No Comm From Micro to STP1

Communication failure between the microprocessor and the stepper motor module 1 (STP1).

Possible causes

Loose data bus connector
Power failure to STP1
Electromagnetic interference
Hardware failure on the STP1 board

Recommended actions

Inspect and tighten communication connectors
Verify power supply to STP1 board
Check CAN bus termination resistors
Replace STP1 board if persists after reset

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