Basic Instructions
2 − 63
Differential instruction operation between JP and LBL instructions
If a differential instruction is used in the area between a JP and LBL instruction, be aware that the output will
differ as shown below depending on the execution condition of the JP and the input timing of differential
instruction.
X1
DF
Y10
LBL 1
X0
JP 1
Time chart 1 Time chart 2
X0
X1
Y10
Previous
execution of
JP instruction
Since the execution
condition X1 for the
differential instruction did
not change from the
previous execution, the
differential output cannot
be obtained.
X0
X1
Y10
Since the execution
condition X1 for the
differential instruction
changed from on to off
from the previous
execution, the differential
output can be obtained.
Previous
execution of
JP instruction
on
off
on
off
on
off
on
off
on
off
on
off
When the execution condition for the JP instruction equals the execution condition for the differential
instruction, the leading edge (or trailing edge) of the execution condition for the differential instruction will not
be detected.
If the differential output is required, do not write the differential instruction between the JP and LBL
instructions.
X1
DF/
Y11
LBL 1
X1
JP 1
Not executed.
X1
DF/
Y11
LBL 1
X1
JP 1
Placed outside of the area between JP and LBL.
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