Panasonic FP-E Programming Manual page 1064

Precautions Concerning Programs
Example 1: DF (leading edge differential) instruction
RUN
(Power on)
Y10
Example 2: CT (counter) instruction
CT200
counting
operation
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X0
DF
X0 R9014
DF
X0
Even if X0 was initially on, the input condition for the
DF instruction is off−to−on at the second scan,
therefore differential output is obtained.
X0
X1
R9014
X0
X1
RUN
(Power on)
X0
Even if X0 was initially on, the input condition
for the counter is off−to−on at the second scan,
therefore the count is incremented.
Y10
Add R9014
Y10
CT 200
Add R9014
CT 200