A: That is either 5 flashes (Overtemperature) or Slow blink 1Hz (I²t warning). Install a fan or reduce the RMS current by lowering the "Peak current" parameter in FCT.
Error: CANopen / Bus Off
Symptom: You send the "Enable" signal (DIN 4 = High), but the RDY output remains Low. The FLT LED is off. cmmo-st-c5-1-diop error codes
Root Cause: The CMMO-ST-C5-1-DIOP has strict power-up sequencing. A: That is either 5 flashes (Overtemperature) or
Solution:
If the error persists after tuning, measure the motor cable resistance from the drive’s X2 connector to the motor. A common unnoticed failure is a broken shield drain wire causing EMI-induced step corruption at high microstepping (e.g., 1/256). Symptom: You send the "Enable" signal (DIN 4
| Error Code (Hex) | Description | Troubleshooting Steps |
| :--- | :--- | :--- |
| 0xA000 | Parameter Set Invalid | 1. Configuration parameters are out of range or corrupted.
2. Perform a "Load Default Parameters" via the web interface or Festo Configuration Tool (FCT). |
| 0xA010 | Node ID Conflict | Two devices on the network have the same address.
1. Check rotary switches on the front of the CMMO-ST.
2. Ensure unique addresses. |
| 0xB0xx | Fieldbus Error (EtherNet/IP / PROFINET) | 1. Check Ethernet cable connections and link lights.
2. Verify IP address settings (DHCP vs Static).
3. Check PLC master configuration; does it match the GSDML file? |