7 PUMP AND FAN CONTROL APPLICATION
7.1 INTRODUCTION
Select the Pump and Fan Control Application in menu M6 on page S6.2.
The Pump and Fan Control Application can be used to control one variable speed drive and
up to four auxiliary drives. The PID controller of the AC drive controls the speed of the
variable speed drive and gives control signals to start and stop the auxiliary drives to control
the total flow. In addition to the eight parameter groups provided as standard, a parameter
group for multi-pump and fan control functions is available.
The application has two control places on the I/O terminal. Place A is the pump and fan
control and place B is the direct frequency reference. The control place is selected with input
DIN6.
As already its name tells, the Pump and Fan Control Application is used to control the
operation of pumps and fans. It can be used, for example, to decrease the delivery pressure
in booster stations if the measured input pressure falls below a limit specified by the user.
The application utilizes external contactors for switching between the motors connected to
the AC drive. The autochange feature provides the capability of changing the starting order of
the auxiliary drives. Autochange between 2 drives (main drive + 1 auxiliary drive) is set as
default, see Chapter 8.11 Automatic changing between drives (application 7 only).
•
All inputs and outputs are freely programmable.
Additional functions:
•
Analogue input signal range selection
•
Two frequency limit supervisions
•
Torque limit supervision
•
Reference limit supervision
•
Second ramps and S-shape ramp programming
•
Programmable Start/Stop and Reverse logic
•
DC-brake at start and stop
•
Three prohibit frequency areas
•
Programmable U/f curve and switching frequency
•
Autorestart
•
Motor thermal and stall protection: fully programmable; off, warning, fault
•
Motor underload protection
•
Input and output phase supervision
•
Sleep function
The parameters of the Pump and Fan Control Application are explained in Chapter 8
Parameter descriptions of this manual. The explanations are arranged according to the
individual ID number of the parameter.
VACON · 196 PUMP AND FAN CONTROL APPLICATION
7
TEL. +358 (0)201 2121 · FAX +358 (0)201 212 205
To Next Page
Loading...
Need help?
General
