Master Station Remote Device Station - Mitsubishi MELSEC-Q Series User Manual

5 DATA LINK PROCESSING TIME
5.2.2 Master station
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[Maximum value]
(a) Asynchronous mode
SM + LS 2 + 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
= 27.5 [ms]
(b) Synchronous mode
SM n + LS + Remote I/O station response time [ms]
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]
remote device station
(1) Master station (RX)
This indicates the time from the moment the signal is input to the remote device
station until the CPU device turns ON (OFF).
[Expression]
[Normal value]
(a) Asynchronous mode
SM + LS 1 + Remote device station processing 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 device station processing time is 1.5 ms.
SM + LS
= 20 + 3
= 24.5 [ms]
(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
2 + Remote I/O station response time [ms]
2 + 1.5
n + LS + Remote I/O station response time [ms]
1 + 3 + 1.5
remote device station (RX)
1 + Remote device station processing time [ms]
1 + 1.5
1 + Remote device station processing time [ms]
MELSEC-Q
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