Rockwell Automation 1784-KTXD User Manual Page 97

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Publication 1747-UM011F-EN-P - May 2007
Identifying the Components of Your Processor 97
Keyswitch for the
SLC 5/03, SLC 5/04, and SLC
5/05 Processors
The SLC 5/03, SLC 5/04, and SLC 5/05 processors include a 3-position
keyswitch on the front panel that lets you select one of three modes
of operation: RUN, PROGram, and REMote. You can remove the key
in each of the three positions.
RUN Position
This position places the processor in the Run mode. The processor
scans/executes the ladder program, monitors input devices, energizes
output devices, and acts on enabled I/O forces. You can only change
the processor mode by changing the keyswitch position. You cannot
perform online program editing.
To change the processor mode to Run, toggle the keyswitch from
PROG or REM to RUN. When the keyswitch is left in the RUN
position, you cannot use a programmer/operator interface device to
change the processor mode.
PROG Position
This position places the processor in the Program mode. The
processor does not scan/execute the ladder program, and the
controller outputs are de-energized. You can perform online program
editing. You can only change the processor mode by changing the
keyswitch position.
To change the processor mode to Program, toggle the keyswitch from
REM or RUN to PROG. When the keyswitch is left in the PROG
position, you cannot use a programmer/operator interface device to
change the processor mode.
ATTENTION
Depending on the size of your user program, the processor can
take up to 2.5 s to change modes when you change the position
of the keyswitch from RUN to PROG or to REM. Do not use the
keyswitch in place of a hardwired master control relay or an
emergency-stop switch.
IMPORTANT
The SLC 5/01 and SLC 5/02 processors do not have a keyswitch.
Therefore, all modes must be changed via the communication
channels.
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