Mitsubishi A1SJ61BT11 User Manual page 123

5 DATA LINK PROCESSING TIME
(b) For writing
MB = [SL + LS × 2 + {(No. of writing points + 16)/16}
1
+ SL
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 writing 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 writing
points is 20 words, transmission speed is 10Mbps, no. of execution
instructions simultaneously is 1
MB = [SL + LS × 2 + {(No. of writing points + 16)/16}
1
+ SL
= [10 + 5 × 2 + {(20 + 16)/16}
= [10 + 5 × 2 + 3 × 5 + 5 + 10 + 5 × 3 + 5 + 5 × 7] × 1
= 105 [ms]
+ LS × 3 + β + constant bps] × N [ms]
2
121 to 240 points
LS LS × 2
625kbps
LS LS × 2
+ LS × 3 + β + constant bps] × N
2
5 - 21
1
× LS + α
241 to 360 points
LS × 3
2.5Mbps 5Mbps
LS × 4 LS × 6
1
× LS + α
1
× 5 + 5 + 10 + 5 × 3 + 5 + 5 × 7] × 1
MELSEC-A
361 to 480 points
LS × 4
10Mbps
LS × 7