Rockwell Automation SA3100 Diag,Troublesht,Startup,Guide - Manual (Page 18)

2-4 Diagnostics, Troubleshooting, and Start-Up Guidelines
2.4 Run-time Diagnostics
Run-time diagnostics are performed continuously by the PMI Regulator after its
operating system has been downloaded by the UDC module. These diagnostics test
the status of the PMI Regulator and the connected hardware and also check the
integrity of the communication link between the UDC module and the PMI Regulator.
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 Regulator detects any of the conditions described in the Drive Fault
register, it will shut down the drive. To determine the cause of a drive shutdown, the
following indicators are provided:
• Drive Fault register (202/1202)
The PMI Regulator 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 Regulator 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 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 PMI Regulator
The PMI Regulator contains a 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 Regulator detects any of the conditions
described in the Drive Fault register, it will shut down the drive. This means that the
PMI Regulator responds by disabling the gates of the power devices, causing the
motor to begin a coast to stop. When the PMI Regulator detects that current is less