Encoder cable not shielded, crosstalk from motor phases.
Random error 1031 only when motor runs >500 rpm. cmmo-st-c5-1-diop error codes
Replaced encoder cable with double-shielded LiYY-CY, connected shield to both ends (encoder housing and controller PE). Error eliminated. Encoder cable not shielded, crosstalk from motor phases
This allows a PLC to log and react to error progression. The DIOP version lacks object dictionary access for detailed error history. Therefore, operators must rely on blink codes and binary outputs. Festo recommends using the CMMO-ST-DIOP-IO-LINK adapter if more than 5 error types need differentiation. 8. Case Study: Intermittent Error 1031 (Encoder Error) System: CMMO-ST-C5-1-DIOP with external incremental encoder (TTL, 1024 PPR) for closed-loop stepper mode. Encoder cable not shielded