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I/O Area Section 9-3
1,2,3... 1. Bit Operand
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 device(s).
2. Word Operand
Just after the instruction is executed, the ON/OFF status of the 16 I/O
points allocated to the specified word will be output to the output device(s).
In the following example, CIO 000201 is allocated to an actuator, an external
device connected to the output terminal of an Output Unit. The ON/OFF sta-
tus of CIO 000201 is output to the actuator just after !OUT 000201 is exe-
cuted.
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 0000 to CIO 0003. The status of input points is read from the
Input Units and the status of output bits is written to the Output Units.
In this example, the status of input points allocated to CIO 0002 and CIO 0003
are output to the Output Unit. (CIO 0000 and CIO 0001 are allocated to Input
Units.)
000201 OUT 000201
!
Ladder symbol Mnemonic
CIO 000201
CPU Unit
Output Unit
Actuator
Output
just after
instruction
execution.
Bit allocation
CIO 0002
CIO 0003
CPU Unit
Bit allocation
Output Unit
Actuator
Output when
IORF (097)
is executed.
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