Mitsubishi QJ71LP21 Reference Manual page 79

3 SPECIFICATIONS
[Instruction transmission delay time (M
Remote master station
Link scan time
Remote I/O station
Remote master station
Link scan time
Remote I/O station
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(b) REMFR/REMTO/READ/WRITE instructions
REMFR/REMTO/READ/WRITE instructions transmission delay time is the
sum of the following.
• Remote master station scan time (Except for the link refreshing time)
• Remote master station refresh time
• Link scan time
Calculate the sum as shown below:
)]
D
[Remote master station scan time (Sm) > link scan time (LS)]
= (Sm + αm)
M 3 [ms]
D
Instruction
Sm Sm Sm Sm
αm αm αm
0 E 0 E 0 E 0 E
LS LS
Instruction execution
[Remote master station scan time (Sm) < link scan time (LS)]
= (Sm + αm) round up [LS/(Sm + αm)]
M
D
Instruction
Sm Sm
αm
0 E 0 E
LS LS
Sm : Remote master station scan time
αm
: Remote master station link refresh time
LS : Link scan time
Mrα : Instruction access data refresh time
: Round up the decimal point of the result operation [LS/(Sm + αm)]
round up
Completion flag ON
Sm Sm Sm
αm αm αm αm
0 E 0 E 0 E
LS
M
rα
M
D
Completion flag ON
Sm Sm
αm αm
0 E 0 E
LS LS
M
rα
Instruction execution
M
d
MELSEC-Q
Sm Sm Sm Sm
αm αm αm
0 E 0 E 0 E 0 E
LS LS
0: 0 step
E: END step
3 [ms]
Sm Sm
αm αm
0 E 0 E
LS
0: 0 step
E: END step
αm
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