Mitsubishi MELSEC Q Series User Manual page 126

5 DATA LINK PROCESSING TIME
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(b) Synchronous mode
(SM n)
SM: Master station sequence program scan time
LS: Link scan time (see Section 5.1)
n: (LS/SM) value when fractions following the decimal point are
rounded up to the next whole number
(Example) When the sequence scan time for the master station is 20 ms, the link
scan time is 3 ms and the remote I/O station response time is 1.5 ms.
(SM
= (20
= 41.5 [ms]
(2) Master station (RY)
This indicates the time from the moment the CPU device turns ON (OFF) until
the remote I/O station output turns ON (OFF).
[Expression]
[Normal value]
(a) Asynchronous mode
SM + LS 1 + Remote I/O station response time [ms]
SM: Master station sequence program scan time
LS: Link scan time (see Section 5.1)
(Example) When the sequence scan time for the master station is 20 ms, the link
scan time is 3 ms and the remote I/O station response time is 1.5 ms.
SM + LS
= 20 + 3
= 24.5 [ms]
(b) Synchronous mode
SM n + LS
SM: Master station sequence program scan time
LS: Link scan time (see Section 5.1)
n: (LS/SM)value when fractions following the decimal point are
rounded up to the next whole number
(Example) When the sequence scan time for the master station is 20 ms, the link
scan time is 3 ms and the remote I/O station response time is 1.5 ms.
SM
= 20
= 24.5 [ms]
2 + Remote I/O station response time [ms]
n) 2 + Remote I/O station response time [ms]
1) 2 + 1.5
remote I/O station (output)
1 + Remote I/O station response time [ms]
1 + 1.5
2 + Remote I/O station response time [ms]
n + LS + Remote I/O station response time [ms]
1 + 3 + 1.5
MELSEC-Q
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