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MELSEC-Q
3 SPECIFICATIONS
[W input transmission delay time (T
DB1)] (END synchronization)
[Remote master station scan time (Sm) > link scan time (LS)]
T
DB1 = (Sm + m) 2
+
Sm + TRBF [ms]
LS
T
RBF
TDB1
Intelligent function
module
Buffer memory
MOV W0 D0
Remote master station
Link scan time
Remote I/O station
0E
Sm
m
0E
Sm
m
0E
Sm
m
0E
Sm
m
0E
Sm
m
0E
Sm
LS LS LS LS
0: 0 step
E: END step
[Remote master station scan time (Sm) < link scan time (LS)]
T
DB1 = (Sm + m) round up [LS/(Sm + m)] 2 + Sm + TRBF [ms]
LS
T
RBF
TDB1
Buffer memory
MOV W0 D0
LS
LS
Intelligent function
module
Remote master station
Link scan time
Remote I/O station
0E
Sm
m
0E
Sm
m
0E
Sm
m
0E
Sm
m
0E
Sm
m
0E
Sm
m
0
Sm
0: 0 step
E: END step
Sm
m
LS
T
RBF
round up
: Remote master station scan time
: Remote master station link refresh time
: Link scan time
: Intelligent function module buffer memory refresh time
: Round up the decimal point of the result operation [LS/(Sm + m)]
POINT
The same formula is used to calculate the transmission delay time (TDB1)
independently of the Block send/receive data assurance per station setting.