PCFL Operations
(Original Document)
Function Description
The PCFL function blocks give you access to a library of process control functions utilizing analog values.
PCFL operations fall into 3 major categories:
Advanced Calculations
Advanced calculations are used for general mathematical purposes and are not limited to process control applications. With advanced calculations, you can create custom signal processing algorithms, derive states of the controlled process, derive statistical measures of the process, etc.
Simple math routines have already been offered with the EMTH function blocks.
Signal Processing
Signal processing functions are used to manipulate process and derived process signals. They can carry out these functions in a variety of ways; they linearize, filter, delay, and otherwise modify a signal. This category would include functions such as an Analog Input/Output, Limiters, Lead/Lag, and Ramp generators.
Regulatory Control
Regulatory functions perform four-station ratio controller and totalizer for metering flow.