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MELSEC-Q
3 SPECIFICATIONS
[W output transmission delay time (T
DB2)] (END synchronization)
[Remote master station scan time (Sm) > link scan time (LS)]
T
DB2 = (Sm + m)
+
LS + TRBF [ms]
LS
T
RBF
TDB2
Buffer memory
MOV D100 W100
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
0: 0 step
E: END step
LS LS LS LS
[Remote master station scan time (Sm) < link scan time (LS)]
T
DB2 = (Sm + m) round up [LS/(Sm + m)] + LS + TRBF [ms]
LS
T
RBF
TDB2
Buffer memory
MOV D100 W100
0
Sm
LS LS
Intelligent function
module
Remote master station
Link scan time
Remote I/O station
0: 0 step
E: END step
0E
Sm
m
0E
Sm
m
0E
Sm
m
0E
Sm
m
0E
Sm
m
0E
Sm
m
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
When the "Block send/receive data assurance per station" box is checked, the
transmission delay time (T
DB2) is calculated as follows:
• [Remote master station scan time (Sm) > Link scan time (LS)]
T
DB2 = (Sm + m) + LS + TRBF [ms]
• [Remote master station scan time (Sm) < Link scan time (LS)]
T
DB2 = (Sm + m) x round up[LS/(Sm + m)] x 2 + LS + TRBF [ms]