Maintenance
Troubleshooting
MagneMover LITE Service Manual 55
Rockwell Automation Publication MMI-UM037A-EN-P - April 2020
Motor reports ‘Not in operational
mode’.
All motors currently enter this
state for 100 ms, and then auto-
matically exit. This state allows
sampled A/D inputs and observ-
ers settle before using this data.
There is no lockout of behavior
that is based on this fault, this
fault is informational only.
Wait 100 ms after reset or power
on before sending any commands
to the motor.
After power cycling the +36V DC
propulsion power line multiple
times, the motor does not clear
the under-voltage fault.
The PTC used to limit inrush cur-
rent eventually heats up enough
that it goes to a high-resistance
state. This state does not allow the
motor controller to power up
enough to clear the under-voltage
fault.
Turn off the +36V DC power sup-
ply for a few minutes to allow the
PTC to cool down sufficiently to
allow proper resumption of opera-
tion upon reapplication of the pro-
pulsion power source.
Make sure that there is a mini-
mum of 20 seconds between turn
on cycles and 10 seconds between
turn off and turn on (power
cycle). Additionally, monitor the
Soft Start bit to make sure it is off
before turning the propulsion
power back on.
The motor reports an under-volt-
age fault.
Power being supplied to the
motor is below +27V DC.
Verify the voltage output from the
power supply.
Verify the voltage at the motor.
Verify that all power wiring is
sufficient to carry all loads and
deliver the proper power to the
motors.
Reduce power cable resistance
between motors that share a com-
mon +36V DC power supply.
The fault clears once the power
bus rises above +28V DC.
The motor reports a Soft Start not
complete fault
The internal power bus of the
motor is below +27V DC.
The fault clears once the power
bus rises above +32 VDC.
Table 8: Power Related Troubleshooting (Continued)
Symptom Problem Description Corrective Action
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