B&B Electronics VFG3000 - Manual - Manual (Page 154)

D EFINING S YSTEM A CTIONS V LINX F IELDBUS G ATEWAY M ANAGER U SER M ANUAL
P AGE 138
in many cases, actions that you may think need to be run on each update can be
performed using triggers, or by using mapping blocks.
• The Parent Page property is used to indicate the page to be displayed when the
Gateway’s Exit key is pressed while this page is active. Selection of this page
can be overridden using the techniques below.
• The Next Page property is used to indicate the page to be displayed when the
Gateway’s Next key is pressed while this page is active, and when the cursor is
on the last data entry field on the page. This selection can also be overridden.
• The Previous Page property is used to indicate the page to be displayed when the
Gateway’s Prev key is pressed while this page is active, and when the cursor is
on the first data entry field on the page. This selection can also be overridden.
• The Period property is used to define the time in seconds to wait without any
user interaction occurring before performing the action specified in the On
Timeout property. These properties are typically used to remove a popup or to
return to some sort of menu screen after several seconds of inactivity.
If you have too many data entry fields to fit on a single page, the Next Page and Previous
Page properties can be used to link together a series of pages to allow the operator to edit the
fields in sequence. Fieldbus Gateway Manager will automatically position the cursor
appropriately, such that if the
Prev key is pressed on the first field of a page, the previous
page will be activated with the cursor on the last field of that page.
D
EFINING
S
YSTEM
A
CTIONS
In addition to the various actions that can be defined via page properties, Fieldbus Gateway
Manager gives you the ability to define an action(s) to be run before the system starts, when
the system first starts, and an action(s) to be run once a second or on page updates, no matter
which page is displayed. These actions can be accessed by selecting the Pages icon in the left-
hand pane of the User Interface window. You should refer to previous warnings regarding the
use of the On Update property.
A
DDITIONAL
S
YSTEM
P
ROPERTIES
In addition to the system actions described above, there are two property pages accessed by
selecting the Pages icon that gives you access to a number of other system-wide parameters.
The Basic tab covers the following parameters…