Specifications

1–3 SLC 5/05 Ethernet Processor Features
Publication 1747-10.4
The table below provides a general explanation of the processor
status LEDs.
Processor LED When It Is Indicates that
On (steadily) The processor is in 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
(Color: red)
Flashing (during operation)
The processor detects a major error either in the processor,
expansion chassis, or memory.
(Color: red)
On (steadily) A fatal error is present (no communications).
Off There are no errors.
BATT
(Color: red)
On (steadily)
The battery voltage has fallen below a threshold level, or the
battery or the battery jumper is missing or not connected.
(Color: red)
Off The battery is functional, or the battery jumper is present.
FORCE
Flashing
One or more input or output addresses have been forced to an
On or Off state, but the forces have not been enabled.
FORCE
(Color: amber)
On (steadily)
The forces have been enabled.
Off No forces are present or enabled.
Solid Green
The Ethernet port is functioning properly and is connected to
an active Ethernet network.
ENET
Channel 1
Flashing Green
The Ethernet port is functioning properly, is connected to an
active Ethernet network, and is transmitting packets.
Channel 1
(Color:
green or red)
Flashing Red
A hardware or software fault has occurred and is being
reported via a code. Contact Allen-Bradley Global Technical
Services for assistance.
Off No Ethernet connection or port not configured.
On (steadily)
DF1 Protocol
The SLC 5/05 processor is transmitting.
Off
DF1 Protocol
The SLC 5/05 processor is not transmitting.
RS232
On (steadily)
ASCII Mode
The SLC 5/05 processor is transmitting.
RS232
Channel 0
(Color: green)
Off
ASCII Mode
The SLC 5/05 processor is not transmitting.
(Color: green)
On (steadily)
DH485 Protocol
The Channel 0 Communications Active Bit (S:33/4) is set in
the System Status file, and the processor is actively
communicating on the network.
Flashing
DH485 Protocol
The processor is trying to establish communications, but there
are no other active nodes on the network.
Off
DH485 Protocol
A fatal error is present.
Processor Status LED
Operation