5-1SectionExamples of Actual Applications of Direct Access
407
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 address 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
contents of the word starts at the same time as PT operation is started.
START
OPERATION
Due to the background function, data reading is started at
the same time as operation is started.
↓
When the trend graph screen is displayed, the latest status is displayed.
The latest trend graph is displayed on the basis of collected
data.
↓
Even if another screen is displayed during data collection, the contents of
the word continue being read by the background function.
Other screen
Data collected while
the other screen was
displayed.
↓
Example:
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