Q1002 Strings Not NULL Terminated in the PLC

ArticleID: Q1002
Created: 7/01/1994
Last Updated: 23/11/2007
Suggested By: Martin Roberts

Applies To:

CitectSCADA 1.00, 1.01, 1.10, 1.11, 2.00, 2.01

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Summary:

Strings which are not NULL terminated in the PLC will show extra junk characters when displayed in Citect. Citect uses the NULL character to check for the end of a string, and if no NULL character is present, Citect will read (and display) any junk characters in memory - after the end of the string.

Solution:

All strings must be NULL terminated in the PLC.

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