Publication 1747-UM011G-EN-P - June 2008
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 ina 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 thatControl Techniques FM-2
Control Techniques FM-3
Control Techniques FM-4
Control Techniques FM-3E
Control Techniques FM-4DN
Control Techniques F3R2E 6045-8002 Rev C
Control Techniques F3N2C
Control Techniques F3N5E
Control Techniques F3M524
Control Techniques FXM4 FXM-4 
Control Techniques FXM5 FXM-5
Control Techniques HB017
Control Techniques ALP-430 ALP430
Control Techniques RSR-2 Part# 960526-03
Control Techniques SLA1200025
Control techniques FOCUS 3 F3N5E 2415-8005
Control Techniques FOCUS 2 2450-8002
Control Techniques DIN3380
Control Techniques SE23400220
Control Techniques 9500-8602-R
Control Techniques CDE15HPICD
Control Techniques 7820-302520-080?0
Control Techniques 9600-6400 Dominax DD400
Control Techniques V4500ICD
Control Techniques 4Axis Axima 4000
Control Techniques WA2101
Control Techniques DBE1100S 
Control Techniques SKC3400220
Control Techniques SP1402
Control Techniques SM-I/O
Control Techniques Axima 4000 AX-400

1756-DH485  1756-DH485  1756-DH485
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0-00-00-030
Control Techniques ALP-130
Control Techniques SE23400400
Control Techniques SE 11200037 230V