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PAC with Modbus: What addresses for tags?

Modbus slave outputs (read only) automatically start at address 30001.

Modbus slave inputs (read/write) automatically start at address 40001.

Bit can then be .0 through .15

The above Modbus Master is a Parker Interact Xpress HMI and shows the Interact Xpress Manager tag setup. The PAC is the Modbus slave.

In the PAC software:

Note the memory address  (ie %IE23) offset can be ignored. These are automatically mapped to 30001 and 40001 per Modbus.


keywords: variables, ModbusTCP