Rockwell Automation 20D PowerFlex 700S Drive Ph I Control, Frames 1...11 - Manual (Page 161)

Troubleshooting 4-7
29 PWM Signal short This fault is detected when ever the actual IGBT gate are different
than the commanded IGBT states. This fault is detected by the Motor
Control processor.
30 MC Firmware One of the following Motor Control (MC) firmware errors has
occurred:
• MC Task Over Run
• Illegal Interrupt
• Self Diagnostic Fault
• Data Error
31 Precharge Error The precharge function has failed to complete within 30 seconds of
the precharge request.
A precharge request is initiated when the DC Bus voltage is above
the Undervoltage Trip level and the precharge input is high (the
requirement for the precharge being high can be bypassed by setting
parameter 838 [DigIn 1 Sel] to a value other than 14 “PreChrg/Disc”).
32 PWM Asynch The Motor Control Processor is not synchronized with SynchLink.
33 +/- 12volt Power The12V dc control voltage is outside the tolerance range. The
positive voltage power must be within the band from +15.25 to
+11.4V dc. The negative voltage power must be within the band
from -16.6 to -10V dc. Replace switch mode power supply. For
smaller frames, replace drive.
35 Ctrl EE Checksum The checksum read from the EEPROM does not match the
checksum calculated 1. Cycle power
2. Replace MCB
38 Brake OL Trip The calculated temperature of the dynamic braking resistor is too
high. The temperature is calculated by a thermal model.
• If the resistor is internal, the model uses resistor characteristic
stored in the power structure EEPROM memory.
• If the resistor is external, the model uses values of parameters
416 [Brake PulseWatts] and 417 [Brake Watts].
1. Verify actual temperature of brake
-If hot, wait for brake to cool
-If cold, cycle power to the drive
2. If cold, verify Par 416 [Brake PulseWatts]
and Par 417 [Brake Watts] are correct.
39 PowerEE CRC fail The Cycling Ring Checksum (CRC) of the data stored in the Power
Board EEPROM does not match the stored CRC.
40 Slink Mult Oflow A SynchLink Multiplier Overflow has occurred. Parameter 1034 [SL
Mult State] displays SynchLink multiplier overflow errors.
41 Ridethru Timeout The drive has been in a bus loss ridethrough condition for more than
two seconds.
42 DC Bus Undervolt Bus voltage has fallen below the level configured by parameter 409
[Line Undervolts]. 1. Verify the AC Line.
2. In frames 1-4, verify the precharge resistor
is present. (With power off, there should be
a resistance between DC+ and BR+).
In frames 5 & 6, check the precharge board
for errors. See the precharge board LED for
fault sequence.
43 VoltageFdbk Loss Loss of Motor or DC Bus Voltage Feedback has occurred because of
a communication failure between Motor Control and Voltage
Feedback board.
44 Runtime Data Rst Runtime data (hours, energy) has been reset to zero due to a
checksum error.
46 Interp Out Synch Interpolator is out of synch on motion control mode.
48 No Ctrl Device The controlling device (HIM or controller) has been disconnected
while the drive was running.
49 DPI Loss Port 1 DPI Port 1 has stopped communicating.
A SCAN port device is connected to a drive operating DPI devices at
500k Baud
Verify DPI device is present in port 1.
50 DPI Loss Port 2 DPI Port 2 has stopped communicating.
A SCAN port device is connected to a drive operating DPI devices at
500k Baud
Verify DPI device is present in port 2.
No. Name Description Action