Mitsubishi Electric MELSEC Q Series Reference Manual page 99

3 SPECIFICATIONS
[W input transmission delay time (T
Remote master station
Link scan time
Remote I/O station
Intelligent function
Remote master station
Link scan time
Remote I/O station
Intelligent function
module
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)] (END synchronization)
DB1
[Remote master station scan time (Sm) > link scan time (LS)]
= (Sm + m)
T
DB1
Sm Sm
m
0 E 0
LS LS
T
RBF
Buffer memory
module
[Remote master station scan time (Sm) < link scan time (LS)]
= (Sm + m)
T
DB1
Sm Sm
m m
0 E 0 E
LS
T
RBF
Buffer memory
Sm : Remote master station scan time
m
: Remote master station link refresh time
LS : Link scan time
T : Intelligent function module buffer memory refresh time
RBF
: Round up the decimal point of the result operation [LS/(Sm + m)]
round up
POINT
The same formula is used to calculate the transmission delay time (T
independently of the Block send/receive data assurance per station setting.
2 + Sm + T [ms]
RBF
Sm Sm
m m
E 0 E 0
LS LS
T
DB1
round up [LS/(Sm + m)]
Sm Sm
m m
0 E 0 E 0
LS
T
DB1
MELSEC-Q
MOV W0 D0
Sm Sm
m m
E 0 E 0 E
LS
0: 0 step
E: END step
2 + Sm + T
RBF
MOV W0 D0
Sm Sm
m m
E 0 E 0
LS
0: 0 step
E: END step
DB1
[ms]
Sm
)
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