Measurement-computing DAC488 v.1 Manuel d'utilisateur télécharger pdf (Page 94)

88 DAC488 Commands DAC488 User’s Manual

? - Query

TYPE

System Command (Command Support)

SYNTAX

Returns present configuration or mode of the command preceding the

DESCRIPTION

All DAC488 commands offer a Query (?) option which may be used to determine the present configuration or mode of

a command previously executed. To use this option, the first letter of the command is used, followed by a question

mark (?). Any number of these Query commands may be combined into one string to allow the user to construct a

specialized status command requesting the DAC488 to return only that information which is of interest for a given

application. The Execute (X) command is not needed when using the Query option of a command.

EXAMPLE 1: SRQ Status.

PRINT#1,"CLEAR09"

Line 1: Reset the DAC488.

PRINT#1,"OUTPUT09;M32 X"

Line 2: Select SRQ on error.

PRINT#1,"OUTPUT09;M?"

Line 3: Determine last Mmask command executed.

PRINT#1,"ENTER09"

Line 4: Read data from the DAC488.

INPUT#2,A$

PRINT A$

Line 6: Display shows: M032.

EXAMPLE 2: Port 1 Status Using Status Command (U).

PRINT#1,"OUTPUT09;A0 C0 P1 R3

V8.12345 X"

Line 1: Autoranging off, Direct Control mode, Select port 1, ±10 volt

range, output 8.12345 volts.

PRINT#1,"OUTPUT09;U8 X"

Line 2: Request actual output voltage and range of port 1.

PRINT#1,"ENTER09"

Line 3: Read data from the DAC488.

INPUT#2,A$

PRINT A$

Line 5: Display shows the status message: A0C0P1R3V+08.12250

Note: The programmed voltage was rounded to the nearest value.

EXAMPLE 3: Port 1 Status Using Query Command (?).

PRINT#1,"OUTPUT09;A0 C0 P1 R3

V8.12345 X"

Line 1: Autoranging off, Direct Control mode, Select port 1, ±10 volt

range, output 8.12345 volts.

PRINT#1,"OUTPUT09;A?C?P?R?V?"

Line 2: Request the status of port 1.

PRINT#1,"ENTER09"

Line 3: Read data from the DAC488.

INPUT#2,A$

PRINT A$

Line 5: Display shows the same status message:

A0C0P1R3V+08.12250

1 2 ... 89 90 91 92 93 94 95 96 97 98 99 ... 113 114

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Measurement-computing DAC488 v.1 Manuel d'utilisateur Page 94

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