Rockwell Automation Publication 7000-TG002J-EN-P - March 2015 39
Fault Messages Chapter 1
X Refrnce Cmd Loss 23 The drive has lost communication with the device responsible
for providing the speed command to the drive. This has been
set to annunciate as a fault. The drive will configure the Speed
Command Loss as a fault when the associated bit in DPI Loss
Mask (P175) is set to a 1. Setting the bit to 0 will cause the
drive to indicate a warning and run at the last commanded
speed.
The fault could be the DPI adapter or the 4…20mA signal
wired to the analog input (IFM board). Be sure that all
connections are secure, device is powered and operating
correctly.
• Check P275 in the Speed Command group to see if is responding to the external speed
command, if not responding, then check for loose or open wire connected to the drive ACB
or replace the ACB
• Be sure that the communication device is powered.
• Check P275 in the Speed Command group to see if is responding to the external speed
command, if not responding, then check for loose or open wire connected to the drive ACB
or replace the ACB.
• Verify the light status and ensure the communicating device is operating properly.
• Verify the customer network is properly communicated with the device.
• Check ACB LED status.
• Cycle control power to the drive.
• Change the Adapter and/or ACB if all attempts to restore communication fail.
• Ensure that all connections at IFM are secure, and device is powered and operating
correctly.
X RNeut OvrCurrent 115 This fault is valid only for common mode choke drives (D2D)
and indicates that the current through the neutral resistor has
exceeded the trip settings. The current is displayed by
ComMode Current (P697).
• Check the neutral R for open.
• Check devices on rectifier and inverter for shorts.
• Check the line and motor filter cap for short between Phase to Neutral or Phase to Phase.
• Check the line and motor neutral voltage
• Verify the neutral R parameters, for non-DTD drives, set this parameter to zero ohms.
• Investigate the cause of neutral shift between the input and output filter capacitors which
could be due to severe line transients or insulation failure.
• Megger the drive if necessary.
X RNeutral OvrLoad 145 The neutral resistor required for Direct-to-Drive (DTD)
technology has reached an overload condition. This is
determined from parameters Neutral Resistor (P680), RNeut
Pwr Rating (P681). The current through the neutral resistor is
calculated by measuring the voltage across the resistor and
knowing the resistance. ComMode Current (P697) displays
that current, and R Neutral OL (P682) shows the overload
accumulator. The resistor is allowed 500% for 10 seconds
every 5 minutes, and P682 is normalized to fault whenever
the value reaches 1.00.
• Verify the resistor ratings.
• Verify that the drive voltage feedback splitter board is operating properly.
• Investigate the possibility of voltage unbalances on the input or output of the drive that
would create a voltage differential across the resistor.
• Contact the factory for further instructions.
• Verify the resistor parameters, for non-DTD drives, set this parameter to zero ohms.
• Investigate the cause of neutral shift between the input and output filter capacitors which
could be due to severe line transients or insulation failure.
• Megger the drive if necessary.
X RPM Exceed HiLmt 607 The Follower drive motor RPM is higher than the Master drive
and the deviation exceeded the acceptable range specified by
parameter Spd Window High (938).
• Check the mechanical coupling and encoder. Check Gear Ratio (P934) and Spd Window
High (P938) for the correct settings. Check parameter Master RPM Ref (P932) for the
correct reading.
All Drive Types
PF7000A
PF7000B
PF7000C
Marine Drive
Heat pipe Drive
Fault Message Fault Code Description Recommended Action(s)
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