Mitsubishi MELSEC Q Series User Manual page 147

5 DATA LINK PROCESSING TIME
5.2.5 Master station
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local station (Ver. 2 compatible slave station)
(1) Master station (RX)
This indicates the time from the moment the local station CPU device turns ON
(OFF) until the master station 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)
SL: Local station sequence program scan time
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
sequence scan time for the local station processing time is 10 ms.
SM + LS
= 20 + 3
= 42 [ms]
(b) Synchronous mode
(SM n)
SM: Master station sequence program scan time
SL: Local 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
sequence scan time for the local station processing time is 10 ms.
(SM
= (20
= 30 [ms]
local station (RY)
m + 1) + SL [ms]
single
1
(1 m + 1) + SL [ms]
(1 3 + 1) + 10
1 + SL [ms]
m/SM)value when fractions following the decimal point are
single
1
n) 1 + SL [ms]
1) 1 + 10
MELSEC-Q
double quadruple
3 7
double quadruple
3 7
octuple
15
octuple
15
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