α
2 Simple Application Controllers
Function Blocks 6
6 - 89
6.32
Delayed One Shot Block
This block is equivalent to a combination of the Delay and the One Shot function block. Set an
ON delay for the rising pulse of the Input signal or an OFF delay for the falling pulse. This FB
will process the ON delay time before turning the Output ON for the OneShot pulse time and/or
delay the Output resetting until the OFF delay time has processed.
Table 6.46: Delayed One Shot Function Block
Note: The set time cannot be less than one scan time for the controller; otherwise, the
Delayed One Shot Function Block will not perform its assigned task for the time
specified. Users can monitor the scan time from the
α
2
Series Controller. Scan time is
dependent on the user-program; therefore, caution is needed as and when time units
are selected.
1 ) Delayed One-Shot (Delay starts when OFF to ON)
Function
Set Item
Description
I
Input pin for the delayed one shot function block
C
Clear pin for the delayed one shot function block
FB
1) Delay Time
a) OFF to ON
b) ON to OFF
2) Delay Time range: 0 to 32767
3) One Shot Time range: 0 to 32767
4) Time units: 10ms, 100ms or 1s (*Note)
5) When the Clear signal is set ON, the current Delay Time, current
One Shot Time will be cleared. The Output will reset OFF.
Output
The following items are available for another function block:
1) Word Output
a) Delay
b) Current Delay
c) One Shot
d) Current One Shot
0
0
0
O
D
O
I
S
C
P
Input pin
OFF
ON
Clear pin
OFF
ON
OFF
ON
Not
active
Reset
operation
OFF
Output pin
Delayed
Time
One-shot
Time
Reset delayed timer
(shorter than set time)
Delayed
Time
less than set time of
One-shot time
