IEC 61131-3 C Tools User Manual

C Program Development

A checksum is calculated for the complete C program. The checksum is verified each time the program is run. This prevents a damaged program from running.

Executing Programs

C application programs are executed when a run program command is received from the IEC 61131-3 C Program Loader; or power is applied to the controller

(except when a SERVICE boot is performed).

To start a program from the program loader:



Run the IEC 61131-3 program.



From the C Program Loader dialog, click on the Run button to execute the program.

The controller will execute either the program in RAM or the program in ROM. It chooses the program to execute in the following order:



C application program in RAM;



C application program in ROM;

 no C application (standard start-up sequence for other components).

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