Summary :
PACSystems RX3i, Series 90-30 - Both Series 90-30 (IC693CMM321 and PLUS CPUs) and PACSystems Rx3i Ethernet interfaces are enabled with Modbus/TCP server capabilities.
Created Date :
10/12/2025
Last Published Date :
10/23/2025
Description
Both S9030 (IC693CMM321 and PLUS CPUs) and Rx3i allow to be configured as Modbus TCP Server. So, a translation between the PLC memory and Modbus memory is required for the Modbus TCP client can access properly to the memory areas.
This information might be required in case of S9030 to Rx3i migrations.
Resolution
This is the Rx3i Modbus Reference Mapping (extracted from GFK-2224, Chapter Modbus/TCP Server)
This the S9030 Modbus Reference Mapping for PLUS CPUs, (extracted from GFK-2382, Chapter Modbus/TCP Server)
This the S9030 Modbus Reference Mapping for IC693CMM321 (extracted from GFK-1541, Appendix: Translating PLC CPU Reference Addresses to Modbus Register Addresses for the IC693CMM321)