Mitsubishi Electric Q12DCCPU-V User Manual page 216

7
CC IE CONTROL UTILITY
(7) Supplementary settings screen
Item
Constant scan
Block data assurance per station
Transient settings
Constant scan time assurance
Max. number of transients per
station
End
button
Cancel
button
Constant scan time assurance
Selected
Deselect
7
- 33 7.5 Parameter Settings Tab
The Supplementary settings screen is useful for advanced applications.
Use the default settings normally.
Table 7.22 Description of Supplementary settings screen
Constant scan is a feature provided for keeping a fixed link scan time.
Set a value if variation in link scan time undesirable. (In increments of ms)
(Default: "(Blank)", Setting range: 1 to 500, "(Blank)")
Select this to assure the station-based link data consistency in cyclic transmissions.
No interlock program is needed for operation of multiple word data if this item is selected.
Note that this function
module and a CC-Link IE Controller Network module.
When selecting this item, make sure the following parameters are set.
•"Link device refresh cycle" on the "Parameter settings" tab
( Page 7-23, Section 7.5 (2))
•Refresh parameters on the "Refresh parameter settings" tab
( Page 7-27, Section 7.5 (4))
(Default: Checked (Allow))
Set execution conditions for transient transmissions.
Set whether or not to assure the constant scan time. (
(Default: Checked (Enabled))
Set the number of transient transmissions that one station can execute during one link scan.
(Default: 2, Setting range: 1 to 10)
Saves the settings and closes the "Supplementary settings" screen.
Closes the "Supplementary settings" screen without saving the settings.
* 1 A two-word (32-bit) link data, such as a present value of a positioning module, may be divided into
two one-word data (new 16-bit data and old 16-bit data) at a timing of cyclic transmission. This
function prevents this situation from occurring.
Set link device refresh processing between a C Controller module and a CC-Link IE Controller
Network module on the "Refresh parameter settings" screen. (
(a) Link scan operations by the Constant scan time assurance setting
Table 7.23 Link scan operations by Constant scan time assurance setting
•Link scan time is kept constant.
•Link scan time is longer compared with the deselected setting.
•The larger the "Max. number of transients per station" value is, the longer the link scan time will
become.
•Link scan time varies when a transient transmission is requested.
•The larger the "Max. number of transients per station" value is, the larger the link scan time
variation will become.
Figure 7.29 Supplementary settings screen
Description
*1
is available only for link device refresh processing between a C Controller
Link scan operation
*1
Page 7-33, Section 7.5 (7) (a))
Page 7-27, Section 7.5 (4))