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Reginald VazquezSep 3, 2025
Why is the communication indicator on my Omron E5EC PLC not lit?
- MMatthew WoodsSep 3, 2025
If the communications indicator on the PLC is not lit, it could be due to several reasons: * The power supply is not turned ON to the E5@C Controller with communications unit number 0. * The wiring is not correct. * The communications settings are not the same between the PLC and the E5@C. * The E5@C was moved to the initial setting level (setting area 1). * Check the cycle time of the PLC. If it is longer than the value set for the Receive Data Wait Time parameter, change the set value of this parameter so that it is longer than the cycle time.