VXi VT1529A/B 사용자 설명서

Only simple variables can be initialized (not array members) in the 
declaration statement:

static float my_var = 2;

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 190.

To declare global variables, 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.

This section documents the VT1422A's Algorithm Language elements.

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

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

Decimal constants without a decimal point character are treated by the 
translator as 32-bit integer values. See “Data Types” on page 210.

First characters are 0x or 0X. Remaining characters are 0-9 and A-F or 
a-f. No "." allowed.