5
- 46
5.4 CC-Link IE Controller Network Module Access Function
5.4.2 Link device access
5
ACCESS VIA NETWORK MODULES
(c) Selection of internal buffer access or direct access
Select a suitable access method referring to the following.
1) Data suitable for internal buffer access
If a link device is used frequently or the block data assurance per station is
needed for a link device, the data of the link device are suitable for internal
buffer access.
For this kind of data, set refresh parameters to utilize them for internal buffer
access.
2) Data suitable for direct access
Data of a link device that is not used so frequently are suitable for direct
access.
Exclude these data from the refresh parameter setting, and utilize them for
direct access.
POINT
To enable the block data assurance per station, set as follows.
1) Select "Block send data assurance per station" or "Block receive data
assurance per station" in Parameter settings (Supplementary settings) for
CC-Link IE controller network module (control station).
This Parameter settings (Supplementary settings) can be configured in CC IE
Control utility when the control CPU of the CC-Link IE controller network
module (control station) is a C Controller module, or in GX Works2/GX
Developer when the control CPU is a programmable controller CPU.
2) In the <<Parameter settings>> tab of CC IE Control utility, set 10 or higher for
"Link device refresh cycle" and configure "Refresh parameters" settings.
If 0 is set for "Link device refresh cycle" with "Block data assurance per
station" enabled, cyclic transmission will not be performed properly and a data
link error may occur.
Remark
For CC IE Control utility, bus interface functions, and MELSEC data link functions,
refer to the following manual.
C Controller Module User's Manual (Utility Operation, Programming)
Summary of Contents for Q06CCPU-V
Page 2: ......
Page 612: ...APPX 48 Appendix 11 Functions Added by Version Upgrade APPENDICES Memo ...
Page 617: ......