I am trying to connect to a Chiller through Modbus TCP that has been setup as a Modbus slave and I see the Rockwell AOI and it looks pretty straightforward for connecting. The question I have is in the Data tags in Control Logix that get auto created Like Client_01_Data.HoldRegisters_4xxx[0] - Client_Data.HoldRegisters.4xxx[1023] are the array tags. The Chiller Manufacturer provided the tag mapping for their system, but they are in storage locations 401201:401202, etc. I am assuming I need to access 1207 and 1208 to get my data I need to display in the Rockwell PLC, but the array only goes up to 1023? I my missing something here? How would I access addresses above 1023? I haven't actually tried to connect yet as the system is still being built and sent to our facility, but I am trying to setup my program prior to arrival.