Section 5 • Compressor Control Overview; How Compressor Control Setpoint Works - Emerson VILTER MicroVission Operation And Service Manual

Section 5 • Compressor Control
Overview
The Compressor Control screens is where an operator
can set majority of the compressor settings. These set-
tings define how the compressor will operate and re-
spond to changing loads. The compressor control screen
consists of several pages, but in order not to overwhelm
the operator with options, many of the pages may not
be visible.
How the compressor is setup in the configuration screen
will determine what compressor control pages are
displayed.
It is important to note that there isn't one correct way to
set these parameters. Every application is different and
requires the operator to tune these settings to achieve
the best operation.
For Suction Pressure Control, Process Temperature
Control & Discharge Pressure Control operator can use
two different set of values for compressor control. These
values are categorized as Setpoint 1 and Setpoint 2.
Active Control Mode decides which set of values will be
used to control the compressors.
MicroVission Controller • Operation and Service Manual • Emerson • 35391MV 1.3
NOTE

How Compressor Control Setpoint works?

The MicroVission will load and unload reciprocating
compressor cylinders to maintain the control setpoint.
The control setpoint can be either of suction pressure
control setpoint, process temperature control setpoint
or discharge pressure control setpoint depending on
what the operator has selected as the control mode.
The following figure shows how the MicroVission uses
the setpoints and offset values to load / unload compres-
sor in steps after specific time interval.
5 – 1