Mitsubishi Electric QJ71LP21 Reference Manual page 75

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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)]
DY
[Remote master station scan time (Sm) > link scan time (LS)]
= (Sm + αm) + LS + T
T
DY
Remote station sets Y
Y
to on near 0 step.
Sm Sm
αm αm
0 E 0 E 0
LS
T
DY
[Remote master station scan time (Sm) < link scan time (LS)]
= (Sm + αm) round up [LS/(Sm + αm)] + LS + T
T
DY
Remote station sets Y
Y
to on near 0 step.
Sm Sm
αm αm
0 E 0 E 0
LS
Sm : Remote master station scan time
αm
: 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 + αm)]
round up
[ms]
RIOR
Sm Sm
αm αm
E 0 E 0
LS LS LS
T
RI
OR
ON
Sm Sm
αm αm
E 0 E 0
LS
T
DY
MELSEC-Q
0: 0 step
E: END step
Sm Sm Sm
αm αm
E 0 E 0
LS
[ms]
RIOR
0: 0 step
E: END step
Sm Sm Sm
αm αm
E 0 E 0
LS
T
RI
OR
ON
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