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Reasons for the problem of the communication line of the parking lot system:
This problem is a problem that often occurs during the initial installation and use of the system. In the debugging phase, especially when the distance between the devices is long, the situation often occurs. To eliminate this problem, the basic method is:
The first kind: Remove from the 485 card from the control board 485 line, and then short-circuit at the equipment end;
The second kind: Measure with the multimeter at the computer end, judge whether it is pass;
What to do if the parking system is unstable in use?
Instability in communication is one of the most common failures in the use of parking system systems. The use of communication system instability in the parking system system is generally caused by the following reasons:
The communication line is longer or the wiring is not standardized. Ordinary power cables or non-twist shielded cables are used, and the middle connector is not reliably connected. Processing method: replace the communication line, if the site conditions are limited, you can increase the 120Ω termination resistance, or add 485 repeaters.
The RS-485 communication converter has poor load capability. Treatment method: Replace the RS-485 communication converter. If there are many system devices, you can add four RS-485 communication converters.
Computer serial port or RS-485 communication converter is unstable. The processing method is: replace the RS-485 communication converter, install the serial port expansion card or replace the computer, avoid using the USB port 232.
The control board communication circuit is unstable. Treatment method: Check or replace the control board.
To avoid the appearance of appeals, there are a lot of precautions when laying the parking lot system fiber. Here are some points to highlight:
1. The reserved length of the optical fiber should be 2 to 3 meters.
2. The fiber should be protected during the laying process and should not be pinched by heavy objects.
3. The radius of the optical fiber at the turning point of the line is large, and the 90° elbow cannot be used. Usually, the tube well is to be turned.
4. Fibers generally enter at large angles when entering the booth.
The amount of work for the parking lot system needs to be implemented from the very beginning. The following are the details:
1) The longest distance between the entrances and exits of the vehicles (mainly for the separation of the entrances and exits) needs to be implemented in order to determine the number of pipe construction wires.
2) The condition of the road surface between the vehicle entrances and exits needs to be determined to determine the type of road surface (concrete, brick, or turf) for determining the amount of construction work.
3) For entrances and exits at the same intersection, it is necessary to confirm whether or not to construct a safety island for fixed system equipment. In addition, it is necessary to confirm whether the safety island needs to be tiled.
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