From OpenSCADAWiki
Tab "Calculation" of the controller object (Fig. 3) contains parameters and a text of the program, are directly performed by the controller. Also, for monitoring of the execution, the time of calculating of the program is shown. The module provides processing a number of special options available in the controller program:
- f_frq — calculation frequency of the controller program, read-only.
- f_start — first calculation of the controller program — starting, read-only.
- f_stop — last calculation of the controller program — stopping, read-only.
- this — the controller object.