Omron Programmable Terminals NT631, Инструкции по эксплуатации

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589
Examples of Actual Applications of Direct Access
Section 10-1
(3) Register an alarm list, set as indicated below, for any screen.
- “Color” setting, “Frame”:
Black (same as the background color of other screens)
- “Color” setting, “Background”, “ON”:
Red
- List Settings:
Set the “Start Bit Table Entry” and “No. of Bits Referenced” so as to include
the bit memory table set in (2) above.
(4) Set overlapping screens so that all screens displayed on the PT are over-
lapped by the screen created in (3).
Hints
S
In order to display “TEMPERATURE ABNORMAL” with no frame, make its
background color the same as that of other screens (“Alarm list”, page 396).
S
So that “TEMPERATURE ABNORMAL” is displayed regardless of which screen
is currently displayed, display the overlapping screens created in (4) at the PT
(“Overlapping Screens”, page 248).
S
As an alternative to making every screen an overlapping screen, the same result
can be achieved by registering an alarm list on every screen.
Example: Displaying a screen with “TEMPERATURE ABNORMAL” in black on a red back-
ground when the monitored PC bit comes ON.
1
ON
TEMPERATURE
ABNORMAL
Screen switched
Bit
PC NT631/NT631C
(1) Set the properties of the screen displayed when the bit comes ON as follows.
- “Background” color: Red
(2) Register a fixed display text element for the screen set in (1) as follows.
- Text: TEMPERATURE ABNORMAL
- “Foreground” color: Black
- “Background” color: Transparent