7.Application Examples
EM8 User's Manual
85
7.7 Inverters constitute a closed-loop control system
7.7.1 Parameter settings
According to the motor rated nameplate data, to set parameter A-5, A-6.
Must set parameters as following:
[A-0] = 2: Parameter A-0 set to 2 to select senior parameters running mode.
[C-48] = 1: Parameter C-48 set to 1, select the built-in PID control.
[C-49] = 0: Setting channel selection, the selection panel potentiometer as PID setting channel.
[C-50] = 3: Feedback channel selection, here select voltage input 2 (V2) is used as the feedback channel,
feedback signal – 10V~ 10V.
[C-54] = 2: Controller structure choice, the choice of PI controller.
[C-55] = 0.5: Proportional gain, according to the need to set.
[C-56] = 10.0: Integral time constant, according to the need to set.
[C-57] = 0.1: Differential gain, here doesn't work.
[C-58] = 0.10: Sampling period, general do not need to change.
7.7.2 Wiring
Frequency inverter constitute a close loop control system show as diagram 7-8:
Diagram 7-8: Frequency inverter constitute a close loop control system
7.8 Use upper computer (PC) control many sets frequency inverters
7.8.1 Parameter settings
According to the motor rated nameplate data, to set parameter A-5, A-6.
Must set parameters as following:
[A-0] = 2: Parameter A-0 set to 2 select senior parameters running mode.
[AS] = 8: Frequency input channel select to combination setting.
[A-3] = 3: The slave inverter running command channel set to RS485 mode (= 3, 4)
[C-79]: Data format, all frequency inverters data format should set to same.
[C-80]: Baud rate, all frequency inverter baud rates shall set to same.
[C-81]: = 0 Inverter set to salve.
[C-83]: Set according to the needs of user
[b-56] = 161: Combination mode selection is the first csecond channel (users can set according
own need). The first channel input format is RS485 interface. The second channel input format is external
voltage signal 1.
Other parameters, users can set according to own need.
7.8.2 Basic wiring diagram
Upper computer (PC) control many sets frequency inverters, basic wiring diagram as shown in diagram
