Purpose
The Statistical Data (SD) block collects and performs statistical calculations on data.
Features
The Statistical Data block:
- Is a statistical block.
- Can be used as a stand-alone block.
- Can only be followed by a Statistical Control block, if appropriate.
- Receives data from Analog Input, Analog Output, Analog Alarm, and Calculation blocks through the Input field, not from a previous block's Next Block field.
- Supports from 12 to 50 groups and from 1 to 25 observations per group.
- Performs alarming and charting on control and warning limits.
- Provides out of process control alarms.
- Operates in Automatic mode by accepting automatic updates.
- Operates in Manual mode by accepting manual updates from operators or from Easy Database Access programs.
- Can be used in a chain with exception-based processing if you do not enter a time in the Wait Time field.
See Also
Alarming Considerations in the Statistical Data Block
Statistical Data Block – Constants and Formulas for Control Charts
Statistical Data Block – Formulas
Statistical Data Block – Factors for Standard Deviation Control Limits
