Memory objects (variables and constants)

Introduction

Converting a PL7 application into a Control Expert application generates certain differences, which are described in the following paragraphs.

Character strings

The converter replaces the %MB and %KB objects with character strings; their position in the memory remains identical.

The name associated with the new character string is:

if no symbol is associated with the object %MB or %KB, MBi_l:
- i = integer,
- l = length of character table,
(example: %MB1000:20 is converted to MB1000_20:STRING[20]).
if a symbol is associated with the object %MB or %KB, symbole_l:
- symbol = symbol of variable,
- l = length of character table,
(example: %MB1000:20 with the symbol TABLE is converted into TABLE_20:STRING[20]).

If there is a comment associated with the first element of a table from %MB or from %KB, the converter declares a character string of length 1 and associates the comment with this (example: TABLE, symbol of %MB500:20 (*This is the TABLE comment*), is converted to TABLE_1:STRING[1](*This is the TABLE comment*)).