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GEH-5201, Synchronous-motor Control
SECTION 6 - Installation and Start-up
FIELD IS APPLIED. This message appears when the
I1SPM has closed the field contactor. The message is displayed
briefly and is a normal I1SPM function.
P.F. TRIP. If the I1SPM has determined that the motor has
been operating below the power factor set-point for too long, the
I1SPM will trip and display "PF. TRIP"
REDST ERR. This message indicates that the CPU has
detected an error in a calculation performed as part of the
squirrel cage protection algorithm during a reduced-voltage
start. If this error persists after several attempts to start the
motor, the /lSPM may have an internal fault.
CHECK EXCITER. If the "CHECK EXCITER" message
appears the I1SPM has determined that the field voltage is below
the minimum that has been entered in the field voltage set-point.
The exciter should be checked to determine that the exciter is
functioning properly. Also, the set-point should be examined to
see if it is too high for the normal exciter output.
FIELD LOSS. The "FIELD LOSS" message indicates that
the field current is less than the field current set-point. The
exciter should be checked for proper output and the field current
set-point should be checked.
EAROM ERROR. After the I1SPM writes information to its
non-volatile memory (EAROM) the CPU immediately reads back
the last value and compares it with what should have been
written. If the two values are not equal the I1SPM will display the
"EAROM ERROR" message. This generally indicates that a
problem exists with the CPU Board and the /lSPM should be
replaced.
MISSING VOLTAGE. This message indicates that the ,(SPM
is NOT receiving a power factor-reference voltage input to
terminals "V1 Ext" and "GND" on Models CR192 "-E" and
"-F". This message may also mean that the V1-2 jumper on
the power-supply board is connected at Postion J-4 (internal)
for Models CR192 -C and -0; or position J5 (external) for
Models CR 192 "-E" and "-F".
SCP TRIP. The "SCP TRIP" message indicates that the
I1SPM has tripped the motor off-line due to a squirrel cage
protection trip. The motor should be allowed to cool at least
twenty (20) minutes before a restart attempt is made.
ISCP ERR. This message is an internal CPU message that
indicates that the incomplete sequence counter was improperly
initialized. If the message persists, the I1SPM should be
replaced.
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BELOW CURVE D and ABOVE CURVE A. These
messages indicate that the parameters stored in the stall time
and run time set-points are not compatible with each other.
Those two set-points should be checked and changed if
necessary.
RUN TIME ERROR. This message indicates that the CPU
has calculated an allowable run time for the motor that is too
large.
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DEC PTS. This message indicates thaI a set-point was
entered that had more than one decimal pOint. The set-points
should be checked and re-entered, if necessary.
INV DIGIT. This an internal CPU error and indicates that a
digit in the data memory was not in the proper form. The "SPM
should be re-initialized and checked again. If the problem
persists, replace the I1SPM.
PULL OUT TRIP. This message appears after a trip that
is caused by motor line current exceeding 4 times longer than
the PF. delay time.
INV BCD. This message indicates that an invalid character
was found in the data memory. The I1SPM should be re-
initialized and if the problem persists, replace the /lSPM.
PARAM TOO LARGE. If a parameter entered is outside the
valid range this message will appear. It usually indicates that the
last parameter entered from the keyboard needs to be re-
examined and corrected.
INC SEQ TRIP. This message indicates that the /lSPM has
tripped the motor due to an incomplete sequence fault. The
source of the fault should be located before the motor is started
again.
RESYNC ERROR. This message indicates that an
unusually long period of time has elapsed while the I1SPM was
attempting to resynchronize the motor.
CHECKSUM ERROR. This message indicates an EAROM
READ error. To correct this error, enter the Program Mode and
change at least one set-point and then store the set-point.
At
this
time the I1SPM recalculates the MEMORY CHECKSUM and the
problem should correct itself. If the problem persists, replace the
I1 SPM .
The I1SPtv1 also has several messages that appear at the
end of the programming process when the operator enters a
value outside the valid range of the set-point. These messages
are listed below and, although most are self explanatory, some
are not and need definition. Refer to the valid set-point ranges
described in Section 8 to determine the proper range for each
set-point.
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