Feed Forward for Flotation0 pages

Control system
Application

The control system consists of an electrical cubicle with a PLC and an operators panel.
The level sensor delivers the actual tank level
to the PLC via an analogue signal, (4-20mA).
A PID regulator compare the Set-value with the
Actual-value and produces an analogue, (420mA) Reference Output signal to the pneumatic level valve actuator which controls the opening and closing of the Dart valve in the bottom of
the tank.
The Froth Thickness are controlled automatically by means of individual PID regulators with
implementation of the Feed Forward algorithm
for each unit.
The cell bank can be operated from Local or Remote. One control system can control up to 10
levels. In Local mode, the equipment is operated
from the control cubicle preferable located close
to the cell bank.
It is possible to adjust the SET-VALUES for each
unit individually.
In REMOTE mode, the SET-VALUES are adjusted from an external, overriding system. Each
level can also be operated manually from the
operators panel for service and maintenance
purposes.

© Metso Corporation, TS Flotation feed forward 1105-en

The PID- and Feed Forward-parameters can be
adjusted individually from a Tuning menu.

The control cabinet consists of:

• tAutomatic Fuses, (10 & 4A).
• tPower supply for control voltage, 115/230
VAC to 24 VDC
• tInterface for Remote control
• tPLC (Allen Bradley PLC 5/04) for the control
logics
• tAnalogue modules
• tOperators panel Panelview 550 with an illuminated screen for
t – Selection of control mode
t – Selection of unit to control
t – Status information
t – Adjustments and tunings

Stainless steel control cabinet.
For more information, contact your local Metso representative. www.metso.com
Metso Minerals (Sweden) AB, SE-733 25 SALA. Tel: +46 224 570 00.
Specifications in this document are subject to change without notice.
Product names in this publication are all trademarks of Metso Corporation.

Technical specification

Flotation feed forward