Rockwell Automation 1785-Lxxx Enhanced and Ethernet PLC-5 Programmable Controllers - Manual (Page 342)

Publication 1785-UM012D-EN-P - July 2005
E-4 Switch Setting Reference
I/O Chassis Backplane PLC-5 Controller in the I/O Chassis
Regardless of this switch setting, outputs are turned off when any of the following occurs:
processor detects a major fault
an I/O chassis backplane fault occurs
you select program or test mode
you set a status file bit to reset a local rack
If a memory module is not installed and processor memory is valid, the processor’s PROC LED
indicator blinks, and the processor sets S:11/9 in the major fault status word. Power down the processor
chassis and either install the correct memory module or set switch 6 ON.
If the processor’s keyswitch is set in REMote, the processor enters remote RUN after it powers up and has
its memory updated by the memory module.
You cannot clear processor memory when this switch is on.
4 5
2 - slot
1 - slot
1/2 - slot
1
A lways
O ff
19309
6 7
Outputs of this I/O chassis remain in their last state when
a hardware failure occurs.
Outputs of this I/O chassis are turned off when a
hardware failure occurs.
Pressed in
at top ON (closed)
Pressed in
at bottom OFF (open)
memory module transfer to processor memory at powerup.
memory module transfers to processor memory if processor memory
not valid.
memory module does not transfer to processor memory.
Processor memory protection disabled.
Processor memory protection enabled.
Not allowed
Processor Memory Protection
Switch
off
on
Memory Module Transfer
Addressing
Last State
Switch
on
off
Switches
Switches
off off
off on
on off
on on
off off
on on
on off
8
2
1
3
4
2
1
3
4
1