Design and function
© Festo Didactic • MPS
®
PA Compact Workstation
31
In a piping system or a filter unit the flow velocity of a fluid shall be regulated.
The system used is a controlled system with self-regulation (P-controlled system). It
does not have a time delay. The control loop in combination with the pump (PT1
behaviour) creates a easily controllable system.
2
1
Controlled flow rate system – pump P101 with flow sensor B102 (measuring point ‘FIC B101’)
The pump delivers a fluid from the reservoir via a piping system. The flow rate is
detected by means of an optoelectronic vane sensor B102 (2) in the form of an
actual value. The actual value should be kept on a certain flow rate also if
disturbances or set point changes occur.
For controlling system a continuous element can be used (see also EMCS block
diagrams). There are two operation modes:
•
flow rate control by the means of the pump P101 as controlled system.
Manipulated value is the voltage of the pump, which sets the revolution speed.
•
flow rate control by the means of the proportional valve V106 as controlled
system. Manipulated value is the voltage of the valve coil, which sets the stroke
of the valve piston. The pump P101 is running with a constant revolution speed.
For disturbance is it possible to partly or totally open/close the hand valve V104.
4.7
Flow rate control function
Summary of Contents for MPS PA Compact
Page 1: ...MPS PA Compact Workstation EN 12 08 Process automation MPS PA Compact Workstation Manual ...
Page 10: ...Introduction 10 Festo Didactic MPS PA Compact Workstation ...
Page 14: ...Technical data 14 Festo Didactic MPS PA Compact Workstation ...
Page 16: ...Transport Unpacking Scope of delivery 16 Festo Didactic MPS PA Compact Workstation ...
Page 68: ...Commissioning 68 Festo Didactic MPS PA Compact Workstation ...
Page 70: ...Maintenance 70 Festo Didactic MPS PA Compact Workstation ...