Battery-Free Operation - Omron CJ - PROGRAMMING MANUAL 08-2008 Programming Manual

Battery-free Operation

IORS(288)
CS1G/H-CPU@@(-V1) and CJ1@-CPU@@ CPU Units
DI(693)
EI(694)

6-10 Battery-free Operation

CPU Unit
No initializing DM
and EM Areas at
startup
CS1-H, CJ1- Use normal operation (using flash memory) or a
H, CJ1M, or Memory Card.
CS1D
CS1G/H- Use automatic transfer from a Memory Card at
CPU@@(-V1) startup. (Turn ON pin 2 of DIP switch.)
and CJ1@-
CPU@@
Note
Symbol
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
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
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
EI(694)
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.
Not maintaining I/O memory
Initializing DM and EM Areas at startup
From user program
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) requires no execution condition.
Not from user
program
Use automatic transfer Not possible with any
from a Memory Card at method. A Battery must be
startup. (Turn ON pin 2 installed.
of DIP switch.)
Section 6-10
Maintaining I/O memory
351