User`s guide

On-line Monitoring and Diagnostics
Controller Diagnostics
Release E UMC800 Control Builder User’s Guide 215
1/01
Class Status Possible Cause Controller Action User Action
RTC NOT
PROGRAMMED
RTC not programmed Time and date is
set to 00:00:00,
January 1, 1970.
Program Real Time Clock
(RTC)
RTC BAD DATA Bad date and time
Time and date is
to 00:00:00,
January 1, 1970.
1. Program RTC.
2. Disconnect then
reconnect power.
3. Replace CPU.
4. Replace boards in
backplane.
5. Replace backplane.
RTC BATTERY
FAILURE
RTC battery failed on
power-up.
Time and date is
set to 00:00:00,
January 1, 1970.
1. If LO BAT LED is OFF,
cycle power.
2. If LO BAT LED is ON,
replace battery and cycle
power.
RTC
PROGRAMMING
FAILURE
RTC failed to
program.
Time and date is
set to 00:00:00,
January 1, 1970.
1. Program RTC.
2. Disconnect then
reconnect power.
3. Replace CPU.
4. Replace boards in
backplane.
5. Replace backplane.
RTC READ FAILURE Unable to read RTC. Time and date is
set to 00:00:00,
January 1, 1970.
1. Program RTC.
2. Disconnect then
reconnect power.
3. Replace CPU.
4. Replace boards in
backplane.
5. Replace backplane.
I/O GOOD N/A N/A N/A
I/O MODULE ERROR
One of the I/O board
diagnostics failed.
N/A
Access the I/O Module
diagnostics display.
I/O BAD BACKPAN Bad backplane
EEPROM
Analog inputs
use default
coefficients.
1. Disconnect then
reconnect power.
2. Replace backplane
board.