Purpose
The Histogram (HS) block records how frequently a value occurs during a specified period.
Features
The Histogram block:
- Is an optional statistical process block.
- Is a secondary block.
- Receives values from an upstream block.
Display Considerations
The Histogram block displays only previously collected values. The Group field determines the number of values the block collects before it displays them. For example, if the upstream block's scan rate is 5 seconds and you specify a Group value of 10, the chart only reflects the values collected during the last 50 seconds.
Meanwhile, the Histogram block is collecting another set of values, which it will display at the end of the next 50-second, scan interval. Note that if the upstream block is taken off scan, the histogram does not register the frequency-of-occurrence data.
