Basic SFC Functions
Mnemonic Function Format and Devices
LDP
(LoaD Pulse)
gical
operation-Rising edge
Initial lo
pulse
Devices: X, Y, M, S, T, C, Dn.m, FDn.m
LDF
(LoaD Falling
pulse)
Initial logical
operation
Falling/trailing edge
pulse
Devices: X, Y, M, S, T, C, Dn.m, FDn.m
ANDP
(AND Pulse)
Serial connection of
Rising edge pulse
Devices: X, Y, M, S, T, C, Dn.m, FDn.m
ANDF Serial connection of
(AND Falling
pulse)
Falling/trailing edge
pulse
Devices: X, Y, M, S, T, C, Dn.m, FDn.m
ORP
(OR Pulse)
Parallel connection of
Rising edge pulse
Devices: X, Y, M, S, T, C, Dn.m, FDn.m
ORF
(OR Falling
pulse)
Parallel connection of
Falling/trailing edge
pulse
Devices: X, Y, M, S, T, C, Dn.m, FDn.m
In the preceding chart, when X005～X007 turns from ON t OFF or
om OFF to ON, M13 or M15 has only one scan cycle activates.
Mnemonic
and
Function
Description
z LDP、ANDP、ORP are active for one program scan after the
associated devices switch from OFF to ON.
e program scan after the
OFF.
z LDF、ANDF、ORF are active for on
associated devices switch from ON to
M13
M15
X5
X6
M8000 X7
M13
M15
X5
o
fr
X6
M8000 X7
LDP X5
ORP X6
OUT M13
LD M8000
ANDP X7
OUT M15
LDF X5
ORF X6
OUT M13
LD M8000
ANDF X7
OUT M15
Program
53
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