Omron CJ2 CPU UNIT SOFTWARE User Manual page 217

Immediate Refreshing
When the immediate refreshing variation of an instruction is specified by inputting an exclamation
point just before the instruction, and the instruction's operand is an output bit or word, refreshing is
performed as described below. This immediate refreshing is performed in addition to the normal I/O
refreshing performed once each cycle.
Bit Operands
Just after the instruction is executed, the ON/OFF status of the 16 I/O points allocated to the word
containing the specified bit will be output to the output devices.
Word Operands
Just after the instruction is executed, the ON/OFF status of the 16 I/O points allocated to the speci-
fied word will be output to the output devices.
Example
In the following example, CIO 2.01 is allocated to an actuator, an external device connected to the
output terminal of an Output Unit. The ON/OFF status of CIO 2.01 is output to the actuator just after
!OUT 2.01 is executed.
IORF(097) Refreshing
When IORF(097) (I/O REFRESH) is executed, the ON/OFF status of output bits in the specified
range of words is output to their external devices. This I/O refreshing is performed in addition to the
normal I/O refreshing performed once each cycle.
The following IORF(097) instruction refreshes the status of all I/O points in I/O Area words CIO 0 to
CIO 3. The status of input points is read from the Input Units and the status of output bits is written
to the Output Units.
CJ2 CPU Unit Software User's Manual
Ladder symbol Mnemonic
2.01
OUT 2.01
CPU Unit
CIO 2.01
Bit allocation
Output Unit
Output
just after
instruc-
tion
execu-
tion.
6 I/O Memory Areas
Actuator
6
6-11