Vacon NX series, Руководство по применению

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5 PID CONTROL APPLICATION
5.1 INTRODUCTION
Select the PID Control Application in menu M6 on page S6.2
In the PID Control Application, there are two I/O terminal control places; place A is the PID
controller and source B is the direct frequency reference. The control place A or B is
selected with digital input DIN6.
The PID controller reference can be selected from the analogue inputs, fieldbus, motorised
potentiometer, enabling the PID Reference 2 or applying the control keypad reference. The
PID controller actual value can be selected from the analogue inputs, fieldbus, the actual
values of the motor or through the mathematical functions of these.
The direct frequency reference can be used for the control without the PID controller and
selected from the analogue inputs, fieldbus, motor potentiometer or keypad.
The PID Application is typically used to control level measuring or pumps and fans. In these
applications, the PID Application provides a smooth control and an integrated measuring and
controlling package where no additional components are needed.
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Digital inputs DIN2, DIN3, DIN5 and all the outputs are freely programmable.
Additional functions:
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Analogue input signal range selection
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Two frequency limit supervisions
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Torque limit supervision
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Reference limit supervision
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Second ramps and S-shape ramp programming
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Programmable start and stop functions
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DC-brake at start and stop
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Three prohibit frequency areas
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Programmable U/f curve and switching frequency
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Autorestart
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Motor thermal and stall protection: fully programmable; off, warning, fault
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Motor underload protection
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Input and output phase supervision
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Sum point frequency addition to PID output
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The PID controller can additionally be used from control places I/O B, keypad and
fieldbus
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Easy ChangeOver function
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Sleep function
The parameters of the PID 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.
PID CONTROL APPLICATION VACON · 95
24-HOUR S358 (0)201 212 575 · EMAIL: VACON@VACON.COM
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