No Comm From Micro to STP3

Communication failure between the microprocessor and stepper motor module 3 (STP3).

Possible causes

Open or shorted CAN bus wiring
Loss of power supply to STP3
Internal board processor failure
Firmware incompatibility

Recommended actions

Check signal connectors in electrical panel
Measure power supply voltages
Verify CAN end-of-line resistance
Replace STP3 module

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