Mitsubishi Electric Q12DCCPU-V - Link Data Transfer Processing Time Specifications; Link Data Transfer Processing; Processing Outline

5
ACCESS VIA NETWORK MODULES
5.3 MELSECNET/H Module Access Function
5.3.5 Link data transfer processing time specifications
5 - 31
1
OVERVIEW
2
SYSTEM CONFIGURATION
3
SPECIFICATIONS
4
FUNCTIONS
5
ACCESS VIA NETWORK MODULES
6
PREPARATORY PROCEDURES AND SETTING
7
I/O NUMBER ASSIGNMENT
8
MEMORIES AND FILES
5.3.5 Link data transfer processing time specifications
This section explains how to calculate the link data transfer time and transmission delay
time in the MELSECNET/H network system.
(1) Link data transfer processing
(a) Processing outline
Cyclic transmission uses LB/LW/LX/LY of a MELSECNET/H module.
The link relay (B) on the C Controller module side is explained here.
1) B0 in the LB buffer (sending side) is set to ON.
2) By a link device refresh, the B0 information in the LB buffer is stored in the link
data storage area (LB) of the sending side MELSECNET/H module.
3) By a link scan, the B0 information is stored in the receiving side MELSECNET/
H module's link data storage area (LB).
4) By a link device refresh, the B0 information in the link data storage area (LB) is
stored in the LB buffer of the receiving side C Controller module.
5) B0 in the LB buffer (receiving side) is set to ON.
* 1 Refresh parameters must be set for link device refreshes.
* 2 Network range assignment parameters must be set for link scans.
Figure 5.31 Link data transfer processing
Q12DCCPU-V
Q06CCPU-V
Q06CCPU-V-B
B0 turns ON.
1)
B0 turns ON.
5)
C Controller module
Internal link
device buffer
<LB buffer>
Link device
refresh cycle
C Controller module
Internal link
device buffer
<LB buffer>
Link device
refresh cycle
Link device
refresh
*1
*2 *2
2)
Link device
refresh
*1
4)
Link data
storage area
LB
MELSECNET/H module
Link data
storage area
LB
MELSECNET/H module
Link
scan
3)
Sending side Receiving side