Mitsubishi MELSEC Q Series, Руководство по программированию

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3.10 Operation of OUT Instructions, SET/RST Instructions, or PLS/PLF Instructions Using Same Device
3-43
3
CONFIGURA
TION
OF IN
S
T
RU
CTIONS
• The timings of turning from OFF to ON between X0 and X1 are same
For refresh type CPU modules, the ON/OFF status of the PLS instruction executed last
during one scan is output when output (Y) is specified for the PLS instruction.
(4) PLF instructions that use a same device
The PLF instruction turns ON the specified device when the execution command turns from
ON to OFF. If the status is other than turning from ON to OFF (OFF to
OFF, OFF to ON or
ON to OFF), the PLF instruction turns OFF the specified device.
If the PLF instructions that use a same device are executed multiple times during one scan,
the PLF instructions turn ON the specified device when the execution command turns from
ON to OFF. In the status other than turning from ON to
OFF, they turn OFF the specified
device.
Thus, when the PLF instructions that use a same device are executed multiple times during
one scan, the devices turned ON in the PLF instruction may not be turned ON for one scan.
[Ladder]
O FF
O N
EN D
EN D EN D
X 0
X1
M0
O FF
O FF
O N
O N
P L S
EN EN O
d M0
X1
P L S
EN EN O
d M0
X 0
P L S
EN EN O
d M0
X1
P L S
EN EN O
d M0
X 0
M0 turns O N b ecause
X 0 goes O N (O FF O N ) .
M0 turns O N b ecause X1
goes O N (O FF O N ) .
(M0 rema i ns O N. )
M0 turns O FF b ecause X1 status i s
ot h er t h an O FF O N.
(M0 rema i ns O FF. )
M0 turns O FF b ecause X 0 status i s ot h er
t h an O FF O N.
P LF
EN EN O
d M0
P LF
EN EN O
d M0
X 0
X1