User`s manual

UPort 2000 Series User’s Manual Driver Installation
To use Normal COM Mode, be sure to the leave Enable Fixed-base COM Mode unchecked. For
the sake of argument, assume that we are using two UPort 2210 USB-to-serial converters
configured for “Normal COM Mode.” Each UPort 2210 has two serial ports. When you plug
UPort D1 (please refer to the figure below) into your computer, your computer’s operating system
assigns the first two available COM numbers (COM3 and COM4 in this example) to the UPort’s
serial ports. If you now plug UPort D2 into another of your computer’s USB ports, your computer
will again assign the first two available COM numbers (COM5 and COM6 in this example). At
this point you can use the UPort utility to assign different COM numbers to these ports.
(D1)
(D2)
COM3-COM4
1
2 COM5-COM6
The UPort’s “Normal COM Mode” has an added twist. Your computer uses the serial number of
each UPort to record which COM numbers are assigned to the UPort’s serial ports. If one or both
of the UPorts are unplugged from the computer, and then plugged back in, the COM numbers of
the UPorts’ serial ports will be the same as they were before the UPorts were unplugged.
For example, if both D1 and D2 are unplugged, and then D2 is plugged back in first, your
computer will assign COM5 and COM6 to D2’s serial ports. When D1 is plugged back in, your
computer will assign COM3 and COM4 to D1’s serial ports.
(D1)
(D2)
COM3-COM4
2
COM5-COM6 1
In “Normal COM Mode” you can reset the COM numbers and configuration parameters of
individual ports to the values needed for your application at any time.
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