5
ACCESS VIA NETWORK MODULES
5.4 CC-Link IE Controller Network Module Access Function
5.4.5 Link data transfer processing time specifications
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OVERVIEW
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SYSTEM
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3
SPECIFICATIONS
4
FUNCTIONS
5
ACCESS VIA NETWORK
MODULES
6
PREPARATORY
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SETTING
7
I/O NUMBER
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8
MEMORIES AND FILES
(b) Transmission delay time calculation example
The following shows a calculation example for cyclic transmission delay time in a
single network system.
(System configuration and conditions)
1) Link device refresh time
2) Link scan time
* 1 For details of the link scan time, refer to the MELSEC-Q CC-Link IE Controller Network Reference
Manual.
3) Cyclic transmission delay
Table 5.13 System configuration and conditions
Item Description
CPU on receiving station C Controller module
Total number of stations per network 2 (Control station: 1, Normal station: 1)
Total link device points
LB/LW 1024 points
LX/LY 0 points
SB/SW 0 points
Link device refresh cycle 100ms
Transient transmission None
Block data assurance per station Enabled
CC-Link IE controller network module Installed to Slot 0 of main base unit
Faulty station None
Table 5.14 Example of transmission delay time calculation
Calculated
value
Transmission delay when LT > LS [ms]
Block data assurance per station enabled
Normal
value
(LT + T) 1.5 + LS 0.5 + (LR + R) 0.5
(100 + 1.39)
1.5 + 1.25 0.5 + (100 + 1.39) 0.5 = 203.405[ms]
Max. value
(LT + T) 2 + LS 1 + LR + R
(100 + 1.39) 2 + 1.25 1 + 100 + 1.39 = 305.42[ms]
R 1.39(ms)
1.39(ms)
Total link device refresh time on sending side
Total link device refresh time KM1 KM2
LW
16
1
Total link device refresh time on receiving side
LB LX LY
T 1.0 0.36 10
-3
1024 0 0
1024
Link scan time LS
[KB + (n 56) + {LB + LY + (LW 16)} 8 0.016
+ (N
T T 30)] 1000 + NC
[1100 + (2 56) + {1024 + 0 + (1024 16)} 8 0.016
+ (0 2 30)] 1000
1.25(ms)
*1
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