User`s manual

UPort 1200/1400/1600 Series User’s Manual Driver Installation
If both UPorts are unplugged from the computer, and then UPort D2 is plugged back in, the
computer will now assign COM10 and COM11 to the UPort’s serial ports. When UPort D1 is
plugged back in, COM numbers COM12 and COM13 will be assigned the UPort’s serial ports.
UPort D1
UPort D2
COM12-COM13
COM10-COM11
UPort D2 Plug in first
When “Fixed-base COM Mode” is enabled for the first time, all COM port numbers and
serial port parameters will be reset to their default values. You can then set the COM numbers
and configuration parameters to the values needed for your application.
For example, let’s assume that before you enable “Fixed-base COM Mode” you set the parameters
of the UPort 1250 as follows:
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