When a device (hardware) is installed on a computer, a COM port is automatically
assigned. (COM1, COM2, etc.)
General-purpose package software (application software) uses this COM port
to perform serial communication.
1. Start the Device
Manager.
2. Confirm if the recognized USB device is displayed in the [Universal
Serial Bus controller] folder.
3. Confirm if the added COM port is displayed in the [Ports (COM & LPT)] folder.
Depending on the environment, COM ports
may not be assigned sequentially starting from CH1 on the device.
Therefore, check which CH number on the device corresponds to which COM
port, and then specify the COM port on the general-purpose package software.
You can also change the COM port number from Device Manager.
1. Display the properties of the device you want to change in the [Ports (COM & LPT)] folder.
2. Select the [Port Settings] tab in the properties window and click the [Advanced...] button.
Ex) Connected with COM-4CX-USB
3. You can change the COM port number in the [COM Port Number] combo box in the [Advanced Settings for COM] window.
Ex) Connected with COM-1(USB)H
