17
Commissioning
7.4.3.5 Quench Mode
There are three link positions that determine the behaviour of the quench circuit. The
factory setting is for the FS and ZS links to be fitted.
Note that opening the RUN input always resets the setpoint ramp output to zero. The
other effects of opening the RUN input depend on the position of the links below.
FS:
With only this link fitted, the drive is quenched
immediately by a stall condition or the removal of
the RUN signal on T7.
1S:
With only this link fitted, the drive is quenched after one second by a stall condition or
the removal of the RUN signal on T7.
ZS:
With only this link fitted, the speed ramp is reset by a stall condition or removal of the
RUN signal on T7, and the drive is quenched one second after zero speed is reached.
The drive will also be quenched if the motor shaft is at “standstill”, that is, the setpoint
and speed feedback are both less than ±1%.
CAUTION!
We recommend that the FS or the 1S link is fitted at all times.
If no links are fitted, a stall condition or the removal of RUN from T7 will reset the
speed ramp but the drive will not be quenched. Also, if only the ZS link is fitted
and the motor cannot reach zero speed, neither a stall condition nor removal of
RUN will quench the drive.
7.4.3.6 Stall Mode
Refer to "8.4 Stall Mode" on page 23 for details.
7.4.4 LEDs
There are four LEDs in the top left-hand corner of the
drive board indicating the direction of armature current
flow and the status of the stall timer.
+
-
STALL
TIMER
The LED that is illuminated
indicates the direction of armature
current flow.
These LEDs indicate the status of the stall timer.
• If both are off, the stall timer is not in operation.
• If just the TIMER LED is illuminated then the stall
timer is in operation but hasn’t tripped.
• If both the TIMER and STALL LEDs are illuminated
then the timer has tripped and the drive has been
quenched (provided that an appropriate quench
