Cmmo-st-c5-1-diop Error Codes [work]
The Festo CMMO-ST-C5-1-DIOP is a compact stepper motor controller widely used in industrial automation for precise positioning tasks. Like any sophisticated piece of automation hardware, it can encounter errors related to power, communication, or safety systems.
- Monitor ISDU 0x2060h (Internal temperature) – When > 75°C, reduce velocity in your PLC logic.
- Monitor ISDU 0x2020h (Supply voltage) – If < 20 V DC for 200 ms, trigger a controlled stop before undervoltage shutdown (0x1100).
- Monitor ISDU 0x2080h (Load angle) – A creeping increase from 15° to 45° indicates bearing wear or lubrication loss.
Hardware/Current: Includes "I²t monitoring" (overload protection) and general current monitoring. Troubleshooting Resources cmmo-st-c5-1-diop error codes
- 0x7310 – Supply voltage too low (<21.6V)
- 0x7311 – Supply voltage too high (>26.4V)
- 0x5440 – Motor temperature error (if sensor connected)
- 0x6320 – Following error (load stuck / too high inertia)
- 0x8400 – IO-Link watchdog timeout
- 0xFFxx – Internal firmware error (needs reset/power cycle)
3. Communication Errors
Error: CANopen / Bus Off
: Overvoltage/undervoltage of the load or logic supply (24V DC $\pm$15%). Safety (STO) : Mismatches in the Safe Torque Off signals (pins STO1/STO2) or a detected cable break. Motor/Motion Faults cap I squared t The Festo CMMO-ST-C5-1-DIOP is a compact stepper motor