Omron CJ1G-CPU series, Programming Manual

Page: 334 / 383

313
Battery-free Operation Section 6-10
as it is for the CS1 CPU Units. (With a Memory Card, the DM and EM Area
data can be included.)
CJ1 and CJ1 CPU Units
Battery-free operation is possible for the CS1 and CJ1 CPU Units by automat-
ically transferring data from a Memory Card at startup. In this case, the I/O
memory will not be maintained. (With a Memory Card, the DM and EM Area
data can be included.)
Procedure
The following flowcharts show the procedures for the two types of CPU Unit.
CS1-H, CJ1-H, or CJ1M CPU Units
CIO/WR/TIM
CNT/HR/DM/EM
CNT/HR/DM/EM
Operation with a Battery
Required data?
Maintain
previous I/O
data at
startup?
Use normal operation. No
Memory Card is required.
PLC Setup: Disable detection a
low battery voltage and set I/O
Memory Hold Bit status to be
maintained at when power is
turned ON.
Battery-free Operation
Initialize I/O
memory before
program
execution?
Initialize I/O
memory from the
program?
Initialize only DM
Area words allocated
to CPU Bus Units
and Inner Boards
(D20000 to
D32767)?
Initialize all of the DM and EM Areas
starting from D00000.
Use normal operation. No Memory
Card is required. User program and
parameter data backed up in flash
memory.
PLC Setup: Disable detection a low
battery voltage.
Automatically transfer data from a
Memory Card at startup.
Required files: AUTOEXEC.OBJ,
AUTOEXEC.STD, and
AUTOEXEC.IOM
PLC Setup: Disable detection a low
battery voltage.
Automatically transfer data from a
Memory Card at startup.
Required files: AUTOEXEC.OBJ,
AUTOEXEC.STD,
AUTOEXEC.IOM, etc.
PLC Setup: Disable detection a low
battery voltage.
Power ON
Yes
No
No
No
No
Other
.
Battery-free operation not necessary.
Yes
Use normal operation. No
Memory Card is required.
PLC Setup: Enable detection a
low battery voltage.
Yes, initialize I/O memory
from the program.