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6 Remote Operation
6.1 Introduction to SCPI
SCPI is a command structure that is based on the IEEE-488.2 specification
which Dow-key has adapted to work with Ethernet, RS-232 and USB controls.
The matrix has internal software loaded that uses SCPI command structure.
SCPI is the abbreviation of Standard Commands for Programmable
Instruments. These commands are standard messages for the (remote) control
of programmable instruments, which are sent by the Ethernet and/or RS-232
and/or USB controller. The principal objective of SCPI is to make the
programming of a test system easier for the user. When the basic concepts
and command structure of SCPI is understood, it will be easy for the user to
write or modify a control program for the matrix.
The Socket Type of the matrix is server while your remote control computer is
the client.
NOTE: Not all commands for SCPI are compatible with Ethernet, RS-232
and USB, only the ones stated in this document.
6.2 Command Syntax Structure
[ROUTe]:SWITch<id>[:VALue] <number>|MAX
• Square brackets [ ] indicate optional keywords or parameters.
• Braces { } enclosure parameter choices with a command string
• Triangle brackets < > enclose parameters for which you must substitute a
value.
• Vertical bar | separates multiple parameter choices.
The command syntax shows most commands as a mixture of upper and lower
case letters. The upper case letters indicate the abbreviated spelling for the
command. For shorter program lines, the abbreviated form is used. For better
program readability, the long form is used. For example, in the above syntax
statement, ROUT and ROUTE are both acceptable forms. Since both upper
and/or lower case letters are acceptable, ROUTE, rout and Rout are all
acceptable. Other forms, such as RO and ROU are not acceptable and will
generate an error.
NOTE: Each command must be terminated with a carriage return (0×0D)
followed by a line feed (0×0A).
e.g. ”ROUT:SWITx n\r\n”
“ ROUT:SWITx n; SWITx?\r\n”
Where “\r” stands for carriage return (0×0D) and “\n” stands for line feed
(0×0A).
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