Festo CPX-CMAX - Page 85

6 Diagnostics and error handling
Festo – P.BE-CPX-CMAX-SYS-EN – en 2017-09b – English 85
Group 8 – Displacement encoder error
CPX error group 108 (CPX-MMI: [Encoder error] )
No. Reset typeError levelMessage
82 Invalid measured values or displacement encoder faulty F2 F
Cause DGCI/DDLI: No magnet present.
Measure  Check magnet on the displacement encoder, replace magnet holder if
defective.
Cause DGCI/DDLI: Several magnets present.
Measure  Make sure that no external magnets are in close proximity to the
displacement encoder.
Cause DGCI/DDLI: Multiple pulses (e.g. due to vibrations).
Measure  Check mounting.
 Avoid vibration.
Cause DNCI: Sensor error.
Measure  Replace sensor head in the DNCI.
Cause Potentiometer: Operating voltage drop below 12 V.
Measure  Check operating voltage, check cables for short circuit and corrosion.
84 Reference position of the displacement encoder lost F2 N
Cause Although the drive has set the status “Referenced”, the displacement encoder/
sensor interface reports the status “Not referenced”.
Measure  Reference again.
85 Operating voltage of displacement encoder/sensor interface
outside the tolerance range
F2 F
Cause Operating voltage of the displacement encoder too low.
Measure  Check power supply.
 Check lines on the axis string.
87 Defective displacement encoder cable or potentiometer in
electrical end position
F2 N
Cause Defective displacement encoder cable.
Measure  Check power supply.
 Check lines on the axis string.
 Switching off/on may be required.
 If this occurs repeatedly, replace the displacement encoder or sensor
interface.
Cause Displacement encoder in the electrical end position (potentiometer only).
Measure  Move displacement encoder (potentiometer) from the end position.