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Rockwell Automation Publication 750-PM101B-EN-P - April 2022
Chapter 4 Troubleshooting
Faults
A fault is a condition that stops the drive. There are four types of faults.
Alarms
An alarm is a condition that, if left unaddressed, can stop the drive if the drive
running or does not allow you to start the drive. There are two types of alarms.
Events
Events occur under normal operation of the product. When an event occurs,
the drive records an entry consisting of a numeric event code and a time stamp
in an event queue. Events can help to troubleshoot problems.
Configurable Conditions
You can use a configuration parameter to set user-configurable conditions to
either fault, alarm, or ignore.
Viewing Faults, Alarms,
Events, and Exceptions
When a condition occurs, the drive records the occurrence in the fault, alarm,
event, or exception queue. These queues are accessible through software or the
HIM and provide you with a history of each type of occurrence. You can also
access diagnostic file parameters for additional information.
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Port 0: Diagnostics File, Status Group
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Port 0: Diagnostics File, Fault/Alarm Info Group
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Port 10: Diagnostics File, Status Group
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Port 10: Diagnostics File, Fault/Alarm Info Group
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Port 13: Diagnostics File, Status Group
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Port 13: Diagnostics File, Fault/Alarm Info Group
Type
Description
Major Fault
If this type of fault occurs while the line side converter or motor side inverter is modulating, it
stops modulating. If it occurs while the line side converter or motor side inverter is not
modulating, it prevents starting. It prevents starting until the fault is cleared.
Minor Fault
If this type of fault occurs while the line side converter or motor side inverter is modulating, it
allows modulation to continue. If it occurs while the line side converter or motor side inverter
is not modulating, it prevents starting. It prevents starting until the fault is cleared.
Resettable
This type of fault can be cleared. Resettable faults are identified by ‘Resettable Fault’.
Non-resettable
This type of fault normally requires drive or motor repair. You must correct the cause of the
fault before the fault can be cleared. The fault will be reset on powerup after repair. Non-
resettable faults are identified by ‘Non-Reset Fault’.
Type
Description
Alarm 1
Alarms of type 1 indicate that a condition exists. Type 1 alarms are user configurable.
Alarm 2
Alarms of type 2 indicate that a configuration error exists and the drive cannot be started.
Type 2 alarms are not configurable.
Type
Description
Configurable
Options can include:
‘Ignore’ (0) – No action is taken.
(1)
‘Alarm’ (1) – Type 1 alarm indicated.
‘Flt Minor’ (2) – Minor fault indicated. If running, drive continues to run.
‘FltCoastStop’ (3) – Major fault indicated. Coast to Stop.
‘Flt RampStop’ (4) – Major fault indicated. Ramp to Stop.
‘Flt CL Stop’ (5) – Major fault indicated. Current Limit Stop.
(1) When ‘Ignore’ (0) is the default setting, the occurrence is recorded in the exceptions queue. When you set a configuration
parameter to ‘Ignore’ (0), the occurrence is recorded in the event queue.