VXi VT1529A/B 사용자 설명서

The following terms have special meaning when related to the VT1422A.

In general, an algorithm is a tightly defined 
procedure that performs a task. This manual uses 
the term to indicate a program executed within 
the VT1422A that implements a data acquisition 
and control algorithm.

The algorithm programming language specific to 
the VT1422A. This programming language is a 
subset of the ANSI 'C' language.

The program that runs in the VXIbus controller, 
either embedded within the VXIbus mainframe or 
external and interfaced to the mainframe. 
The application program typically sends SCPI 
commands to configure the VT1422A, define its 
algorithms, then start the algorithms running. 
Typically, once the VT1422A is running 
algorithms, the application need only "oversee" 
the control application by monitoring the 
algorithms' status. During algorithm writing, 
debugging and tuning, the application program 
can retrieve comprehensive data from running 
algorithms. 

In this manual, a buffer is an area in RAM 
memory that is allocated to temporarily hold:

Data input values that an algorithm will later 
access. This is the Input Channel Buffer.

Data output values from an algorithm until these 
values are sent to hardware output channels. 
This is the Output Channel Buffer.

Data output values from an algorithm until these 
values are read by the application program. 
This is the First-In-First-Out or FIFO buffer.

A second copy of an array variable containing 
updated values until it is "activated" by an update. 
This is "double buffering."

A second version of a running algorithm until it is 
"activated" by an update. This is only for 
algorithms that are enabled for swapping. This is 
also "double buffering."