Programmable DC Power Supply 62000P Series Operating & Programming Manual
5.3.5 Basic
Definition
5.3.5.1 Command Tree Structure
The commands of the DC Power Supply are based on a hierarchical structure, also known as a
tree system. In order to obtain a particular command, the full path to that command must be
specified. This path is represented in the structure by placing the highest node in the farthest
left position of the hierarchy. Lower nodes in the hierarchy are indented in the position to
the right, below the parent node.
5.3.5.2 Program
Headers
Program headers are key words that identify the command. They follow the syntax
described in subsection 5.6 of IEEE 488.2. The DC Power Supply accepts characters in both
upper and lower case without distinguishing the difference. Program headers consist of two
distinctive types, common command headers and instrument-controlled headers.
5.3.5.3 Common Command and Query Headers
The syntax of common command and query headers is described in IEEE 488.2. It is used
together with the IEEE 488.2-defined common commands and queries. The commands with
a leading “ * ” are common commands.
5.3.5.4 Instrument-Controlled
Headers
Instrument-controlled headers are used for all other instrument commands. Each of them
has a long form and a short form. The AC source only accepts the exact short and long
forms. A special notation will be taken to differentiate the short form header from the long
one of the same header in this subsection. The short form header is shown in characters of
upper case, whereas the rest of the headers are shown in those of lower case.
5.3.5.5 Program
Header Separator (:)
If a command has more than one header, the user must separate them with a colon
(FETC:CURR FUNC:SHAP). Data must be separated from program header by one space at
least.
5.3.5.6 Program
Message
Program message consists of a sequence of zero or other elements of program message unit
that is separated by separator elements of program message unit.
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