Response Delay Time - Mitsubishi MELSEC-Q Series User Manual

12
COUNTER FUNCTION
12.8

Response Delay Time

When using the counter function, response delay time needs to be considered.
(1) Operation and control affected by response delay time
(2) Response delay time
Response delay
time
Response delay time is the maximum time to perform the following operation and
control.
(a) Time before count operation starts after the CH
Y1E) is turned ON.
(b) Time before the value in the "
command (Y18 to Y1A) is turned ON.
Response delay time is calculated by the following formula:
Scan time of sequence
=
program
(a) Scan time of sequence program
Scan time affects the delay of I/O signals.
The use of direct access inputs (DX) and direct access outputs (DY) can minimize
the delay.
(b) Control cycle (2.5ms) of QD72P3C3
Up to 5ms (Control cycle (2.5ms) of QD72P3C3
time when the QD72P3C3 reads the output signal and buffer memory updated by
the sequence program and completes processing.
count enable command (Y1C to
Count value" is updated after the CH
Md.3
(
Control cycle (2.5ms)
+
of QD72P3C3
2) of delay occurs during the
12.8 Response Delay Time
9
10
preset
11
)
2 [ms]
12
13
14
15
12
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