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The COM port correspondin...

The COM port corresponding to the USB cable of the CT6200 box changes

Created: Aug 13, 2019 09:56:48Latest reply: Mar 13, 2022 15:49:25 828 4 1 0 0
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Hello, everyone!

The terminal box is the CT6200 Linux system. It is configured with the original 1-to-4 serial port cable. The VM operating system is win7 64 bits. The onsite environment requires two serial cable devices and two USB devices. The two USB devices are identified as COM ports in the system.


The problem is that the two USB devices do not change the COM port normally. However, after the TC is restarted or a line is removed and then inserted, the COM port of the USB cable is changed immediately. As a result, the TC program cannot be identified.

Thanks in advance!

CT6200COM
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olive.zhao
Admin Created Aug 13, 2019 10:28:40

Hello, friend!

This is caused by the mechanism of identifying the serial port on the Linux client. The port number of the device may change when the TC is removed or re-inserted or restarted. If the port number changes, the program also needs to be changed. If the specific USB to the TTL module is fixed with the specific port number, each time the USB port is removed and then inserted, the port number will not be changed.

1. You can find a PC or Windows TC test. The Windows identification mechanism does not have this problem. If necessary, you can replace the TC according to the test result.

2. You can also test the setting of the serial port. You can find the solution from the Linux website.

Have a nice day!

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olive.zhao
olive.zhao Admin Created Aug 13, 2019 10:28:40

Hello, friend!

This is caused by the mechanism of identifying the serial port on the Linux client. The port number of the device may change when the TC is removed or re-inserted or restarted. If the port number changes, the program also needs to be changed. If the specific USB to the TTL module is fixed with the specific port number, each time the USB port is removed and then inserted, the port number will not be changed.

1. You can find a PC or Windows TC test. The Windows identification mechanism does not have this problem. If necessary, you can replace the TC according to the test result.

2. You can also test the setting of the serial port. You can find the solution from the Linux website.

Have a nice day!

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jingoba
jingoba Created Aug 14, 2019 06:49:46

Posted by ganmianpi at 2019-08-13 10:28Hello, this is caused by the mechanism of identifying the serial port on the Linux client. The port  ...

Thanks for your feedback!

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Unicef
Unicef MVE Created Mar 13, 2022 13:52:25

GOOD ANSWER
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user_4358465
user_4358465 Created Mar 13, 2022 15:49:25

Informative reply and post! Thank you
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