Omron CJ - PROGRAMMING MANUAL 12-2009 - Battery-Free Operation

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Battery-free Operation Section 6-10
Symbol
IORS(288) When executed, IORS(288) enables disables peripheral servicing that was
disabled with IOSP(287). Peripheral servicing will remain enabled if
IORS(288) is executed when it is already enabled.
Symbol
CS1G/H-CPU@@(-V1) and CJ1@-CPU@@ CPU Units
DI(693) When executed, DI(693) disables all interrupts (except for interrupts for the
power interrupt task), including interrupts for priority servicing, I/O interrupts,
scheduled interrupts, and external interrupts. Interrupts will remain disabled if
DI(693) is executed when they are already disabled.
Symbol
EI(694) When executed, EI(694) enables all interrupts (except for interrupts for the
power interrupt task), including interrupts for priority servicing, I/O interrupts,
scheduled interrupts, and external interrupts. Interrupts will remain enabled if
EI(694) is executed when they are already enabled.
Symbol
6-10 Battery-free Operation
The CS-series and CJ-series PLCs can be operated without a Battery
installed (or with an exhausted Battery). The procedure used for battery-free
operation depends on the following items.
• CPU Unit
• Whether or not I/O memory (e.g., CIO Area) is maintained or not
• Whether or not the DM and EM Areas are initialized at startup
• Whether or not the DM and EM Areas are initialized from the user pro-
gram
The above differences are summarized in the following table.
Note 1. When using battery-free operation, disable detecting a low battery voltage
in the PLC Setup regardless of the method used for battery-free operation.
IOSP
IORS
(@)DI(693)
EI(694)
EI(694) requires no execution condition.
CPU Unit Not maintaining I/O memory Maintaining I/O memory
No initializing DM
and EM Areas at
startup
Initializing DM and EM Areas at startup
From user program Not from user
program
CS1-H, CJ1-
H, CJ1M, or
CS1D
Use normal operation (using flash memory) or a
Memory Card.
Use automatic transfer
from a Memory Card at
startup. (Turn ON pin 2
of DIP switch.)
Not possible with any
method. A Battery must be
installed.
CS1G/H-
CPU@@(-V1)
and CJ1@-
CPU@@
Use automatic transfer from a Memory Card at
startup. (Turn ON pin 2 of DIP switch.)