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MELSEC-
3   SPECIFICATIONS 
 
3.8 Data Link Processing Time 
The CC-Link side data link and CC-Link/LT side data link operate asynchronously. 
 
3.8.1 CC-Link link scan time 
Refer to the user's manual of the master module. 
 
3.8.2 CC-Link/LT link scan time 
This section explains the CC-Link/LT link scan time. 
 
[Link scan time (LS)] 
LS = a + (b 
 N)   c [ s] 
a: Constant 
b: Constant 
c: Constant 
N: Last station number 
 
Transmission speed  2.5 Mbps  625 kbps  156 kbps 
a 22 88 353 
4-point mode 46 41 37 
8-point mode 56 51 47 
b 
16-point mode 76 71 67 
c  0.4 1.6 6.4 
 
(ms)Link scan time
Number of 
stations
Link scan time 
(2.5Mbps when 8 stations (4 occupied stations    2 modules) are occupied)
0
14 28 56
0
0.5
1.0
1.5
2.0
2.5
16-point mode
8-point mode
4-point mode