Mitsubishi Electric MELSEC Q Series Reference Manual page 103

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
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DB1
[Remote master station scan time (Sm) > link scan time (LS)]
= Sm + m + Sm + T
T
DB1
Sm Sm
m
0 E 0
LS LS
T
RBF
module
[Remote master station scan time (Sm) < link scan time (LS)]
2 + Sm + m + Sm + T
T = LS
DB1
Sm Sm
m
0 E 0
LS
T
RBF
module
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
POINT
When the "Block send/receive data assurance per station" box is checked, the
transmission delay time (T
• Remote master station scan time (Sm) > Link scan time
= (Sm + m)
T
DB1
• Remote master station scan time (Sm) < Link scan time
3 + Sm + m + Sm + T
T = LS
DB1
)] (END asynchronization)
[ms]
RBF
Sm Sm
m m
E 0 E 0
LS LS LS
Buffer memory
T
DB1
[ms]
RBF
Sm Sm
m m
E 0 E 0
LS
Buffer memory
T
DB1
) is calculated as follows:
DB1
2 + Sm + T + LS [ms]
RBF
[ms]
RBF
MELSEC-Q
MOV W0 D0
Sm Sm
m m
E 0 E 0 E
LS LS
0: 0 step
E: END step
MOV W0 D0
Sm Sm
m m
E 0 E 0 E
LS
0: 0 step
E: END step
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