User Manual of EM760 High-Performance Inverter 1.2 Detailed Introduction to Running Status of EM760 series Inverter 1.2.1 Working status of inverter The working status of EM760 series inverter is divided into: parameter setting status, normal running status, jog running status, self-learning running status, stop status, jog stop status and protection status. ● Parameter setting status: After being powered on and initialized, the inverter will be in the standby status with no trip protection or start command, and have no output. ● Normal running status:
Upon receiving a valid start command (from the keyboard, control terminal and communication), the inverter will have the output based on the set input requirements, driving the motor to rotate. ● Jog running status: This is enabled by the keyboard, external terminal or communication, driving the motor to rotate at the jog input speed. ● Self-learning running status: This is enabled by the keyboard, detecting relevant parameters ofthe motor in the stationary or rotating status. ● Stop status: It is a process for the output frequency to decrease to zero according to the set deceleration time in the case of invalid operating commands. ● Jog stop status:
It is a process for the output frequency to decrease to zero according to the jog deceleration time in the case of invalid jog operating commands. ● Protection status: Refer to the inverter status in the case of any protection. 1.2.2 Running mode of inverter The running mode of the inverter refers to the control law of the inverter to drive the motor to rotate at the required speed and torque. The running mode includes: ● General open-loop space vector control - VVF control: suitable for applications where the speed is not changing fast and there are not high requirements for the accuracy of rotating speed, and most AC motor drives. ● Speed sensorless vector control-SVC control:
advanced speed estimation algorithm, involving open-loop vector control and high control accuracy but no encoder. 17