Design and function
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PA Compact Workstation
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The process pressure of a fluid inside a pressure tank shall be regulated.
The controlled pressure system used is a controlled system with self-regulation
(PT1-controlled system). Because the pressure tank is partly filled with gas (air) it is
an energy storage system.
2
1
Controlled pressure system – pressure tank B103 with pressure sensor B103 (measuring point ‘PIC B103’)
Via a piping system, the pump P101 delivers a fluid from a resevoir into a gas-
prefilled pressure tank B103 (1). The pressure of the gas (air) in the pressure tank is
detected by means of a piezoresistive relative pressure sensor in the form of an
actual value. The actual value should be kept on a certain pressure also if
disturbances or set point changes occur.
As controlling system a continuous element can be used (see also EMCS block
diagrams). During control a pressure is build up and controlled from liquid to
gaseous medium in the pressure container B103. The amount of liquid inside of the
pressure tank can be increased by opening/closing of the exhaust valve V107 if the
pump P101 is running before using closed-loop control. It is recommended to setup
the water level of the pressure tank at half level with V107 for a opmtimal work
range during closed-loop control.
4.8
Pressure control function
Setup for controlling
Содержание MPS PA Compact
Страница 1: ...MPS PA Compact Workstation EN 12 08 Process automation MPS PA Compact Workstation Manual ...
Страница 10: ...Introduction 10 Festo Didactic MPS PA Compact Workstation ...
Страница 14: ...Technical data 14 Festo Didactic MPS PA Compact Workstation ...
Страница 16: ...Transport Unpacking Scope of delivery 16 Festo Didactic MPS PA Compact Workstation ...
Страница 68: ...Commissioning 68 Festo Didactic MPS PA Compact Workstation ...
Страница 70: ...Maintenance 70 Festo Didactic MPS PA Compact Workstation ...