Moxa UPort 2210 [24/36] Com3 com4

UPort 2000 Series Driver Installation

2-15

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.

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.

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.

COM3-COM4

COM5-COM6

(D1)

(D2)

COM3-COM4

COM5-COM6

(D1)

(D2)