this correct?
The MBTCPRead Status = 0, which means "pending". What does pending mean?
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Use search function for "CI867" and probably you can find answer quicklier compare to waiting for response.