Malfunctions with Indications
2-27
CP-18
Arm Current
Unbalanced
(Soft)
This fault indicates that the Armature current has
excessive ripple content. A coast stop will be
initiated.
Below are a list of conditions that may have contributed to
the occurrence of the fault.
1. Could be caused by excessive high current loop gains
2. The excessive ripple content could be due to an
imbalance in the three-phase incoming voltage supply.
Verify the condition of the isolation transformer and the
terminal connections. Monitor the incoming three-phase
voltage and if an imbalance is observed correct it before
attempting to continue. Execute a CLEAR FAULT to
resume operation.
3. The pulse driver circuitry may have malfunctioned and
one or more SCRs may not be firing when commanded.
Verify that all gate leads are connected and all six SCR
pairs are operating correctly by executing the Current
Loop Test under the Autotune. See the Autotune
description in Chapter 5 for more details. If a failure is
indicated refer to the Magnetics/Power Structure section
of this chapter.
4. Verify that the CTs have been installed properly. Check
the motor for loose brush holders. Megger the motor
armature to ground, field to ground and armature to field.
5. A loss of one of the 3 phase lines has occurred. This may
not be detected as a phase loss due to other machines or
equipment operating on the same lines, but will be
detected as an imbalance. Verify that all incoming lines
are present and at the proper level. Execute a CLEAR
FAULTS to resume operation.
6. A faulty DC tach or encoder.
CP-19
Short CKT
Through Bridge
(Soft)
This fault occurs if the armature current exceeds
25% of the maximum armature bridge for a period
of 90 AC line cycles (1.5 seconds) while the
contactor is open and the armature bridge is
disabled.
Check for shorted SCRs, and execute a SYSTEM RESET.
CP-31
Integrate Reset
(Hard)
Internal hardware error detected. A coast stop will
be initiated.
Execute a SYSTEM RESET or cycle power and attempt
normal operation. If the fault reoccurs, replace Main Control
Board.
CP-32
A/D Timeout
(Soft)
Internal hardware error detected. A coast stop will
be initiated.
Execute a CLEAR FAULT and attempt normal operation. If
the fault reoccurs, replace Main Control Board.
CP-33
A/D Busy (Soft)
Internal hardware error detected. A coast stop will
be initiated.
Execute a CLEAR FAULT and attempt normal operation. If
the fault reoccurs, replace Main Control Board.
CP-34
End Stop Timing
(Soft)
Internal hardware error detected. A coast stop will
be initiated.
Execute a CLEAR FAULT and attempt normal operation. If
the fault reoccurs, replace Main Control Board.
CP-35
System Tripped
(Soft)
Internal hardware error or fault condition detected.
A coast stop will be initiated.
Check the Fault Queue for any additional faults indicated.
Correct any and all fault conditions present. Execute a
CLEAR FAULT and attempt normal operation. If the fault
reoccurs, replace Main Control Board.
CP-40
FIFO Flush (Soft) Internal processor error detected. A coast stop will
be initiated.
Execute a CLEAR FAULT and attempt normal operation. If
the fault reoccurs, replace Main Control Board.
Current Processor Faults
No.
Name
Description
Recovery
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www.aotewell.com
sales@aotewell.com
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