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- Keithley Applications
- Posts: 2849
- Joined: June 10th, 2010, 6:22 am
- Country: United States
The Model 2400 has two GPIB modes.
IEEE-488.1 and SCPI
I would recommend you use SCPI.
IEEE-488.1 - This mode allows the unit to be faster. But has the following stipulations.
• If a query is sent, it must be the only command on the line (this limitation also
means no multiple queries can be sent). Otherwise, full SCPI command syntax is
still supported including long-form and short form commands, multiple commands,
and MIN/MAX/DEF parameter definitions.
For example, the following command strings are invalid:
The following command strings are valid:
:SOUR1:VOLTage:STARt 1;STOP 10;step 1
:volt:nplc 1.0;:curr:rang min
• When a query is sent, either the data must be read back or a Device Clear (DCL) or
Interface Clear (IFC) must be performed to reset the query.
• When sending a command or query, do not attempt to read data from the
SourceMeter until the terminator has been sent (usually Line Feed with EOI).
Otherwise, a DCL or IFC must be sent to reset the input parser.
• When receiving data, all data, up to and including the terminator (LF with EOI),
must be accepted. Otherwise, a DCL or IFC must be sent to reset the output task.
• Empty command strings (terminator only) should not be sent.
If none of these stipulations are an issue for your application then by all means use IEEE-488.1 mode.
But in general I use the SCPI mode.
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