Rockwell Automation 1747-L5xx SLC 500 Modular Hardware Style User Manual - Manual (Page 88)

Publication 1747-UM011G-EN-P - June 2008
88 Identifying the Components of Your Processor
FORCE
(Color: amber)
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.
DH-485
(Color: green)
On (steady) The Communication Active bit (S:1/7) is set in the System Status file and the processor is
actively communicating on the DH-485 network.
Flashing The processor is trying to establish communication, but there are no other active nodes on
the DH-485 network.
Off A fatal error is present (no communication).
RS-232
(Color: green)
On (flashing)
DF1/Modbus RTU
Master/ASCII mode
The SLC 5/03 processor is transmitting on the network.
Off
DF1/Modbus RTU
Master/ASCII mode
The SLC 5/03 processor is not transmitting on the network.
On (steady)
DH-485 mode
The Communications Active bit (S:33/4) is set in the System Status file and the processor
is actively communicating on the DH-485 network.
Flashing
DH-485 mode
The processor is trying to establish communication, but there are no other active nodes on
the DH-485 network.
Off
DH-485 mode
A fatal error is present (no communication).
(1) If the status indicators on the SLC 5/03 processor turn on in a predefined sequence, the SLC 5/03 processor is in the process of downloading a new operating system.
(2) See chapter 10 for more information on status indicator status.
Processor
Status
Indicator
(1)(2)
When It Is Indicates that