Vacon NXP Manual

Also see for NXP: User manual User manual User manual User manual Hardware manual

Contents

Vacon NXP Manual Manual pdf 22 page image

22 • vacon Description of parametersTel. +358 (0)201 2121 • Fax +358 (0)201 212 2054. DESCRIPTION OF PARAMETERSOn the following pages you will find the parameter descriptions arranged according to the individual IDnumber of the parameter. A shaded parameter ID number (e.g.418 Motor potentiometer UP) indicatesthat theTTF programming method shall be applied to this parameter (see chapter 6.4. in the ApplicationManual).Some parameter names are followed by a number code indicating the "All in One" applications in which theparameter is included. If no code is shown the parameter is available in all applications. See below. Theparameter numbers under which the parameter appears in different applications are also given.101 Minimum frequency(2.1.1)102 Maximum frequency(2.1.2)Defines the frequency limits of the frequency converter.The maximum value for these parameters is 320 Hz.The software will automatically check the values of parameters ID105, ID106 and ID728.103 Acceleration time 1(2.1.3)104 Deceleration time 1(2.1.4)These limits correspond to the time required for the output frequency to accelerate from thezero frequency to the set maximum frequency (par. ID102).105 Preset speed 1(2.1.15)Parameter values are automatically limited between the minimum and maximum frequencies(par. ID101, ID102).107 Current limit(2.1.5)This parameter determines the maximum motor current from the frequency converter. Theparameter value range differs from size to size. When this parameter is changed the stallcurrent limit (ID710) is internally calculated to 90% of current limit.108 U/f ratio selection(2.6.2)Linear:0The voltage of the motor changes linearly with the frequency in the constantflux area from 0 Hz to the field weakening point where the nominal voltage issupplied to the motor. Linear U/f ration should be used in constant torqueapplications. This default setting should be used if there is no specialneed for another setting.Squared:1The voltage of the motor changes following a squared curve form with thefrequency in the area from 0 Hz to the field weakening point where the nomi-nal voltage is also supplied to the motor. The motor runs undermagnetisedbelow the field weakening point and produces less torque and electro-mechanical noise. Squared U/f ratio can be used in applications where torquedemand of the load is proportional to the square of the speed, e.g. incentrifugal fans and pumps.