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6.2 Transmission Delay Time
6.2.3 Link data send/receive time (Link scan)
6
LINK DATA SEND/RECEIVE PROCESSING AND
PROCESSING TIME
6.2.3 Link data send/receive time (Link scan)
Link data send/receive time is calculated by the following formulas.
(1) MELSECNET data link system
(a) In MELSECNET mode
(b) In MELSECNET II mode
(c) In MELSECNET II composite mode
(d) Obtain values for K, K
R, and KL in the formulas from the following table.
Table 6.5 Constants (K, KR, KL)
Constant
Total number of slave stations
1 to 8 9 to 16 17 to 24 25 to 32 33 to 40 41 to 48 49 to 56 57 to 64
K 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0
KR 1.3 1.3 1.4 1.4 1.5 1.5 1.6 1.6
KL 2.0 2.0 2.1 2.1 2.2 2.2 2.3 2.3
LS = K + KR (Total No. of remote I/O slave stations) + KL (Total No. of local slave stations) + KB [ms]
LS = K + KL
(Total No. of local slave stations + No. of local stations assigned to latter half of link parameters) + K
B
[ms]
LS = K + K
R (Total No. of remote I/O slave stations) + KL
(Total No. of local slave stations + No. of local stations assigned to latter half of link parameters) + KB [ms]