Failure to load may be due to the following reasons. Please compare the listed items with your operations:
A. Make sure the control system hardware is powered on correctly. (+5V)
B. Check and confirm that the serial port cable used to connect the controller is a straight-through cable, not a crossover cable.
C． Check and confirm that the serial port cable is intact and that both ends are not loose or falling off.
D. Compare the LED display control software and the control card you choose to select the correct product model, the correct transmission method, the correct serial port number, the correct baud rate, and correctly set the control system hardware according to the DIP switch diagram provided in the software. The address bits and baud rate on the.
E. Check whether the jumper cap is loose or fallen off; if the jumper cap is not loose, make sure the jumper cap is in the correct direction.
F． If it still cannot be loaded after the above inspections and corrections, please use a multimeter to measure whether the serial port of the connected computer or control system hardware is damaged. To confirm whether it should be returned to the computer manufacturer or the control system hardware should be returned for testing.