User`s manual

Local Logic Language Syntax

GFK-1742A Chapter 12 Local Logic Language Syntax 12-5

In the above code segment, the end comment structure, line shown in bold/italic for illustrative

purpose, is incorrect because the asterisk in the close comment structure is absent. The error causes

the following line to be considered a comment as well. Thus, the statement Digital_Output_1:=0 is

considered a comment and not executed. The color scheme within the Local Logic editor can be

very useful to help find these types of problems. The coloring scheme by default will color the

comments a different color than the programming statements. Thus, the user will have a visual

method to help find these errors. Please consult chapter 2 for information on how to change the

default color scheme for the editor.

PRAGMA Directive

The #pragma directive is used to configure the Local Logic parser. The directive is NOT required

for the parser to operate. However, if the user wishes to turn off warning messages the #pragma

directive allows this to occur. The #pragma directive MUST be the first line of the program.

Additionally, no white space should be present prior to the directive.

To turn ALL Local Logic warnings off, issue the following command:

#pragma errorsonly 1

#pragma errorsonly ON

To turn warning messages back ON either delete the directive or change the directive as follows:

#pragma errorsonly 0

#pragma errorsonly OFF

Local Logic Keywords and Operators

The following keywords and operators have special significance in the Local Logic programming

language. Keywords are case-sensitive and use only upper-case letters. These are discussed in

further detail in the following sections.

Table 12-2. Local Logic Keywords

ABS TRUE + >

BWAND FALSE - <

BWOR IF / >=

BWXOR THEN * <=

BWNOT END_IF 16# =

ON MOD 2# <>

OFF ; :=