Omron SYSMAC CS1D-PD Series Operation Manual page 195

Basic Procedures
I/O
memor y
Operating mode changed
IOM Hold Bit Status at Startup
When the IOM Hold Bit has been turned ON and the PLC Setup is set to pro-
tect the status of the IOM Hold Bit at startup (PLC Setup address 80 bit 15
turned ON), the contents of I/O memory that would otherwise be cleared will
be retained when the PLC is turned ON.
I/O
memory
PLC turned ON.
Output OFF Bit (A50015)
Turning ON the Output OFF Bit causes all outputs on Basic I/O Units and
Special I/O Units to be turned OFF. The outputs will be turned OFF regardless
of the PLC's operating mode.
↓ ↓
OFF OFF
Retained
Retained
Section 4-2
155