6RL SERIES OPERATION MANUAL
SECTION 7: REMOTE PROGRAMMING
Entire Contents Copyright
2018 by Adaptive Power Systems, Inc. (APS) • All Rights Reserved • No reproduction without written authorization from APS.
6RL Series Regenerative DC Load Operation Manual
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Format
Description
?
The question mark identifies a message as query. A query can be combined with a control message
(command concatenation). Note that it is required to wait for the response of the query before
the next control message can be sent.
->
Response from unit
Table 7-3: Supported SCPI Command and Parameter formats
Coupled Commands
It is possible to couple, i.e. concatenate up to 5 commands in one message. The commands
must then be separated by a semicolon (;). Example:
VOLT 80;CURR 20;POW 3kW
The command in the string are processed from left to right, so the order of commands is
important to achieve correct results. When querying multiple values or parameters at once,
the returned string is also in coupled format, with the queried returns separated by
semicolons.
Note: Returned messages can be up to 512 characters. When querying coupled commands
where the response would exceed 512 characters, like when querying 5x *IDN?,
nothing is returned.
Long form and short form
SCPI commands have a long and a short form. The short form (e.g. SOUR) and the long form
(e.g. SOURCE) can be used arbitrarily. To distinguish both forms, the commands as described
in the following sections are written partly in upper case (indicates short form), partly in
lower case letters (indicates the optional part of the long form).
Termination Character
Some interfaces like for example GPIB require a termination character at the end of each
message. On other interfaces, termination characters are supported, but optional, in order
to maintain compatibility between several different interfaces in control software using
SCPI. Units with GPIB option installed, a termination character is required or a timeout error
will occur.
Supported termination character(s): 0xA (LF, line feed)
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