I am communicating to a GE 9030 PLC over the new Modbus TCP driver. The driver errors and disconnects when trying to read any Register (%R) address above 432767.
The GE 9030 register addresses (%R00001-%R32640) are mapped into the Modbus register table from address (4xxxxx) 429185-461824. I believe the driver needs to be able to accomodate register addresses up to 65535 (ie. 465535 andnd 365535).
Also, when reading any register in the 9030 or later PAC3 the Modbus address is off by one. Is there anyway to configure an address offset or configure it to be zero based?
GE9030 Modbus Address Reference.pdf (48.8 KB)