Motion Control Engineering Motion 4000 Manual page 344

Troubleshooting
Table 5.1 Status and Error Messages
MPI-A or B DET SW OVERSPEED
Description: The processor has detected a Down Emergency Terminal overspeed. Power will be removed
from brake and motor to bring the car to an immediate halt.
Troubleshooting:
1. Check the integrity of the landing/positioning system.
2. If the job has a physical DET switch, check the switch and connections.
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/DET Option setting (parameter 69).
4. Check F7 menu DET Speed, Distance, and Delta Speed settings (F7 parameters 104 through 107
respectively).
5. Check F7 menu settings for the terminal slowdown switch immediately preceding the DET switch.
MPI A or B DET SW POSITION FAULT
Description: The DET switch was not detected at the expected location. Power will be removed from brake
and motor to bring the car to an immediate halt.
Troubleshooting:
1. Check the integrity of the landing/positioning system encoded tape.
2. If a physical DET 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/DET Option setting (parameter 69).
4. Check F7 menu DET Distance and DET Delta Distance (parameters 105, 107 respectively).
MPI-A or B DNT SW HIGH OVERSPEED
Description: The processor has detected a Down Normal Terminal Switch High overspeed (exceeding
switch Speed setting plus Delta High Speed setting). Power will be removed from brake and motor to bring
the car to an immediate halt. The car will 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 the job has a physical DNT switch, check the switch and connections.
3. Check appropriate F5 menu overspeed parameters (17 - 40), to determine what car speed was at that
switch for the last normal run and at the time of the overspeed.
4. Check F7 menu DNTx Speed and Delta High Speed settings. Otherwise, move DNTx closer to terminal.
MPI-A or B DNT SW LOW OVERSPEED
Description: The processor has detected a Down Normal Terminal Switch Low overspeed (exceeding
switch Speed setting plus Delta Low speed setting). The car will perform an emergency slowdown, 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 the job has a physical DNT switch, check the switch and connections.
3. Check appropriate F5 menu overspeed parameters (17 - 40), to determine what car speed was at that
switch for the last normal run and at the time of the overspeed.
4. Check F7 menu DNTx Speed and Delta Low Speed settings. Otherwise, move DNTx closer to terminal.
5-22 Manual # 42-02-2P24
Scrolling Message - Special Event Message