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Standard Commands for Programmable Instruments: Difference between revisions

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The only valid commands are the short form and long form of each command, all other subset variations are invalid.
 
:For example, for <code>COMMunicate</code>, only <code>COMM</code> (short form) and <code>COMMUNICATE</code> (long form) are valid, but <code>COM</code>, <code>COMMUN</code>, <code>COMMUNIC</code> subsets are invalid, also appended letters are invalid too, such as <code>COMMUNICATED</code>.
 
=== Concatenating commands ===
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===488.2 commands===
Since SCPI was defined as an additional layer on top of the IEEE 488.2 specification, a SCPI compliant device should recognize various 488.2 commands too.<ref name="SCPI-1999-spec"/> These commands might also be known unofficially as asterisk commands (or star commands), because they all start with the [[asterisk]] <code>*</code> character.
 
According to section 4.1.1 of Volume 1 of SCPI, all SCPI devices need tomust implement the following 488.2 commands.<ref name="SCPI-1999-spec"/> In the real world some low-end devicestest equipment may only support a subset of these 488.2 commands, or may even accept the commands but not perform any operation. A user should check the official programmers manual for each device before assuming all of these 488.2 commands are supported.
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* <code>*CLS</code>
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;Specifications
* [https://www.ivifoundation.org/downloads/SCPI/scpi-99.pdf SCPI-1999, Volume 1-4], 819 page PDF file, '''free''' download ''(doesn't include asterisk (*) commands, because they are specified in IEEE 488.2 & IEC 60488-2)''
* [https://ieeexplore.ieee.org/document/8705775 IEEE 488.2-1992], 254 page PDF file, costs [https://www.techstreet.com/ieee/standards/ieee-488-2-1992?product_id=1888634 USD$5254] in 20242025 ''(superseded by IEEE/IEC 60488-2-2004)''
* [https://ieeexplore.ieee.org/document/1352831 IEEE/IEC 60488-2-2004], 264 page PDF file, costs [https://www.techstreet.com/ieee/standards/ieee-iec-60488-2-2004?product_id=1779348 USD$373388] in 20242025
 
===Programming Manual Examples===
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