Troubleshooting Guide Manual

B-2
SA500 Diagnostics, Troubleshooting, and Start-Up Guidelines
Rail Communication Warning Bit 13
The Rail Communication Warning bit is set if
a rail communication problem is detected
and logged in registers 4, 10, 16, or 22.
CCLK Not Synchronized Warning Bit 14
The CCLK Not Synchronized Warning bit is
set if the CCLK counters in the PMI
Regulator and the UDC module are
momentarily not synchronized.
PMI Communication Warning Bit 15
The PMI Communication Warning bit is set if
a fiber-optic communication error is
detected between the PMI Processor
module and the UDC module.
Communication errors in two consecutive messages will result in a drive fault.