CF 126
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Nov 2001
5.6.1 Determine Address
To determine what address the instrument is using from the front panel:
1) Enter the setup menus by pressing [UP] and [DOWN] together. The display will read “SETUP”
and then “CHANNEL 01 MENU” (which is the top-most item on the setup menus).
2) Press and release [DOWN] until the display reads “SERIAL COM.MENU”. Press [ENTER] to
enter the SERIAL COM. menu.
3) Press and release [DOWN] until the display reads “ADDRESS". Press [ENTER] and the display
will show this DFI’s address, for example “ADDRESS 00”. The address cannot be changed from
the front panel, only from the serial port.
4) Press [EXIT] to exit the menus and restart the instrument.
5.6.2 Change Address
To change the address of a DFI instrument:
1) Establish communication with the instrument, using its present address. For F example, if the
DFI's present address is "00", the command string “#00F0” followed by a carriage return will
cause the instrument to transmit the contents of the display. If the instrument's response appears
garbled, this may be caused by improper wiring or bus termination, having two or more
instruments on the bus with identical addresses, or having the bus master's baud rate not match
that of the instrument. DFI instruments ship from the factory set at 9600 baud.
2) Use the "W4" command to change the DFI's address. For example, if you wish to change the
address of a DFI from "00" to "01 ", send it the command string “00W401” followed by a carriage
return.
Chapter 6 Application Programs
6.1 Introduction
This chapter provides several programming examples and hints for using serial communications with
various applications and programming languages.
Cooper Instruments can also be a source of application information for your specific needs.
Many other programs and languages than the ones listed here allow communication between Cooper
instruments and your computer. Cooper Instruments is not affiliated with any of these companies and
cannot provide technical support for their products.
6.2 HyperTerminal
HyperTerminal is a terminal emulator program that has shipped with Microsoft Windows operating
systems starting with Windows 95. Characters coming in over the port are sent to your screen, and
whatever you type is transmitted out. Although HyperTerminal is generally not useful for data acquisition
or control applications, it can be used to communications verification and experimentation.
6.2.1 Start the Program
If HyperTerminal is installed on your computer, it will be located under either "Start Menu -> Programs ->
Accessories -> Communications -> HyperTerminal" or "Start Menu -> Programs -> Accessories ->
HyperTerminal". If it is not installed, consult your system administrator.
6.2.2 Create a New Connection
If you see a dialog box, which asks:
"You need to install a modem before you can make a connection. Would you like to do this now?"
respond "No".
Create a new connection setup as shown on the screenshot below. Select a descriptive name you will
remember such as "Direct to COM2"
