Changing The Gpib Address; Sending A Remote Command; Getting Data From The Multimeter - Agilent Technologies 3458A Repair Manual

Changing the GPIB
Every device on the GPIB bus must have a unique address. If you need to
change the multimeter's address, access the ADDRESS command from the
Address
command menu (MENU keys), with the display showing:
You can enter the new address. For example.
Press:
1 Enter
5
You have now changed the address to 15. If you want to change the address
back to 22, repeat the above procedure (or use the Recall key) and specify
22 instead of 15.
Sending a Remote
To send the multimeter a remote command, combine the computer's output
statement with the GPIB select code, the device address, and finally, the
Command
multimeter command. For example, to make the multimeter beep, send:
OUTPUT 722; "BEEP"
Notice the display's REM and LSTN annunciators are illuminated. This
means the multimeter is in the remote mode and has been addressed to listen
(receive a command).
Getting Data from the
The multimeter is capable of outputting readings and responses to query
commands. As an example, have the multimeter generate a response to a
Multimeter
query command by sending:
OUTPUT 722;"ID?"
When you send a query from remote, the multimeter does not display the
response as it did when you executed the command from its front panel.
Instead, the multimeter sends the response to its output buffer. The output
buffer is a register that holds a query response or a single reading until it is
read by the computer or replaced by new information. Use the computer's
input statement to get the response from the output buffer. For example, the
following program reads the response (3458A) and prints it.
10 ENTER 722;A$
20 PRINT A$
30 END
The same technique allows you to get readings from the multimeter.
Whenever the multimeter is making measurements and you have not enabled
reading memory (reading memory is discussed in Chapter 4), you can get a
reading by running the following program.
10 ENTER 722;A
20 PRINT A
30 END
28 Chapter 2 Operating Information