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What caused the RS232 serial port failed to communicate?

时间:2018-08-01 阅读:1804

For controller RS232, the serial port failed to communicate, caused by these:

1. Please check all the hardwares including controlling systems get power correctly and the Power light of the controller is normal;

2. Please check carefully that the serial line connecting with computer and controller is straight lines but not cross lines;
    Please pay more attention, there are many controllers adapt cross lines on the market, but our BX controller is always by straight lines. 
    Please check the wiring diagram of RS232 in the "LedshowTW2012 "software(it is in the set up-set up screen parameters -wiring diagram).

3.  Please check and ensure that the serial port line is stable, without dropping or loosening;

4.  The unqualified USB-RS232 conversion line or use un-normal;
     You need to ensure the driver installed successfully and the installed driver is strictly matched with USB-RS232, when you use USB-232 conversion line. Or the communication blocked. And sometimes loading screen parameters succussed but data sending failed.

5.  The unqualified communicating line, and far distance;
     When the power reached 5V, we adapt high qualified Ann spectrum line for test, and the RS232 serial port communicating distance of BX controller could reach to at least 300M. But on the practice, the communicating distance and stability are always effected by controllers design、communication protocol、the quality of communicating line and the actual working voltage of controller.So, from the above  factors, on the practice, we suggest the distance keeping within 120M.For the special serial port design of BX-4T and BX-5AT/5AO, their serial port communicating distance is shorter.So, we suggest you control in 50M in 57600bit/s baud rate and 100M in 9600bit/s baud rate.

6.  Insufficient power supply of controller, load too much, resulting in the low voltage and caused the communication blocked or unstable;

7.  If the serial port quantity on your computer is more than one, then please select a right port Number which matched with current controller; 

8.  Please do not insert and pull out with power on, as to avoid  the damage of static. (Especially in the dry ,windiness, strong static areas)

 

 

 

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