Debug method of RS485 wiring

2023-10-10 00:00:00

in access control, parking systems, often for RS485 wiring, always in the process of wiring for debugging, to detect the communication quality.Here we summarized some RS485 debugging methods, hope will be helpful to you.

1. The total debugging method: use 1 line or shielded wire will all 485 devices connect to GND, so that we can avoid the influence of communication between all the devices of electric potential difference.

2. Terminal resistance method: in the last 485 devices on + and 485-485 and 120 ohm resistor to change good communication quality.

3. The middle section disconnect method: by exerting from check whether equipment load, communication distance is too long, and too much impact on the entire communications lines, such as a device.

4. Stay alone method: simple and easy to pull a line alone to the device, it can be used to rule out whether wiring caused the communication failure.

5. Replace the converter method: carry several converters, which eliminates whether converter quality issue impact the communication quality.

6. Notebook debugging method: first to ensure their normal carry computer notebook is communication equipment, use it to replace the client computers for communications, if normal, suggests that the client computer serial port is likely to be damage or injury.

well, debug method on RS485 wiring we introduced this, insufficient place welcome to point out mistakes.