Auto-Zone Control Systems CommLink IV Technical Guide, Installation Instructions for the CommLink IV Communications Interface (Version 01E) - Manual (Page 18)

CommLink IV Technical Guide
18 Operator Interface
Troubleshooting the COM Port Number
4. To assign a port number less than 10, click on
<Advanced> . The Advanced Settings Window
will appear.
5. In the COM Port Number drop box, select which COM port
you wish to use. Make sure you select a COM port number
that is not currently in use (you can see the ports in use in
the Device Manager Window). Select a port that is less
than 10.
NOTE: Windows ® will assign a port number to every device that
has ever been installed on your computer. So if there are
no available ports below 10, choose a port number less
than 10 for a device listed that you know you are not
currently using.
6. Once you select the correct COM port number, click <OK>
and close any windows opened in the process of changing
the port number. Make note of this number because you will
need it for your Prism setup.
Changing the USB COM Port Number
When the CommLink is fi rst plugged in, it will be assigned a COM port
number to be used for communicating with the Prism software. If the
port number is 10 or greater, it needs to be changed to a value less than
10 to be recognized by Prism.
1. Click <Start> , click <Control Panel> , click
<System> , click the <Hardware> tab, and then click
<Device Manager> to get to the Device
Manager Window.
2. Click on the plus sign next to Ports to see all of the COM
ports.
3. Right-click on “USB Serial Port (COM#)” and select
<Properties> . In the Properties Window, select the
<Port Settings> tab.