Mitsubishi Electric Q12DCCPU-V - Page 199

5
ACCESS VIA NETWORK MODULES
5.4 CC-Link IE Controller Network Module Access Function
5.4.2 Link device access
5 - 45
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
(2) Direct access
(a) What is direct access?
The direct access is a method of directly accessing a link device of a CC-Link IE
controller network module from a user program on the C Controller module,
independently of the link device refresh.
Since direct access does not use any internal link device buffer, the link device
refresh cycle and refresh parameters need not be set in CC IE Control utility.
(b) Directly accessible devices
The following devices are directly accessible.
Table 5.10 Directly accessible device list
Access method Accessible device
Direct access
LX
LY
LB
LW
SB
SW
Figure 5.43 Direct access
CC-Link IE controller network module
(Fourth module)
CC-Link IE controller network module
(Third module)
CC-Link IE controller network module
(Second module)
User program
ret = QBF_WriteLinkDevice();
ret = mdSend();
ret = mdRandW();
ret = mdDevSet();
ret = mdDevRst();
or
/* Data write */
ret = QBF_ReadLinkDevice();
ret = mdReceive();
ret = mdRandR();
or
/* Data read */
Direct access
SB
SW
LW
LB
Link devices
LX
LY
CC-Link IE controller network module (First module
)
C Controller module