Omron CJ - PROGRAMMING MANUAL 12-2009 - Page 395

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Battery-free Operation Section 6-10
Procedure
The following flowcharts show the procedures for the two types of CPU Unit.
CS1-H, CJ1-H, CJ1M, or CS1D 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
Ye s
No
No
No
No
Other
.
Battery-free operation not necessary.
Ye s
Use normal operation. No
Memory Card is required.
PLC Setup: Enable detection a
low battery voltage.
Yes, initialize I/O memory
from the program.