
f : Can be used
: Cannot be used
B–61863E/15
5. FUNCTIONAL INSTRUCTIONS
PMC SEQUENCE PROGRAM
317
PA1 PA3 SA1 SA2 SA3 SA5 SB SB2 SB3 SB4 SB5 SB6 SB7 SC SC3 SC4 NB NB2 NB6
f f f f f f f f f f f f f
The DIFD instruction set the output signal to 1 for one scanning period
on a falling edge of the input signal.
DIFD
SUB 58
Falling
edge
number
ACT
OUT
f
(a) Input signal (ACT)
On a falling edge(1→0)of the input signal, the output signal is set to 1.
(a) Output signal (OUT)
The output signal level remains at 1 for one scanning period of the
ladder level where this functional instruction is operating.
(a) Falling edge number
Model
PA1 PA3 SA1 SA2 SA3 SA5 SB SB2 SB3 SB4 SB5 SB6 SB7 SC SC3 SC4 NB NB2 NB6
Falling edge
number
1 to
256
1 to
256
1 to
256
1 to
256
1 to
500
1 to
256
1 to
500
1 to
1000
1 to
256
1 to
500
1 to
256
1 to
500
1 to
500
WARNING
If the same number is used for another DIFD instruction or
a DIFU instruction (described above) in one ladder diagram,
operation is not guaranteed.
1
234
Execution period
OUT
ACT
5.56
DIFD (FALLING EDGE
DETECTION)
5.56.1
Function
5.56.2
Format
5.56.3
Control Conditions
5.56.4
Detection Result
5.56.5
Parameters
5.56.6
Operation