Chroma 61603 - Programming Interface Conventions; Programming Conventions and Syntax

Remote Operation
7-3
7.3 Introduction to Programming
All commands and response messages are transferred in form of ASCII codes. The
response messages must be read completely before a new command is sent, otherwise the
remaining response messages will be lost, and a query interrupt error will occur.
7.3.1 Conventions
Angle brackets
< >
Items in angle brackets are parameter abbreviations.
Vertical bar
|
Vertical bar separates alternative parameters.
Square brackets
[ ]
Items in square brackets are optional. For example, OUTP [ :
STATe] means that : STATe may be omitted.
Braces
{ }
Braces indicate the parameters that may be repeated. The
notation <A> {<, B>} means that parameter “A” must be
entered while parameter “B” may be omitted or entered once or
more times.
7.3.2 Numerical Data Formats
All data programmed to or returned from the AC source are ASCII. The data can be
numerical or character string.
Numerical Data Formats
Symbol
Description
Example
NR1
It is a digit with no decimal point. The decimal is assumed
to be at the right of the least significant digit.
123, 0123
NR2
It is a digit with a decimal point.
12.3, .123
NR3
It is a digit with a decimal point and an exponent.
1.23E+2
7.3.3 Boolean Data Format
The Boolean parameter <Boolean> takes only the form ON|OFF.
7.3.4 Character Data Format
The character strings returned by query command may take either of the following forms:
<CRD> Character Response Data: character string with maximum length of 12.
<SRD> String Response Data: character string.