Service functions and error messages
Page 131
Meaning of the error message
Action: Check when the violation of the safety condition
occurs:
e) During dynamic braking to zero.
f) 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.
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