GE Industrial Solutions EntelliPro ES - Manual (Page 238)

If “Communication Error” appears in the message box, there is no communication to the EntelliPro ES.
When a communication error is reported, check for missing cable connections and appropriate Modbus address settings.
See section 6.2 for additional settings information.
2 : Valve 1
local
operate
Drawer ready
COM 1
Communication Error
COM1: Connection 1
No Modbus communication to
the connected EntelliPro ES.
Message box appears cyclically
EPOS MOTOR MANAGEMENT SYSTEM – INSTRUCTION MANUAL 6.3
CHAPTER 6: ENTELLIPRO CP3 and CP5 APPLICATION