Conditional Pragmas Important You use conditional pragmas in the implementations of ST POUs. CODESYS does not evaluate the conditional pragmas when you use them in the declaration part. The exception

Region Pragma The pragma is used to combine multiple lines in a text editor to a block. The block can be named. Region pragmas can also be nested. Code with region pragma: Expanded and collapsed views

Identifier Designation Rules and recommendations for the identifier designation for variables, constants, functions, function blocks, methods, and other objects :

Rules Rules for variables An identifier must not contain spaces or special characters. The underscore is recognized. For example, A_BCD and AB_CD are treated as two different identifiers. Multiple con

Recommendations :

For variables Whenever possible, you should name variables in Hungarian notation in applications and libraries. Find a meaningful, short, English name for each variable as a base name, which can consi

For Variables in CODESYS V3 Libraries Identifier designation recommendation for Description Example Variable Corresponds to the description for variable names, with the exception that global variables

For Custom Data Types Identifier designation recommendation for Description Example Structures Library prefix followed by an underscore and a short, informative description of the structure The associ

Shortcuts Users can customize the key combinations for their specific needs. The CODESYS Development System provides a series of default key combinations. These key combinations can be changed on the

Error Messages and Warnings :