Omron NT31 Operation Manuals page 623

Examples of Actual Applications of Direct Access
Continuously Reading Out the Contents of a PC Word and Displaying a Trend Graph by Backtracking
Example:
612
Utilizing the trend graph logging function and background function
(1) 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
- Touch switches for logging:
Check marks set for all
- Touch switches for display function:
Check marks set for all
Regardless of whether or not the trend graph is displayed, reading of the con-
tents of the word starts at the same time as PT operation is started.
START
OPERATION
When the trend graph screen is displayed, the latest status is displayed.
Even if another screen is displayed during data collection, the contents of the
word continue being read by the background function.
Data collected while
the other screen was
displayed.
Due to the background function, data reading is started at the
same time as operation is started.
↓
The latest trend graph is displayed on the basis of collected
data.
↓
Other screen
↓
Section 10-1