Appendix
– Troubleshooting
20
Faults/Alarms/Difficulties
Description
Solutions
Z Marker Lost
The drive is expecting a
signal back from the proximity
sensor
but doesn’t see any
within the expected window.
Proximity Sensor
Verify that the target sensor
is being seen by the
proximity sensor every time
the target is lined up with
the proximity sensor using
the Z Edge Count (D1)
Verify that there is no noise
on the proximity sensor
channel by verifying that the
Z Edge Count (D1) isn’t
incrementing/decrementing
more than once per motor
rotation
Check that the proximity
sensor power supply on
TB1-17 and TB1-18 is
12V
DC
Verify that SW2 is switched
to the 12V position (in the
right position). Verify that
the voltage between TB1-17
and TB1-18 is 12 volts DC
