Status and Error Messages
5-23
5
Motion 4000
MPI A or B DNT SW POSITION ERROR
Description: The DNT switch was not detected at the expected location. The car will perform an emer-
gency slowdown and then move at reduced speed to the next landing in the direction of travel. If the fault
clears, the car will resume normal service. If not, the car will open its doors and remove itself from service.
Troubleshooting:
1. Check the integrity of the landing/positioning system encoded tape.
2. If a physical DNT switch is used on this job, check switch wiring, integrity, and position.
If this is occurring on a job that is just being set up or adjusted or has had this problem sporadically:
3. Check F7 menu U/DNT Option setting.
4. Check F7 menu DNT Distance and DNT Delta Distance.
MPI A or B DOWN NORMAL LIMIT OPEN
Description: The indicated processor has detected that the down directional limit switch is open. The car
will run no further in the down direction.
Troubleshooting:
1. Review car adjustment and landing settings.
2. Adjust as required to prevent the car from overshooting the terminal and activating the directional
limit.
3. If switch is physical, check voltage at terminal SPI3 on TC-MPI board and limit switch connections.
4. If switch is virtual, check F7 programming.
MPI A or B DRIVE FAULT
Description: The drive has faulted.
Troubleshooting:
1. Check the drive display to identify the fault. Proceed as described in the drive manual.
2. After the problem has been corrected, reset the fault on the drive.
MPI A or B DRIVE NOT READY
Description: The drive has not reported ready status, DRDY, to the controller.
Troubleshooting:
1. Check the drive display to identify any fault. Proceed as described in the drive manual.
2. Check all connections from the controller to the drive and the drive to the motor.
3. After the problem has been corrected, reset the fault on the drive.
MPI A or B DRIVE ON FAULT
Description: The drive on input was lost while the car was in motion. This fault is reported immediately as
opposed to the normal pre-run check Drive On fault which is rechecked after 15 seconds.
Troubleshooting:
1. The drive enable status is not identical on all the processors. Check the event log for discrepancies
between the faults logged by each MPI processor.
2. Verify physical cable (DRE signal) connection between controller and drive.
Table 5.1 Status and Error Messages
Scrolling Message - Special Event Message
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