Mitsubishi Electric MELSEC iQ-R User Manual page 190

Operation
The following shows operation of the one-shot timer when a trigger signal is input.
Input terminal 0
Output 0 of the input signal event
detection block
Output 1 of the input signal event
detection block
PRESET terminal of the counter
timer block
RUN terminal of the counter
timer block
Output terminal of the compare
block
Event input terminal 0
STOP terminal of the counter
timer block
Output terminal 0
Count value
Performed in the flexible high-speed I/O control module
No. Description
(1) When a signal is input to the input terminal 0, the signal is output from the output terminal 1 of the input signal event detection block. The output signal
turns the PRESET terminal of the counter timer block to High and to Low, performing the preset. (Count value: 0)
The signal output from the output terminal 0 of the input signal event detection block turns the RUN terminal of the counter timer block to High, starting
counting per clock cycle. In addition, outputs from the output terminal 0 start.
(The RUN terminal has a lower priority than the PRESET terminal. Thus, counting per clock cycle starts after the preset.)
(2) When the count value becomes 100, the Output terminal of the compare block turns to High. The event output terminal 0, event input terminal 0, and
the STOP terminal of the counter timer block turn to High in the described order. In addition, outputs from the output terminal 0 stop.
(3) When the STOP terminal of the counter timer block turns to High, counting per clock cycle stops.
4 BLOCK LINK EXAMPLES
188
4.2 One-shot Timer
High
(1)
Low
High
Low
High
Low
High
Low
High
Low
High
Low
High
Low
(3)
High
Low
High
Low
(2)
0 1• • • •100 1 1• • • •100 1 1• • • •100 1 1,2,3• • •