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펄스 시그널이다
MASTER-K 에서 [D M000] 같은 기능이다.
MASTER-K 에서는 출력에 코일을 연결한다.-----[D M000]
출력 조건이 성립되면 M000 --| |-- a접접을 라인에 연결시켜 사용한다.
하지면 AB-PLC는 출력을 사용하지 않아도 모든 접점을 직접 삽입할 수 있다
위 그림은 I:1/0 조건이 ON 되면 B3:0/1 출력 코일이 1SCAN ON 되어 있다가 1SCAN이
완려되면 B3:0/1은 OFF 된다.
사용 할 수 있는 디바이스 영역은 아래와 같다.
I, O, S, B, T, C, R, 영역을 사용할 수 있다.
[-원본글-]
The OSR instruction is a retentive input instruction that triggers an event to occur one time. Use
the OSR instruction when an event must start based on the change of state of the rung from
FALSE-to-TRUE.
The event can be triggered by a pushbutton or some type of sensor. The OSR instrucion is
placed in the ladder logic before the output instruction. The output is referenced as the one-shot
within the program. A bit address must be entered for the OSR whether it is a binary file or an
integer file address. The bit address can not be used anywhere else in your program. The
address assigned to the OSR is not the address referenced by the program, nor does it indicate
the state of of the OSR. The address only allows the OSR to remember which state the rung was
previously in. The way the OSR instrucion works is: When the rung conditions preceeding the
OSR go from false-to-true, the OSR instruction goes true also but for only one scan.
Programming Problem
Develop a ladder rung that will cause the output B3:1 to turn on for only one cycle.In this
example, a part is in on a conveyor, when the part hits a trigger switch it will cause the part to be
ejected.The only problem associated with this is when the switch is hit, it causes what is known
as a bounce.
The OSR in the ladder will allow one clear pulse to go the the ejecter and then it will disregard
the other pulses being sent associated with the bounce.
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