Mitsubishi A1SJ61BT11 User Manual page 120

5 DATA LINK PROCESSING TIME
(2) Local station
Indicates the time from when a local station issues an instruction until it receives
a reply from the master station.
[Expression]
(a) For reading
MB = [SL + LS × 3 + α + SM + LS + {(No. of reading points +16)/72}
× LS + β + constant bps] × N [ms]
SM : Master station sequence scan time
SL : Local station sequence scan time
LS : Link scan time (Refer to section 5.2)
α : Send end internal processing time
LS
β
: Receive end internal processing time
LS
[Constant bps]
Transmission speed 156kbps
constant bps
N : No. of execution instructions simultaneously
1 : Raise the decimals to a unit
(Example) When master station sequence scan time is 10ms, local station sequence
scan time is 10ms, link scan time is 5ms, no. of reading points is 20 words,
transmission speed is 10Mbps, no. of execution instructions simultaneously
is 1
MB = [SL + LS × 3 + α + SM + LS + {(No. of reading points +16)/72}
× LS + β + constant bps] × N
= [10 + 5 × 3 + 5 + 10 + 5 + {(20 + 16)/72} × 5 + 5 + 5 × 7] × 1
= [10 + 5 × 3 + 5 + 10 + 5 + 1 × 5 + 5 + 5 × 7] × 1
= 90 [ms]
Master station
625kbps
LS LS × 2
5 - 18
MELSEC-A
2.5Mbps 5Mbps
LS × 4 LS × 6
1
10Mbps
LS × 7
1