Vacon NX Series Applications Manual
Also see for NX series: User manualUser manualApplications manualMaintenance manualOperating guide
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Contents
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7 PUMP AND FAN CONTROL APPLICATION7.1 INTRODUCTIONSelect 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 andup to four auxiliary drives. The PID controller of the AC drive controls the speed of thevariable speed drive and gives control signals to start and stop the auxiliary drives to controlthe total flow. In addition to the eight parameter groups provided as standard, a parametergroup 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 fancontrol and place B is the direct frequency reference. The control place is selected with inputDIN6.As already its name tells, the Pump and Fan Control Application is used to control theoperation of pumps and fans. It can be used, for example, to decrease the delivery pressurein 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 tothe AC drive. The autochange feature provides the capability of changing the starting order ofthe auxiliary drives. Autochange between 2 drives (main drive + 1 auxiliary drive) is set asdefault, see Chapter 9.11 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 functionThe parameters of the Pump and Fan Control Application are explained in Chapter 9Parameter descriptions of this manual. The explanations are arranged according to theindividual ID number of the parameter.PUMP AND FAN CONTROL APPLICATION VACON · 167LOCAL CONTACTS: HTTP://DRIVES.DANFOSS.COM/DANFOSS-DRIVES/LOCAL-CONTACTS/ 7 |
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