Agilent-technologies 34401A Manuel d'utilisateur télécharger pdf (Page 166)

Using Device Clear to Halt Measurements

Device clear is an IEEE-488 low-level bus message which can be used to

halt measurements in progress. Different programming languages and

IEEE-488 interface 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-232 operation, sending the <Ctrl-C> character will perform

the equivalent operations of the

IEEE-488 device 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-232 interface and then set the GPIB address to the

talk only address (31), the multimeter will send readings over the

RS-232 interface when in the local mode.

Chapter 4 Remote Interface Reference

Using Device Clear to Halt Measurements

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Agilent-technologies 34401A Manuel d'utilisateur Page 166