c # serial port problem, 12 usb serial port, six of them is to scan gun, 6 is the infrared serial port, bulk port puzzling change in use process, no plug a serial port,

CodePudding user response:

This will not change ah, which the mouth is which, you this multi-serial port should be the main PIC extended out, check the PIC card slot if you have any questions

CodePudding user response:

USB extension is not stable, directly inserted PCIE expand,

CodePudding user response:

Com is the problem, you see if poor contact, via parallel?

CodePudding user response:

USB extension is not stable,,,

CodePudding user response:

Solution to the upper machine:
Equipment connection device type test first, then process the data.

CodePudding user response:

Try change the serial port

CodePudding user response:

There is no plug, should be caused by poor contact

CodePudding user response:

Heard that want to use serial number 10 within priority, you can manually change the serial number

CodePudding user response:

You this is a serial port driver board,

CodePudding user response:

USB serial port plug the serial number is likely to change,
The USB serial number is not fixed under Windows
Often use the USB serial port will find USB serial number will change, need to go in the device manager looking for USB serial number into what

CodePudding user response:

Hardware problems, can not rely on software to solve, try replacing hardware, industrial computer, before I use research China after they come over and solve

CodePudding user response:

In other ways, such as adding a gateway between the computer serial port - & gt; Gateway serial port 0 & lt; -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- & gt; Gateway serial port 1 -- -- -- -- -- -- -- -- -- -- & gt; Device 1
<-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- & gt; Gateway serial port 2 -- -- -- -- -- -- -- -- -- -- & gt; Equipment 2
<-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- & gt; Gateway serial port 3 -- -- -- -- -- -- -- -- -- -- & gt; Equipment 3
<-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- & gt; Gateway serial port 4 -- -- -- -- -- -- -- -- -- -- & gt; Equipment 4
,,,,,,,,
<-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- & gt; Gateway serial n -- -- -- -- -- -- -- -- -- -- & gt; Equipment n