GE Baker Hughes Masoneilan SVI FF Installation And Operation Manual page 104

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BHGE
Valve position signal from Transducer block and feedbacks
it to an upstream block.
DI block - Receives the discrete signal from Transducer block
and outputs them.
PID block - Offers PID control function. This is configured by
choosing the algorithm:
Ideal algorithm
Parallel algorithm
Series algorithm
I-PD algorithm
IP-D algorithm
DO block - Takes a binary setpoint and writes it to a specified
I/O channel to produce an output signal. The Discrete Output
function block supports mode control, output tracking, and
simulation.
AR (Arithmetic) block - Contains math functions that are
selected by name.
IS block - Provides selection of up to four inputs and
generates an output based on the configured action. This
block normally receives its inputs from AI blocks. The block
performs maximum, minimum, middle, average and first
good signal selection.
OS (Output Splitter) block - Splits a single control signal into
two parts for coordinating the actions of two or more valves,
such as for split-range control or sequencing control of a
large and a small valve.
AI block - The analog input (AI) block is designed to let users
use standard models of the generalized signal conditioning
function. The AI block receives and processes data measured
by the transducer block as follows:
Scaling
Square-root calculation (for an orifice plate)
Low-pass filter
Alarm generation
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