User guide

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Remote Interface Reference
System-Related Commands
4.4.2 Device Clear
The
Device Clear is a low-level IEEE-488 bus message which you can use
to return the instrument to a responsive state if communication appears to
stall. The status registers and the error queue are left unchanged when a
Device Clear message is received. Device Clear performs the following
actions:
The Model 187’s serial and IEEE-488 output buffers are cleared.
The Model 187 is prepared to accept a new command.
Note
For the serial interface, a Device Clear can be initiated by sending
the
<
Ctrl-C
>
(ASCII code 03) character.
4.5 Command Reference
The following paragraphs present all instrument commands and queries
in related groups and a detailed description of the function of each
command or query is provided. Examples are also provided where
appropriate. Return strings may be
up to 80 characters
in length.
4.5.1 System-Related Commands
*IDN?
Return the instrument’s identification string. The identification string
contains the AMI model number and firmware revision code.
*RST
Resets the instrument. This is equivalent to cycling the power to the
instrument using the power switch. All non-volatile calibration data and
battery-backed memory is restored. Status is cleared according to the
*PSC
setting.
*TST?
Performs a self-test. Currently always returns “1” plus a diagnostic code
useful for troubleshooting by an Authorized AMI Technical Support
Representative.
<
Ctrl-C
>
Equivalent to sending a Device Clear message over the IEEE-488
interface.
<
Ctrl-C
>
is only accepted from the serial interface. This clears
the output buffers of the instrument and prepares the instrument for a
new command. Status registers are unaffected.
<
Ctrl-C
>
corresponds to
ASCII code 03.