Transmission Delay Time - Mitsubishi Electric MELSEC Q Series User Manual

3.7.2
The transmission delay time (time that data reaches to a destination) is described as below.
(1) Master station
The following formula calculates the time after a signal is input to a remote station until the CPU module device
(X) turns on (off).
[Calculation formula]
SM × 2 + (2 - n)
SM: Sequence scan time of master station
LS: Link scan time (
n: SM ÷ LS (Round off the calculated value to the nearest integer.)
*1
Ex.
(2) Master station
The following formula calculates the time after the CPU module device (Y) is turned on (off) until a remote station
output turns on (off).
[Calculation formula]
SM + LS × 2 + Output response time of remote station (ms)
SM: Sequence scan time of master station
LS: Link scan time (
Ex.
40
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Transmission delay time

Remote station (Input)
←
*1
× LS + Input response time of remote station (ms)
Page 39, Section 3.7.1)
Regarded as "0" when 0 or less is calculated
When the sequence scan time of the master station is 5ms, the link scan time is 1.2ms, and the input
response time of the remote station is 1.5ms:
*1
SM × 2 + (2 - n) × LS + Input response time of remote station (ms)
*1
= 5 × 2 + (2 - 4) × 1.2 + 1.5 [n = 4 (5/1.2 = 4.16..., Round off the calculated value to the nearest integer.)]
= 11.5 [ms]
Remote station (Output)
→
Page 39, Section 3.7.1)
When the sequence scan time of the master station is 5ms, the link scan time is 1.2ms, and the output
response time of the remote station is 0.5ms:
SM + LS × 2 + Output response time of remote station (ms)
= 5 + 1.2 × 2 + 0.5
= 7.9 [ms]
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