4 Quick-start guide
4.3 Operability check
To check whether the servo driver is ready for operation, proceed as follows:
1. Ensure that the STO input is deactivated.
2. Switch on the 24 V power supply. The READY LED on the front panel of the servo
drive lights up green. In the event of a fault, the READY-LED lights up red.
The seven-segment display shows a series of numbers in the event of a fault. This is
the number of an error message. You need to eliminate the cause of the indicated
error. To do so, read section 9 Fault messages on page 208.
If the device displays nothing at all, follow these steps:
1. Switch the power supply off.
2. Wait for 10 minutes so that the DC bus can discharge.
3. Check all of the connecting cables.
4. Check whether the 24 V supply is ready for operation (current limitation, polarity).
5. Disconnect all of the connectors with the exception of the connectors of the 24 V
supply to localise any potential overload due to faulty external wiring.
6. Switch the power supply back on.
Product manual BL 4000-C Page 39 of 298
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