Parr Instrument 4857 User Manual
Page 16
4857 Reactor Controllers
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O
PERATION OF THE
4857
P
ROCESS
C
ONTROLLER
(
CONTINUED
)
Finding the Active COM Port
When using CalGrafix to connect to the 4857 Process Controller, it is advantageous to know
which COM port the PC is using to connect to the controller. The following instructions detail
how to find the active COM port with Windows 2000 as the operating system.
1. Connect the 4857 to the PC using the provided cable and turn the 4857 on.
2. On the Desktop, right click on "My Computer" and select "Properties."
3. Switch to the "Hardware" tab and click on "Device Manager."
4. The Device Manager should come up. Expand the "Ports (COM & LPT)" box.
5. The COM ports which are in use should be listed here. Make a note of the ones listed; one
of these should be the one to instruct CalGrafix to use to connect to the 4857.
Setting the Active COM Port
In some instances (such as restoring Factory Defaults) it is necessary to instruct the PC which
COM port to use for connection to the 4857. You will need Administrator privileges in order to
set the active COM port.
1. Connect the 4857 to the PC using the provided cable and turn the 4857 on.
2. On the Desktop, right click on "My Computer" and select "Properties."
3. Switch to the "Hardware" tab and click on "Device Manager."
4. The Device Manager should come up. Expand the "Ports (COM & LPT)" box.
5. Right click on the active COM port and select "Properties." Tab to "Port Settings" and click
on "Advanced."
6. Set the COM port using the "COM port number" box. Click OK and exit the device manager.