Omron NT21 Series, Reference Manual

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5-1 Section Examples of Actual Applications of Direct Access
394
Displaying a screen that shows details of the error when the TEMPERATURE
ABNORMAL alarm message is pressed.
192
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C 165
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C 183
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C
TEMPERATURE
ABNORMAL
Alarm list
Error location displayed in red
250
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C 180
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C 175
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C
PT
1, 2, 3...
1. Set TEMPERATURE ABNORMAL as the initial value for any character
string memory table.
2. Make the following settings for any bit memory table.
•
PC Address:
PC bit number to be monitored
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Function:
Alarm
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Switch screen:
Check mark set
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Screen No.:
Number of the screen that displays details of the error (refer to (4))
•
String table entry:
Number of the character string memory table for which settings were
made in (1).
3. Register an alarm list, set as indicated below, for any screen.
•
Color setting, Background, ON:
Red
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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. Register the following elements on the screen that displays the error details.
Numeral displays that display the temperature in each part
Image/library lamp corresponding to each part
(When the bit that indicates the error location comes ON,
the corresponding image/library lamp lights in red.)
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C
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C
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C
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C
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C
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C
Suggestions
•
The ladder program must be written so that at the same time as the bit that indi-
cates the temperature error comes ON, the bit that indicates the error location
for the relevant temperature also comes ON.
Example:
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