Exceeding load limits or operating outside the 0–50°C ambient temperature range. Troubleshooting Steps
monitoring, over-temperature (housing/power stage), and current monitoring.
These errors indicate structural mechanics blocking the motor or misconfigured tuning profiles. :
C5. Fault. Battery Fault. call a stairlift professional to diagnose and repair battery issues. E1. Affordable Stairlifts Motor controllers CMMO-ST - Festo Didactic Infoportal
Verify that your ambient operating conditions do not exceed the permitted limits (typically 50∘C50 raised to the composed with power cap C 122∘F122 raised to the composed with power cap F for the drive).
The master PLC stopped sending cyclic monitoring telegrams within the defined timeout window. To troubleshoot, verify Ethernet cabling, check the network switch reliability, or increase the watchdog timeout parameters inside the FCT interface if network latency is high. 4. Safety Circuit and STO Faults (0x50–0x5F)
When a fault occurs, the motor controller enters an error status, and the error must be managed appropriately.
: If the drive will not enable, check the X3 STO interface . Both STO1 and STO2 must be powered correctly for the output stage to activate.
: The sequence finishes with a two-digit specific code (e.g., 30 , 41 ). Sequence Example : If you see E →right arrow 04 →right arrow 10 repeating, the controller is throwing error 04-10 . Primary Diagnostic Groups and Error Codes Group 01: Power Supply and Voltage Faults
Based on field failure analysis of 500+ CMMO-ST-C5-1-DIOP units:
Connect to the FCT interface to pull a detailed error trace log and clear the fault history.
Undervoltage in the logic power supply. Drop below 18V DC, causing processor instability.
Discrepancy between the two STO channels at [X3] or a logic failure in the safety circuit.
Exceeding load limits or operating outside the 0–50°C ambient temperature range. Troubleshooting Steps
monitoring, over-temperature (housing/power stage), and current monitoring.
These errors indicate structural mechanics blocking the motor or misconfigured tuning profiles. :
C5. Fault. Battery Fault. call a stairlift professional to diagnose and repair battery issues. E1. Affordable Stairlifts Motor controllers CMMO-ST - Festo Didactic Infoportal cmmo-st-c5-1-diop error codes
Verify that your ambient operating conditions do not exceed the permitted limits (typically 50∘C50 raised to the composed with power cap C 122∘F122 raised to the composed with power cap F for the drive).
The master PLC stopped sending cyclic monitoring telegrams within the defined timeout window. To troubleshoot, verify Ethernet cabling, check the network switch reliability, or increase the watchdog timeout parameters inside the FCT interface if network latency is high. 4. Safety Circuit and STO Faults (0x50–0x5F)
When a fault occurs, the motor controller enters an error status, and the error must be managed appropriately. Exceeding load limits or operating outside the 0–50°C
: If the drive will not enable, check the X3 STO interface . Both STO1 and STO2 must be powered correctly for the output stage to activate.
: The sequence finishes with a two-digit specific code (e.g., 30 , 41 ). Sequence Example : If you see E →right arrow 04 →right arrow 10 repeating, the controller is throwing error 04-10 . Primary Diagnostic Groups and Error Codes Group 01: Power Supply and Voltage Faults
Based on field failure analysis of 500+ CMMO-ST-C5-1-DIOP units: : C5
Connect to the FCT interface to pull a detailed error trace log and clear the fault history.
Undervoltage in the logic power supply. Drop below 18V DC, causing processor instability.
Discrepancy between the two STO channels at [X3] or a logic failure in the safety circuit.