4
FUNCTIONS
4.4 MELSECNET/H Module Access Function
4.4.5 Link data send/receive processing time specifications
4 - 40
1
OVERVIEW
2
SYSTEM
CONFIGURATION
3
SPECIFICATIONS
4
FUNCTIONS
5
SETTING AND
PROCEDURES
6
I/O NUMBER
ASSIGNMENT
7
MEMORIES AND
FILES
8
INSTALLING /
UNINSTALLING
(4) Reduced link scan time
The link device refresh data and link scan data (LB/LW) in normal cyclic transmission
can be reduced by assigning the data that do not require high speed transmission to
the extended area (2000
H
to 3FFF
H
) for making low-speed cyclic transmission.
Figure 4.37 Reduced link scan time
Station
No.1
Station
No.3
Station
No.2
Station
No.1
Station
No.3
Station
No.2
Station
No.1
Station
No.3
Station
No.2
1FFF
3FFF
H
2000H
C Controller
module
Internal link device
buffers
MELSECNET/H module
Network range
assignment parameters
Link device
refresh
Normal cyclic
transmission range
Low-speed cyclic
transmission range
Low-speed link refresh
0
H
0H