2-2SectionAreas for Control/Notification
68
Window type Screen No.
X coordi-
nate
Y coordi-
nate
Status
Global window Retains the existing value Remain opened
Local window Cleared to 0 Closed (*)
* If the local window open attribute is set for the screen switched to, the local
window opens.
When the Screen Is Switched to System Screen, Error Screen or System
Menu, while the Window Is Being Displayed.
The behavior depends on the screen type as shown below. (Even when the glob-
al window and local window were displayed before screen switching, the each
screen also behaves as the table below. )
Window type Screen No.
X coordi-
nate
Y coordi-
nate
Status
Global window Retains the existing value Closed
Local window Cleared to 0 Closed
If a standard screen or overlapping screens are displayed again, the same glob-
al window will be opened at the same position but the local window will not be
opened.
System screens that close global window are as follows:
• System initializing screen (screen number 9000)
• Programming Console function screen (screen number 9020)
• Device Monitor function screen (screen number 9021, 9022, or 9023)
With Occurrence history screen (screen number 9001) and frequency history
screen (screen number 9002) global window remains opened.
Data is written to the window control area from both the PT and the host. The
meaning of the data differs according to whether it is written from the PT or the
host.
When the Data Is Written from the Host
To switch, open, close or move a window on the PT by an instruction from the
host, write the window screen number or coordinates to the window No.. X coor-
dinate or Y coordinate as 4-digits BCD or hexadecimal. Whether the values are
BCD or hexadecimal is determined by the setting for numeral storage type in the
PT configuration settings made with the Support Tool.
By changing the screen No.. window can be switched, opened or closed.
It is possible to move the window position by changing the X coordinate and Y
coordinate.
Local Window1 opens
(Window screen No.125)
Bottom left coordinate (60, 99)
Window control area
Local Window1
← 0125
← 0060
← 0099
Screen No.
X coordinate
Y coordinate
PT PC
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