SCHUNK STM 48V - Electrical Signals Are Not Transmitted; No LED Lights up; POW LED (Green) Does Not Light up; RDY LED (Green) on the Controller Is Not Flashing

Troubleshooting
68 05/STM-48V/en/2011-04-01/CW
13.2.2 Electrical signals are not transmitted
Possible cause
Remedial measures
Interruption in the supply lines
 Check the supply lines for defects
 Check the electrical connections
(see chapter 9.2, page 38).
Table 38
13.2.3 No LED lights up
Possible cause
Remedial measures
There is no voltage.
 Check the output and logic power supply on the
MCS-12
Master (control system) on the field bus is not
active.
 Check the master, activate field bus communication.
Table 39
13.2.4 „POW“ LED (green) does not light up
Possible cause
Remedial measures
There is no voltage.
 Connect the output power supply for the MCS-12
(see chapter 9.2.3, page 39)
Table 40
13.2.5 „RDY“ LED (green) on the controller is not flashing
Possible cause
Remedial measures
Faulty connection
 Check the connection
(see chapter 9.2.3, page 39)
Logic power supply missing
 Check the logic power supply on the controller (see
chapter 9.2.3, page 39)
Table 41
13.2.6 „ERR“ LED (red) on the controller is flashing or
permanently on
Possible cause
Remedial measures
Insufficient voltage at "POW"
(undervoltage)
 Check the output power supply on the controller (see
chapter 9.2.3, page 39)
There is an error;
module indicates: CMD_ERROR
 To rectify the error, see the operating manual for the
controller: "MotionControl.pdf"
(see DVD for the controller).
Table 42