User guide

Publication 8720MC-IN002A-EN-P — December 2002
Troubleshooting Your 8720MC Servo Drive 3-7
Understanding the Fault
Parameters
Using the HIM module or DriveExplorer is an effective way of finding
the source of a drive fault. Several of the parameters are specifically
designed to annunciate drive status and faults. The following is a
description of the fault parameters. The 12 character fault messages
are shown in italics.
Parameter 11 - Shutdown Errors
This parameter is a bit pattern that identifies any active major fault
within the drive. IDN 00011, parameter 11 is a SERCOS standard
variable conforming to IEC Standard 61491. The structure of parameter
11 is:
If any bit is true (1) an error is indicated.
Bit 0 = Overload shut down - “Drive Ovrld”
Bit 1 = Amplifier over temperature shut-down - “Drive Ovrtmp”
Bit 2 = Motor over temperature shut down - “Motor Ovrtmp”
Bit 3 = Reserved
Bit 4 = Reserved
Bit 5 = Feedback error - “Feedback”
Bit 6 = Commutation error - “Commutation”
Bit 7 = Overcurrent error - “Overcurrent”
Bit 8 = Overvoltage error - “Bus Overvolt”
Bit 9 = Undervoltage error - “Bus Undervlt”
Bit 10 = “Phase Loss”
Bit 11 = Excess position error - “Follow Error”
Bit 12 = “Communicate”
Bit 13 = “Overtravel”
Bit 14 = Reserved
Bit 15 = 8720MC Drive Specific error - “AB Specific”