Omron CJ - PROGRAMMING MANUAL 12-2009 Programming Manual page 395

Battery-free Operation
Procedure
CS1-H, CJ1-H, CJ1M, or CS1D CPU Units
The following flowcharts show the procedures for the two types of CPU Unit.
Power ON
Operation with a Battery
Maintain
Yes
previous I/O
data at
startup?
No
Battery-free Operation
No
Initialize I/O
memory before
program
execution?
Yes
Yes, initialize I/O memory
from the program.
Initialize I/O
memory from the
program?
No
Initialize only DM
Area words allocated
to CPU Bus Units
and Inner Boards
(D20000 to
D32767)?
No
Initialize all of the DM and EM Areas
starting from D00000.
.
Other
Use normal operation. No
Memory Card is required.
CIO/WR/TIM
PLC Setup: Disable detection a
Required data? CNT/HR/DM/EM
low battery voltage and set I/O
Memory Hold Bit status to be
maintained at when power is
turned ON.
CNT/HR/DM/EM
Use normal operation. No
Memory Card is required.
PLC Setup: Enable detection a
low battery voltage.
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.
Battery-free operation not necessary.
Section 6-10
355