Chapter 6 SFC Edit
6-17
Notes
- Action can operate differently according to action qualifier..
Qualifier. Functions Action characteristic
N (Non-stored) Action is executed when step is activated.
R (overriding Reset) When step is activated, the action whose
qualifier is S, SD, DS, SL stops.
S (Set) If step is activated, it continues its execution
unit R qualifier is executed.
L (time Limited) If step is activated, it continues its execution
during setting time.
D (time Delayed) If step is activated, action starts after setting
time.
P (Pulse) If step is activated, it continues its execution
during one scan.
SD
(S
tored & time Delay)
If step is activated, action starts after setting
time and it continues its execution unit R
qualifier is executed. If R qualifier is executed
before setting time, action is not executed.
DS
(time D
elayed &
S
tored)
If step is activated, action starts after setting
time and it continues its execution unit R
qualifier is executed. If R qualifier is executed
before setting time or step is deactivated,
action is not executed.
SL
(S
tored & time Limited)
It continues its execution during setting time
or unit R qualifier is executed.
- You can input time expression such as “T#1h2m3s” “T#2m” “T#15s”.
- Action program can be written by LD or SFC.
activated status step
Action operating
R qualifier is executed
Setting time
1 scan execution
R
R
R
R
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