Beckhoff · EL6900 Operating Instructions
This diagnostic code (found within FA00:03 Temperature error) indicates that the temperature difference between the internal measuring points (e.g., Temperature Primary MC and Temperature Secondary MC, FA80:01 and FA80:02) has exceeded its permissible threshold. A significant temperature differential can suggest localized heating or cooling issues within the terminal, potentially leading to component stress or operational instability.
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Check the diagnostic object FA80:01 (Temperature Primary MC) and FA80:02 (Temperature Secondary MC) to identify the specific temperature values and calculate the difference.
Verify the mounting and heat dissipation of the EL6900 terminal for even temperature distribution.
Inspect the terminal internally for any debris or obstructions that might impede heat transfer or cause localized heating.