E41.

Modbus Communication Error

Omron · MX2 Series Type V2 Compact Inverter

What does E41. mean?

A Modbus communication error occurs when a timeout is detected, typically if the 'Operation Selection on Communication Error' (C076) is set to 'Trip' (00). This indicates issues with communication speed, wiring integrity, or incorrect terminating resistor settings, preventing reliable data exchange between the inverter and a Modbus master.

Additional Steps

Steps 1–2 are listed in Priority Fix.

  1. 3

    Ensure the terminating resistor (120 Ω built-in or external) is correctly set at both ends of the communication cable.

  2. 4

    Check for any disconnected Modbus wires or sources of electromagnetic interference.

Source: Omron MX2 Series Type V2 Compact Inverter
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