Rockwell Automation SA500 Diagnostics, Troubleshooting Guide - Manual (Page 14)

2-4 SA500 Diagnostics, Troubleshooting, and Start-Up Guidelines
The results of the diagnostics are stored in either the Drive Warning register
(203/1203) or the Drive Fault register (202/1202) in the UDC module's dual port
memory. How drive faults and drive warnings are indicated and how they affect the
operation of the drive is described in the following sections.
2.4.1 Drive Faults
When the PMI detects any of the conditions identified in the Drive Fault register, it will
shut down the drive as described below. To determine the cause of a drive shutdown,
the following indicators are provided:
• Drive Fault register (202/1202)
The PMI will set a bit in the Drive Fault register to indicate the condition that caused
the shutdown. The interlock tests check this register for fault conditions that have
occurred. Refer to Appendix A for a complete description of the Drive Fault Register.
• Drive Status Register (200/1200)
The PMI will set the Fault Detected bit (bit 8, FLT@) of the Drive Status register when
a drive fault has been detected.
• LEDs on the UDC module
If either LED (DRV FLT A or DRV FLT B) is on, a drive fault has been detected for the
drive using that communication channel.
• LEDs on the Power Module
The Power Module’s faceplate contains 15 status/fault LED board. Refer to Appendix
E for LED definitions.
• Error log for the UDC task
The error log for the task in which the fault occurred is accessed through the ON LINE
menu of the AutoMax Programming Executive. A list of the drive fault error codes can
be found in Appendix D. Refer to appropriate AutoMax Programming Executive
instruction manual for more information regarding the Programming Executive and the
ON LINE menu.
2.4.1.1 How the System Reacts to Drive Faults
As described in section 2.4.1, if the PMI detects any of the conditions identified by the
Drive Fault register, it will shut down the drive. This means that the PMI responds by
immediately disabling the gates of the power devices, causing the motor to begin a
coast-to-rest stop. The PMI will wait 100 msec after the fault before turning off the
MCR output.
Note that the UDC task is not stopped automatically is a drive fault causes a
shut-down of the drive. The user must ensure that the application task(s) test the
Drive Fault register (202/1202) and takes any appropriate action if a fault is detected.