Specifications
5–8
Identifying the Components of Your Processor
Publication
1747-6.2
The table below provides a general explanation of each processor
status LED on the SLC 5/03 processor.
➀➁
Processor LED When It Is Indicates that
On (steadily) The processor is in the Run mode.
RUN
(Color: green)
Flashing (during
operation)
The processor is transferring a program from
RAM to the memory module.
Off The processor is in a mode other than Run.
Flashing (at power up) The processor has not been configured.
FLT
( olo )
Flashing (during
operation)
The processor detects a major error eithe
r i
n
the processor, expansion chassis or memory.
(
C
olo
r:
red
)
On (steadily) A fatal error is present (no communications).
Off There are no errors.
BATT
( olo )
On (steadily)
The battery voltage has fallen below a
threshold level, or the battery or the battery
jumper is missing or not connected.
(
C
olo
r:
red
)
Off
The battery is functional, or the battery jumper
is present.
FORCE
( olo a b )
Flashing
One or more input or output addresses have
been forced to an On or Off state but the
forces have not been enabled.
(Color: amber)
On (steadily)
The forces have been enabled.
Off No forces are present or enabled.
DH
4
85
On (steadily)
The Communications Active Bit (S:1/7) is set
in the System Status file and processor is
actively communicating on the network.
DH
4
85
(Color: green)
Flashing
There are no other active nodes on the
network.
Off A fatal error is present (no communications).
On (flashing)
DF1 Mode
The SLC 5/03 is transmitting on the network.
Off
DF1 Mode
The SLC 5/03 processor is not transmitting on
the network.
RS232
(Color: green)
On (steadily)
DH485 Mode
The Communications Active Bit (S:1/7) is set
in the System Status file and the processor is
actively communicating on the network.
Flashing
DH485 Mode
The processor is trying to establish
communications, but there are no other active
nodes on the network.
Off
DH485 Mode
A fatal error is present (no communications).
➀
If
the LEDs on the SLC 5/03 turn on in a predefined sequence, the SLC 5/03 is in the process of
downloading a new operating system.
➁
See chapter 10 for more information on LED status.