Mitsubishi MELSEC Q Series User Manual page 133

5 DATA LINK PROCESSING TIME
5.2.3 Master station
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remote device station (Ver. 2 compatible slave 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
SM: Master station sequence program scan time
LS: Link scan time (see Section 5.1)
m: Constant (expanded cyclic setting)
Expanded cyclic setting
m
(Example) When the sequence scan time for the master station is 20 ms, the link scan
time is 3 ms, the expanded cyclic setting is "double", and the remote device
station processing time is 1.5 ms.
SM + LS
= 20 + 3
= 30.5 [ms]
(b) Synchronous mode
(SM n)
SM: Master station sequence program scan time
LS: Link scan time (see Section 5.1)
n: (LS
rounded up to the next whole number
m: Constant (expanded cyclic setting)
Expanded cyclic setting
m
(Example) When the sequence scan time for the master station is 20 ms, the link scan
time is 3 ms, the expanded cyclic setting is "double", and the remote device
station processing time is 1.5 ms.
(SM
= (20
= 21.5 [ms]
remote device station (RX)
m + Remote device station processing time [ms]
single
1
1 m + Remote device station processing time [ms]
1 3 + 1.5
1 + Remote device station processing time [ms]
m/SM)value when fractions following the decimal point are
single
1
n) 1 + Remote device station processing time [ms]
1) 1 + 1.5
MELSEC-Q
double quadruple
3 7
double quadruple
3 7
octuple
15
octuple
15
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