I am trying a MODBUS communication between RS485 device and Experion DCS via Systech terminal server and MODBUS Channel created at Experion DCS.
I configured all the details controllers and points in my DCS and the communication is healthy up to 5 cards.After hooking sixth card the communication percentage error is increasing.
All this cards i tested individually with MODSCAN32 and giving data without an error.
CARD Details : CE-01 Gas Detection System
DCS: Honeywell Experion R311
Please suggest if any other consideration to make it healthy.