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High−level Instructions
F143
(IORF)
Outline
Updates specified partial I/O points.
Program example
Input update
Trigger
R10
F143 IORF , WX 0 , WX 0
10
Output update
R20
F143 IORF , WY 0 , WY 0
20
D1
D2
Operands
Relay
Operand
Operand
WX WY WR
D1
A
A
N/A
D2
A
A
N/A
Explanation of example
Updates external input relays WX0 (X0 to XF) immediately when the execution condition (trigger) R10 turns
on and updates external output relays WY0 (Y0 to YF) immediately when the execution condition (trigger)
R20 turns on.
Description
Updates the external inputs X and external outputs Y specified by D1 and D2 immediately even in the
program execution stage.
Refreshing (Updating) initiated by the F143 (IORF) instruction is done only for the control unit.
With input refreshing (updating), WX0 should be specified for [D1] and [D2].
With output refreshing (updating), WY0 should be specified for [D1] and [D2].
The allowable I/O range for the partial update varies depending on the models.
3 − 314
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Partial I/O update
Ladder Diagram
Ladder Diagram
D1
D2
D1
D2
Starting word address
Ending word address
Timer/Counter Register
SV
EV
DT
N/A
N/A
N/A
N/A
N/A
N/A
FP0/FP0R/FP−e/FPΣ/FP−X
Index
Constant
Index
register
modifier
modifier
I
K
H
N/A
N/A
N/A
N/A
N/A
N/A
Availability
FP0/FP0R/FP−e/
FPΣ/FP−X
Boolean
Address
Instruction
10
ST
R
10
11
F143
(IORF)
WX
WX
20
ST
R
20
21
F143
(IORF)
WY
WY
A
A:
Available
A
N/A: Not Available
0
0
0
0
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