HP VXI 75000 C Series, User'S And Scpi Programming Manual

Page: 143 / 438

Algorithm Language Reference 143 Chapter 5
NOTE!
The initialization of the variable only occurs when the algorithm is first
defined with the ALG:DEF command. The first time the algorithm is
executed (module INITed and triggered), the value will be as initialized. But
when the module is stopped (ABORT command), and then re-INITiated, the
variable will not be re-initialized but will contain the value last assigned
during program execution. In order to initialize variables each time the
module is re-INITialized, see “Determining First Execution (First_loop)” on
page 119.
Global Variables
To declare global variables you execute the SCPI command ALG:DEF
'GLOBALS',<program_string>. The <program_string> can contain simple
variable and array variable declaration/initialization statements. The string
must not contain any executable source code.
Language Syntax Summary
This section documents the HP E1415's Algorithm Language elements.
Identifier:
first character is A-Z, a-z, or "_", optionally followed by characters; A-Z,
a-z, 0-9 or "_". Only the first 31 characters are significant. For example;
a, abc, a1, a12, a_12, now_is_the_time, gain1
Decimal Constant:
first character is 0-9 or "."(decimal point). Remaining characters if
present are 0-9, a "."(one only), a single "E"or"e", optional "+" or "-",
0-9. For example; 0.32, 2, 123, 123.456, 1.23456e-2, 12.34E3
NOTE
Decimal constants without a decimal point character are treated by the
translator as 32-bit integer values. See “Data Types” on page 140.
Hexadecimal Constant:
first characters are 0x or 0X. Remaining characters are 0-9 and A-F or
a-f. No "." allowed.
Octal Constant:
first character is 0. Remaining characters are 0-7. If ".", "e", or "E" is