Service functions and error messages
Page 137
Error message
Meaning of the error message
Measures
Main
index
Sub index
Action:
Check when the violation of the safety condition
occurs:
a)
During dynamic braking to zero.
b)
After the drive has reached zero speed.
With a) Check of braking ramp – record
measuring data - can the drive follow the
ramp? Change parameters for the slowdown
ramp or start time / delay times for
monitoring.
With a) If the option “Trigger basic device
quick stop” is activated: Check of the basic
device’s quick stop ramp.
With b) Check whether the drive continues
to oscillate after reaching the zero speed or
remains at idle and stable – increase
monitoring tolerance time if necessary.
With b) If the actual speed value is very noisy
when at rest: Check and if necessary adjust
expert parameters for speed recording and
detection of standstill.
5
STO: Safety Condition Violated
Cause:
Internal hardware error (voltage error) of the
safety module.
Action:
Module presumably defective. If possible,
replace with another module.
Cause:
Error in driver circuit section in the basic device.
Action:
Basic device presumably defective. If possible,
replace with another basic device.
Cause:
No feedback received from basic device to
indicate that output stage was switched off.
