Goodrive300-01A series VFD for air compressor
Common EMC problems and troubleshooting
-178-
If it is confirmed that the abnormality is caused by interference, rule out the problem cause by below
means.
Troubleshooting:
The communication cable cannot be routed with motor cable in the same cable tray.
In multi-machine application, the connection of communication cables between VFDs should
adopt chrysanthemum mode to improve anti-interference ability.
In multi-machine application, it is necessary to confirm that the drive capacity of the master is
strong enough.
For multi-
machine connection, both ends should be connected to 120Ω terminal resistors.
Solutions:
Check and confirm the motor ground line is connected to PE terminal of the VFD (if motor
ground line has been connected to the grounding bar of VFD cabinet, measure with multimeter
to confirm that the resistance between grounding bar and PE terminal is less than 1.5Ω);
The VFD and motor cannot be common grounded along with the communication upper PC
(PLC, HMI, touch screen, etc.). It is recommended to connect the VFD and motor to the power
GND, and connect the communication upper PC to the ground pile separately;
Try to short connect reference GND terminal of VFD signal to the reference GND terminal of
upper PC controller signal to ensure the ground potential of their communication chips is the
same;
Try to short connect reference GND terminal of VFD signal to the grounding terminal (PE) of
the VFD.
E.3 Unstoppable or shimmering indicator caused by coupling of motor cable
Interference phenomena:
Unable to stop
For VFD system whose start/stop is controlled by S terminal, the motor cable and control cable are
routed in the same cable tray. After system starts, it cannot stop by S terminal.
Shimmering indicator
After VFD starts to run, shimmering, flickering or abnormal noise occurred to below equipment:
Relay indicator.
Indicator of distribution box.
PLC indicator.
Indicating buzzer.
Содержание GD300-01A
Страница 1: ......
Страница 187: ...6 6 0 0 1 0 0 7 6 1...
