Rockwell Automation 1747-L5xx SLC 500 Modular Hardware Style User Manual - Manual (Page 82)

Publication 1747-UM011G-EN-P - June 2008
82 Identifying the Components of Your Processor
SLC 5/01 Hardware Components
The table below provides a general explanation of the SLC 5/01
processor status indicators.
SLC 5/01 Status Indicators
PC RUN
CPU FAULT
FORCED I/O
BATTERY LOW
SLC 5/01 CPU
Memory
Module and
Socket
Left Side View Front View
DH-485
Channel 1
Battery
(provides back-up
power for the
CMOS RAM)
Serial Number and Catalog Number
Processor
Status
Indicator
(1)
(1) See chapter 10 for more information on status indicator status.
When It Is Indicates that
PC RUN
(Color: red)
On (steady) The processor is in the Run mode.
Off The processor is in a mode other than Run.
CPU FAULT
(Color: red)
Flashing (at power up) The processor has not been configured.
Flashing (during
operation)
The processor detects a major error either in
the processor, chassis or memory.
On (steady) A fatal error is present (no communication).
Off There are no errors.
FORCED I/O
(Color: red)
Flashing One or more input or output addresses have
been forced to an On or Off state but the
forces have not been enabled.
On (steady) The forces have been enabled.
Off No forces are present or enabled.
BATTERY LOW
(Color: red)
On (steady) The battery voltage has fallen below a
threshold level or the battery and the battery
jumper are missing.
Off The battery is functional, or the battery
jumper is present.