User manual HONEYWELL NXL

[. . . ] Multi-Control Application for NXL Page 1 1 Multi-Control Application (Software ALFIFF20) Ver. INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 2. CONTROL I/O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 3. MULTI-CONTROL APPLICATION ­ PARAMETER LISTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3. 1 Monitoring values (Control keypad: menu M1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] This default setting should be used if there is no special need for another setting. Squared: The voltage of the motor changes following a squared curve form 1 with the frequency in the area from 0 Hz to the field weakening point where the nominal voltage is also supplied to the motor. The motor runs under magnetised below the field weakening point and produces less torque and electromechanical noise. Squared U/f ratio can be used in applications where torque demand of the load is proportional to the square of the speed, e. g in centrifugal fans and pumps. U[V] Un Nominal par. 2. 6. 5 Default: of the motor voltage Field weakening point Linear Squared Default: Nominal frequency of the motor f[Hz] par. 2. 6. 3 NX12K07 Figure 1- 16. Linear and squared change of motor voltage Multi-Control Application Page 35 1 Programmable U/f curve: 2 The U/f curve can be programmed with three different points. Programmable U/f curve can be used if the other settings do not satisfy the needs of the application. U[V ] Un P a r 2 . 6 . 4 Default: Nominal voltage of the motor Field weakening point P a r. 5 H z ) Default: Nominal frequency of the motor f[Hz] P a r. Programmable U/f curve Linear with flux optimisation: 3 The frequency converter starts to search for the minimum motor current and in order to save energy, lower the disturbance level and the noise. Can be used in applications with constant motor load, such as fans, pumps etc. 2. 6. 3 Field weakening point The field weakening point is the output frequency at which the output voltage reaches the set maximum value. 2. 6. 4 Voltage at field weakening point Above the frequency at the field weakening point, the output voltage remains at the set maximum value. Below the frequency at the field weakening point, the output voltage depends on the setting of the U/f curve parameters. See parameters 2. 1. 13, 2. 6. 2, 2. 6. 5 2. 6. 6 and 2. 6. 7 and Figure 1- 17. When the parameters 2. 1. 6 and 2. 1. 7 (nominal voltage and nominal frequency of the motor) are set, the parameters 2. 6. 3 and 2. 6. 4 are automatically given the corresponding values. If you need different values for the field weakening point and the maximum output voltage, change these parameters after setting the parameters 2. 1. 6 and 2. 1. 7. 2. 6. 5 U/f curve, middle point frequency If the programmable U/f curve has been selected with parameter 2. 6. 2 this parameter defines the middle point frequency of the curve. See Figure 1- 17. 1 Page 36 2. 6. 6 Multi-Control Application U/f curve, middle point voltage If the programmable U/f curve has been selected with the parameter 2. 6. 2 this parameter defines the middle point voltage of the curve. See Figure 1- 17. 2. 6. 7 Output voltage at zero frequency This parameter defines the zero frequency voltage of the curve. See Figure 1- 17. 2. 6. 8 Switching frequency Motor noise can be minimised using a high switching frequency. Increasing the switching frequency reduces the capacity of the frequency converter unit. Switching frequency for NXL: 1. . . 16 kHz 2. 6. 9 2. 6. 10 Overvoltage controller Undervoltage controller These parameters allow the under-/overvoltage controllers to be switched out of operation. This may be useful, for example, if the mains supply voltage varies more than ­15% to +10% and the application will not tolerate this over-/undervoltage. [. . . ] 2. 10. 6 = 1 Max. number of auxiliary drives Autochange moment · Par. 2. 10. 7 Autochange level, frequency Time Par. drive 2 control NXLK56. fh8 Figure 1- 37. Autochange interval and limits 2. 10. 8 Start frequency, auxiliary drive 1 The frequency of the drive controlled by the frequency converter must exceed the limit defined with these parameters with 1 Hz before the auxiliary drive is started. [. . . ]