Motion Control Engineering Motion 4000 Manual page 352

Troubleshooting
Table 5.1 Status and Error Messages
MPI A or B UNT SW POSITION ERROR
Description: The UNT 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 UNT 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 UP NORMAL LIMIT OPEN
Description: The indicated processor has detected that the up directional limit switch is open. The car will
run no further in the up 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 SPI4 on TC-MPI board and limit switch connections.
4. If switch is virtual, check F7 programming.
MPI-B BRAKE MODULE 3 - 4 IS OFFLINE
Description: The identified brake module is not responding.
Troubleshooting:
1. Check the CAN connection to the module.
2. Check power connections to the module.
3. Replace the module.
MPI-B SPA IS OFFLINE
Description: TC-MPI board safety processor SPA is offline.
Troubleshooting:
1. Power to the TC-MPI board may not be connected. Check the CAN bus connection between the TC-MPI
board and the CAN hub.
2. Make sure jumper JP4 on the TC-MPI board is not shorted.
3. If the SPA indicator is not lighted, reboot the processor by cycling power to the controller or by remov-
ing the CAN bus connection to the TC-MPI board for a few seconds.
MPI-C CONTRACT OVERSPEED
Description: The machine has exceeded contract speed.
Troubleshooting:
1. Check for correct gear ratio, drive parameter LF.22.
2. Check that the setting of F7 parameter 149 and 150 are correct.
MPI-C DRIVE FAULT
Description: This fault indicates that the controller has detected a DFLT input The car will perform an
emergency stop with the motor contactor and brake contactor immediately dropped.
Troubleshooting:
1. Check and troubleshoot drive faults.
MPI-C DRIVE NOT READY
Description: The drive ready input failed to activate. Check the drive for a fault - troubleshoot the drive
fault.
Troubleshooting:
1. Check the DRDY input to the TC-MPI board.
2. Check the ready output from the drive.
3. Check that the drive is operational.
5-30 Manual # 42-02-2P24
Scrolling Message - Special Event Message