One Shot Block - Mitsubishi a2 Series Programming Manual

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2 Simple Application Controllers
6.8

One Shot Block

The function block gives a single Output pulse for a controlled duration of time. If the Set Time
is 0 seconds, the block will function like the Pulse block. The Reset Input returns the Output to
the OFF condition and will override the Input pin.
Table 6.9: One Shot Function Block
Function
0 0 0
I P O
C
O S
Note: The set time cannot be less than one scan time for the controller; otherwise, the
One Shot Function Block will not perform its assigned task for the time specified.
Users can monitor the scan time from the
dependent on the user-program; therefore, caution is needed as and when time units
are selected.
One Shot Operation
1 ) Time Priority
Input pin I
Input pin C
Output
2 ) Input priority
Input pin I
Input pin C
Output
set time
Set Item
I Input pin for one shot operation
C Clear input pin resets the state of the output regardless of the input
Time units: 10ms, 100ms or 1s (*Note)
FB The One Shot time T and t can be set using the chosen time units.
A Time or Input priority can be set.
The following items are applicable for the one shot function block:
1) A period of 0s to 32767s for a single pulse output can be set.
2) The output is turned ON during the single shot time duration as
and when the input pin receives a signal.
Output
3) The output is cleared as and when the clear pin receives a signal.
4) The following items are available for other function blocks:
a) One Shot
b) Current One Shot
ON OFF
set time set time
Description
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2 Series Controller. Scan time is
Function Blocks 6
6 - 18