Rockwell Automation T80011 Application Note Application Variable Limit Check - Manual (Page 2)

Trusted TM
AN-T80011 Application Variable Limit Check
Issue 1 Dec 07 AN-T80011 2
1. Application Variable Limit Check
1.1. Compiled file appli.h
Compile the application as normal. When compilation is complete, before downloading or updating,
open Windows Explorer and navigate to the Toolset application folder. This will normally be a sub-
folder of c:\Trusted\Toolset\apl. In this folder, find a file called appli.h.
The file size is a reasonable guide to the chances of having a problem. This example is just over 2MB
and its temporary variable numbering is still 39% short of the limit.
Open the file using Notepad or another text
editor. The temporary variables are listed in
categories with their internal tagname and
hexadecimal address. If the address is
greater than hexadecimal FFFF (0XFFFF,
decimal 65,536), it rolls over to zero and will
overwrite other data. The category which is
most likely to roll over is the Booleans,
because these include variables for power
flow debugging.
Request a search for the text ‘FFFF’. In
Notepad, select Edit | Find… and type FFFF
in the ‘Find what:’ window. If an address
0XFFFF is found, then there are too many
temporary variables and other data will be
corrupted.