Control of Forward Rotation Press the button Sb4
Control of Forward Rotation Press the button Sb4, the hand-off KA curl will be turned on, and three contacts of KA that are normally open will be shut, and one typically open contact will be shut, and locking loop KA is power on, one generally open contact will be shut, and button SB1 is shortcircuited, and one more typically open contact is shut, till this second, the STF and SD terminals are associated. The STF terminal receives the forward control signal, and the VFD’s U, V, and W terminals output the forward power supply voltage, causing the motor to move forward. The motor speed will change in accordance with the VFD’s output power when you adjust the potentiometer R connected to the terminal. 2.3 The VFD’s Error Protection The internal equivalent switch that is normally closed between the VFD’s B and C terminals will be disconnected in the event of an error. Additionally, the contactor’s KM coil will lose power and the KM main contact will be disconnected. This will cut off the VFD’s input power and protect it. The relay’s KA coil will also lose power at the same time, and the three normally open KA contacts will be disconnected. 2.4 Stop Control If you press the button Sb3 when the VFD is operating normally, the KA coil will lose power, and the connection between the STF and SI terminals will be cut off. The VFD will also stop supplying power, and the motor will stop working. At the point when the VFD is running, to remove the power supply, it is important to stop the VFD first, and afterward press the button SB1. The contactor’s KM coil loses power at this point, the main contact of KM is disconnected, and the VFD’s input power is cut off. On the off chance that you haven’t made the strides above to stop the VFD, and simply press SB1 straightforwardly, you can’t remove the power supply of the VFD. This is due to the fact that disconnecting SB1 is invalid when the VFD is functioning properly because the normally open contact of KA has short-circuited to SB1. It can thus prevent the SB1 from erroneously operating and shut off the power supply while the VFD is operating.