1. Fault code analysis method If the ABB frequency converter has a fault, there are corresponding fault codes on the operation panel. Generally, when dealing with frequency converter faults, it is necessary to find its fault code on the operation panel and conduct a deeper analysis based on the fault code. Based on my personal experience in frequency converter maintenance and some common fault codes, I will briefly discuss some common fault handling methods. 1.1 Fault code: BRAKEFLT Reason for malfunction: Brake failure, brake opening timeout or brake not opening properly. Solution: Open the cover of the brake on site, forcefully open the brake coils in the program, observe the limit opening status of the brake, and if the brake cannot be opened or the mechanism is stuck, replace the brake; If the distance between the limit opening and the limit sensing piece is far...
(1) Fault 1: Touch deviation Phenomenon 1: The position touched by the finger does not coincide with the mouse arrow. Reason 1: After installing the driver program, there was no vertical touch on the center position of the bullseye during calibration. Solution 1: Recalibrate the position. Phenomenon 2: Some areas have accurate touch, while others have deviation in touch. Reason 2: The accumulation of a large amount of dust or scale on the surface acoustic wave reflection stripes around the surface acoustic wave touch screen affects the transmission of acoustic signals. Solution 2: Clean the touch screen, paying special attention to cleaning the sound wave reflection stripes on all sides of the touch screen. When cleaning, disconnect the power supply of the touch screen control card. (2) Fault 2: Touch screen does not respond to touch Phenomenon: When touching the scree...
Operation content: Establish communication between the touch screen and PLC to enable the touch screen to read and write PLC data Communication method: Touch screen communicates with PLC through DP Download line: USB/PPI Precautions for operation: Firstly, in STEP 7, perform hardware configuration (without attaching the HMI as a slave to the PROFIBUS bus, as the HMI is a secondary master), set the DP address and baud rate Then, set the connection parameters in the touch screen programming software (note that the connection parameters should be consistent with those in STEP 7) Finally, transfer the touch screen program to the touch screen via a download cable After successful transmission, it indicates that the program has been successfully downloaded to the touch screen ...