Safe Torque Off
6-34
AC30V series Variable Speed Drive
Troubleshooting
Symptom
Examine:
Probable cause
Remedy
GKP display
User
output
6
User inputs
7
Drive won’t start when
given a start
command
*** TRIPPED ***
SAFE TORQUE OFF
On
Both < 15V
STO is invoked.
When safe to do so, connect X10/01 and
X10/03 to 24V ± 10%
*** TRIPPED ***
SAFE TORQUE OFF
Off
Both >15V and <
30V
Fault latch might have
tripped
Remove all power from drive and re-apply. If
symptom persists, immediately return the
AC30V for repair.
See the DANGER box below.
Any other trip message, e.g.
overvoltage
Off
Both >15V and <
30V
Drive is tripped, but not
due to STO.
Reset the trip, and remove its cause. If
symptom persists, return the AC30V for repair.
Any other message
Off
Both >15V and <
30V
Faulty hardware
Return for repair
Drives starts
unexpectedly
Don’t care
Don’t care
Both < 5V
Faulty hardware
Immediately return the AC30V for repair.
See the DANGER box below.
Don’t care
Off
Both > 5V
STO not invoked by
the user.
Use STO according to instructions elsewhere in
this chapter.
Drive fails
comprehensive or
regular STO test
Don’t care
Don’t care
Don’t care
Faulty hardware
Immediately return the AC30V for repair.
See the DANGER box below.
The table above is only a guide. It may not be a comprehensive list of all possible symptoms relating to STO. Parker will not accept responsibility for any
consequences arising from its incompleteness or inaccuracy.
Important note:
There are no user-serviceable parts in the AC30V drive. Refer to the Safety Warnings and Limitations section on page 6-18 of this chapter.
6
Continuity through X10/05 and X10/06
7
Measure X10/01 and X10/03 relative to X10/02 or X10/04
