Scpi Data Formats - Ametek 801RP Series User And Programming Manual

The basic parts of the above message are:
Message Component
Headers
Header Separator
Data
Data Separator
Message Units
Message Unit Separator
Root Specifier
Query Indicator
Message Terminator
Note: The use of compound messages such as the one shown in Figure 12-2 is not
recommended as they typically exceed the available receive buffer length of the RP Series
interface.
12.4.3. Headers
Headers are instructions recognized by the AC source. Headers (which are sometimes
known as "keywords") may be either in the long form or the short form.
Long Form
Short Form
The SCPI interface is not sensitive to case. It will recognize any case mixture, such as
VOLTAGE, VOLTage,Voltage. Short form headers result in faster program execution.
In view of the 21 character receive buffer size of the RP Series, the short form is
recommended under all circumstances.
Header Convention
In the command descriptions in chapter Error! Reference source not found. of this manual,
headers are emphasized with boldface type. The proper short form is shown in upper-case
letters, such as DELay.
Header Separator
If a command has more than one header, you must separate them with a colon
(SYSTem:ERRor LIMit:FREQuency:LOW).
Optional Headers
The use of some headers is optional. Optional headers are shown in brackets, such as
VOLTage[:LEVel] 100.
12.4.4. Query Indicator
Following a header with a question mark turns it into a query (VOLTage?, VRANGe?).
RP Series
Example
SOURC VOLT FREQ CURR
The colon in SOUR:VOLT
80
The space in VOLT 80 and FREQ 60
VOLT 80
The semicolons in VOLT 80; and FREQ 60;
The colon in :CURR?
The question mark in CURR?
The <NL> (newline) indicator. Terminators are not part of
the SCPI syntax
The header is completely spelled out, such as VOLTAGE, SYSTEM, and
OUTPUT.
The header has only the first three or four letters, such as VOLT, SYST, and
OUTP.
March 2011
60
FREQ 60 CURR?
47