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How Do I Program A One-Shot Output?




In a one-shot program, as long as the trigger input stays ON for longer than a certain time (see note), the output bit will be turned ON for a specific period of time regardless of how long the trigger input is ON.

Note:Usually this time is equal to the time of a one CPU Unit cycle.
As shown in Figure 1, when the trigger input (CIO 0.00) is ON for either 1.0 s or 2.5 s, the pulse output bit (CIO 2.00) will be turned ON for 1.5 s.


Program Operation
OFF Operation of Pulse Output Bit (CIO 2.00)

  • If the Trigger Input Bit ON Time Is Less Than the One-shot Time:
    The pulse output bit (CIO 2.00) is turned OFF by ---|/|--- T0001 programmed for the self-holding work bit (W0.00).
  • If the Trigger Input Bit ON Time Is Greater Than the One-shot Time:
    The pulse output bit (CIO 2.00) is turned OFF by ---|/|--- T0001 programmed on the same rung as the pulse output bit.
 

 




 



 




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Created 2008-10-31
Modified 2009-04-28
Views 2851

 

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