User Manual EM303B General Purpose Inverter 8 Parameter Description Section 1 General Parameters 8.1 F0 Group: General Parameters F0 - 00 and F0 - 01 are optional and for reference only. Their parameters are the setting value of present drive mode. Symbol (-) shall be displayed if the value is negative. When the reference input control mode is different, the data reflected by F0-00/F0-01 is also different. Speed Reference Input Monitoring The unit of F0-00/F0-01 is Hz or rpm which indicates that the present control object is the motor speed, its value is the present setting objective value of speed. When objective value is reverse input, then symbol (-) shall be displayed.
Torque Reference Input Monitoring The unit of F0-00/F0-01 is % which indicates that the present control object is the motor torque. The value is the percentage of present objective torque current to motor rated torque current. If the objective value is negative torque, then symbol (-) shall be displayed. The setting mode of torque reference input is active only in SVC1. F0-02=0 V/F Open Loop Control: Applicable to the occasions when one inverter drives multi-motor, and speed regulation is with low requirements for rapidity and accuracy. ▲ F0-02=2 SVC0 : Vector control mode 0 (without speed feedback). It only estimates real-time speed, but no feedback control.
The whole process of output current is under real-time close-loop control. When motor 0.5 Hz output reaches 150% rated torque, the inverter will automatically search the load variables and limit the output current to make it not exceed the permitted maximum current. Even if load varies suddenly or there is a quick acceleration or deceleration, overcurrent would not occur, so that a general purpose inverter can achieve high performance and reliability. Remarks: This mode is only applicable to speed control mode and not to torque control mode. ▲ F0-02=3 SVC1 : Vector control mode 1 (without speed feedback). It not only estimates speed in real-time, but also controls feedback.
Speed and current are under real-time close-loop control all the time. The speed control and torque control can be achieved at the 81 No. Function Range Unit Default Type F0-00 Speed Reference Input Monitoring Torque Reference Input Monitoring Frequency: 0.00～Fmax/0.0～Fmax Speed: 0～F*Customer defined scaling Torque input: 0.00~Limited torque Hz Rpm % 0.00/0 0.0/0 0.00 X (L) F0-01 (H) No. Function Range Unit Default Type Drive Control Mode 0:V/F open loop control 1:Not used 2: SVC0 3:SVC1 2 〇 F0-02