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We have an IBM computer communicating with a PLC3. The PLC3 is a slave to the IBM. The IBM reads and writes registers to a single file within the PLC over an RS232 DF1 communications link.
If we were to change the PLC to either a PLC5 or ControlLogix but keep the communications configuration the same including the PLC file number, would any changes need to be made to the IBM?
In other words are there any changes in communications protocol between the three PLCs?
If we were to change the PLC to either a PLC5 or ControlLogix but keep the communications configuration the same including the PLC file number, would any changes need to be made to the IBM?
In other words are there any changes in communications protocol between the three PLCs?