Omron NT21 Series, Reference Manual

Page: 409 / 466

5-1 Section Examples of Actual Applications of Direct Access
400
5. Create the following ladder program so that the window is opened from the
host when the bit comes ON. (Word numbers are not shown in the ladder
program below, set the value when programming.)
error bit
error bit
Window screen No.
Value for X coordinate
Word of the
Screen No. in
window control
area
Word of X
coordinate in
Window con-
trol area
#0000
Word of Y
coordinate
in window
control area
Word of
Screen No. in
window con-
trol area
Value for Y coordinate
@MOV(21)
@MOV(21)
@MOV(21)
@MOV(21)
With this ladder program, the specified window is displayed at the desig-
nated position when the error bit comes ON, and the window is closed when
the error bit goes OFF.
Suggestions
•
Window can be moved closed or opened by the operation of touch switch,
when the window move touch switch is registered on the window like the exam-
ple above.
•
Detailed screen is displayed, or the screen is switched by pressing on the mes-
sage position in an alarm list on the window. (Refer to page 394)
•
Multiple windows can be displayed at the same time (up to three windows).
(Refer to page 229)
•
It is possible to display windows so that they do not overlap when multiple win-
dows are displayed, since the position of each window can be specified. (Refer
to page 300)
•
When the windows are overlapped, the displaying order of windows can be
changed by touching the window which is displayed under the other window.
(Refer to page 232)
Continuously Reading Out the Contents of a PC Word and Displaying a Trend Graph
by Backtracking
Utilizing the trend graph logging function and background function
Register a trend graph set as indicated below for the screen.
•
Line Properties:
Word No. of the PC word to be monitored
•
Data Logging:
Check mark set
•
Background:
Check mark set
Example:
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