Local Station Local Station - Mitsubishi A1SJ61BT11 User Manual

5 DATA LINK PROCESSING TIME
5.4.2 Local station local station
(1) Local station
Indicates the time from when a local station issues an instruction until it receives
a reply from another local station.
[Expression]
(a) For reading
+ LS × 3 + α + SL
MB = [SL
1
+ {(No. of reading points + 16)/16}
+ constant bps ] × N [ms]
SL : Send end local station sequence scan time
1
SL : Receive end local station sequence scan time
2
LS : Link scan time (Refer to section 5.2)
α : Send end internal processing time
No. of reading points 1 to 120 points
α
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 send end local station sequence scan time is 10ms, receive end 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
+ LS × 3 + α + SL
MB = [SL
1
+ {(No. of reading points + 16)/16}
+ constant bps ] × N
= [10 + 5 × 3 + 5 + 10 + 5 × 2 + {(20 + 16)/16}
= [10 + 5 × 3 + 5 + 10 + 5 × 2 + 3 × 5 + 5 + 5 × 7] × 1
= 105 [ms]
local station
+ LS × 2
2
121 to 240 points
LS LS × 2
625kbps
LS LS × 2
+ LS × 2
2
5 - 20
MELSEC-A
1
× LS + β
241 to 360 points
LS × 3
2.5Mbps 5Mbps
LS × 4 LS × 6
1
× LS + β
1
× 5 + 5 + 5 × 7] × 1
361 to 480 points
LS × 4
10Mbps
LS × 7