Rievtech PR-12 Series, User Manual And Programmers Manual

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5.5.8 How to display errors in LAD in the program editor
Red words display errors.
Attention: when you replace the invalid value or symbol with a valid value, the font is
automatically changed to the default font color.
5.5.9 How to compile in LAD
You can use the toolbar button or the “ PLC ” menu to compile.
"Compile" Allows you to compile a single element of the project.When you select
"compile", the current window is compiled and the other windows are not compiled.
"All compile" Compiles the program editor, system block, and data block.When
you use the "All compile" command, all windows are compiled.
Use the output window to resolve the error
When you compile a program, the output window lists all the errors about the
program.Errors include location (network, row and column)and error types.