Mitsubishi Electric MELSEC Q Series Reference Manual page 98

3 SPECIFICATIONS
[Y transmission delay time (T
Remote master station
Link scan time
Remote I/O station
Remote master station
Link scan time
Remote I/O station
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)] (END synchronization)
DY
[Remote master station scan time (Sm) > link scan time (LS)]
= (Sm + m) + LS + T
T
DY
The remote master station sets Y
Y
to on near 0 step.
Sm Sm
m
0 E 0 E
LS
[Remote master station scan time (Sm) < link scan time (LS)]
= (Sm + m)
T
DY
The remote master station sets Y
Y
to on near 0 step.
Sm Sm
m
0 E 0 E
LS
Sm : Remote master station scan time
m
: Remote master station link refresh time
LS : Link scan time
T : I/O refresh time
RIOR
: Round up the decimal point of the result operation [LS/(Sm + m)]
round up
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 (LS)]
= (Sm + m) + LS + T
T
DY
• [Remote master station scan time (Sm) < Link scan time (LS)]
= (Sm + m)
T
DY
[ms]
RIOR
Sm Sm
m m m
0 E 0 E
LS LS
T
RI
OR
ON
T
DY
round up [LS/(Sm + m)] + LS + T
Sm Sm
m m m
0 E 0 E
LS
T
DY
) is calculated as follows:
DY
[ms]
RIOR
round up[LS/(Sm + m)]
MELSEC-Q
0: 0 step
E: END step
Sm Sm
m m
0 E 0 E 0
LS LS
[ms]
RIOR
0: 0 step
E: END step
Sm Sm
m m
0 E 0 E 0
LS
T
RI
OR
ON
2 + LS + T [ms]
RIOR
Sm
Sm
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