Omron NT21 Series, Reference Manual

Page: 402 / 466

5-1 Section Examples of Actual Applications of Direct Access
393
Suggestions
•
In order to display TEMPERATURE ABNORMAL with no frame, make its
background color the same as that of other screens (
Alarm List, page 173).
•
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 36).
•
As an alternative to making every screen an overlapping screen, the same re-
sult can be achieved by registering an alarm list on every screen.
•
The same kind of display can be displayed even though ON/OFF switching
guide characters are set for a normal lamp (N
ormal (Standard) Lamps, page
103).
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 PT
1, 2, 3... 1. Set the properties of the screen displayed when the bit comes ON as fol-
lows.
•
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
3. Make the following settings for any bit memory table.
•
PC Address: Number of the PC bit to be monitored
•
Function: Switch screen
•
Screen No.: Number of the screen set in (1) and (2)
Suggestions
•
In this method, after switching to the error screen, the error screen remains dis-
played even if the status of the monitored PC bit changes back from ON to OFF
(
2-3-3 Bit Memory Tables, page 75). After checking the error at the equipment,
one of the following methods must be used to return to the screen that was dis-
played before the error occurred: using a touch switch with the switch screen
function (page 122), writing a screen number to the control area (page 47), or
switching the screen by using a bit memory table (page 75).
Example:
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