Agilent Technologies 34401A manual Using Device Clear to Halt Measurements, Talk only for Printers

Chapter 4 Remote Interface Reference

Using Device Clear to Halt Measurements

Using Device Clear to Halt Measurements

Device clear is an IEEE-488low-level bus message which can be used to halt measurements in progress. Different programming languages and IEEE-488interface cards provide access to this capability through their own unique commands. The status registers, the error queue, and all configuration states are left unchanged when a device clear message is received. Device clear performs the following actions.

•All measurements in progress are aborted.

•The multimeter returns to the trigger “idle state.”

•The multimeter’s input and output buffers are cleared.

•The multimeter is prepared to accept a new command string.

For RS-232operation, sending the <Ctrl-C> character will perform the equivalent operations of the IEEE-488device clear message.

The multimeter’s DTR (data terminal ready) handshake line will be true following a device clear message. See “DTR/DSR Handshake Protocol,” on page 151 for further details.

TALK ONLY for Printers

You can set the address to “31” which is the talk only mode. In this mode, the multimeter can output readings directly to a printer without being addressed by a bus controller (over either GPIB or RS-232).

For proper operation, make sure your printer is configured in the listen always mode. Address 31 is not a valid address if you are operating the multimeter from the GPIB interface with a bus controller.

If you select the RS-232interface and then set the GPIB address to the talk only address (31), the multimeter will send readings over the RS-232interface when in the local mode.

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