User`s guide

On-line Monitoring and Diagnostics
Controller Diagnostics
214 UMC800 Control Builder User’s Guide Release E
1/01
Class Status Possible Cause Controller Action User Action
CPU BUS ERROR Bus Error detected Executes
normally.
1. Force a cold start by
toggling switch between
PROGRAM and RUN.
2. Isolate system from noise
and force a cold start.
3. Replace CPU board.
CPU ADDRESS
ERROR
Address Error
detected
Executes
normally.
1. Force a cold start by
toggling switch between
PROGRAM and RUN.
2. Isolate system from noise
and force a cold start.
3. Replace CPU board.
CPU INSTRUCTION
ERROR
Bad Instruction
detected
Executes
normally.
1. Force a cold start by
toggling switch between
PROGRAM and RUN.
2. Isolate system from noise
and force a cold start.
3. Replace CPU board.
CPU VECTOR ERROR Bad Vector Interrupt Executes
normally.
1. Force a cold start by
toggling switch between
PROGRAM and RUN.
2. Isolate system from noise
and force a cold start.
3. Replace CPU board.
CPU SPURIOUS
INTERRUPT
Spurious Interrupt Executes
normally.
1. Force a cold start by
toggling switch between
PROGRAM and RUN.
2. Isolate system from noise
and force a cold start.
3. Replace CPU board.
MEMORY GOOD N/A N/A N/A
MEMORY LOW BATTERY Battery voltage is low. Executes
normally.
Replace battery.
MEMORY FLASH ERROR Flash failed to burn. Executes
normally.
1. Force a cold start by
toggling switch between
PROGRAM and RUN.
2. Replace CPU board.
RTC GOOD N/A N/A N/A