RESETTABLE INITIAL SFC STEP FUNCTION (RESET-INIT)

This function can be used to set up an operating phase or step for a PLC or a device by setting the REINITIALISATION input to on. The phase corresponds to the initial state of an independent SFC chart. It can also be used to control the reinitialisation of this independent chart by setting the REINITIALISATION input to ON. This reinitialisation, which has priority over all the input values of an independent SFC chart, forces a status token to its own state and all other functions to their initial states (INIT STEP) in the same chart. It therefore forces the STEP OUTPUT for this function associated with ON and deletes the tokens present in all the other functions and other STEP TRANSITION OUTPUTS in the entire independent SFC chart.

If an independent SFC chart has a RESET-INIT function, it is COMPULSORY:

This function is used to save the current values of the independent SFC chart containing it during a power cut and to restore them when the mains power returns.

When REINITIALISATION is set to OFF the function operates in the same way as a conventional step function, i.e.:

The non-connected inputs are set to neutral values for the function, i.e.:

Warning: There must be no more than one function of this type per independent SFC chart.

Parameterisation box/Comments tab

For more information about SFC charts and this function, see: SFC chart help.

Back to Contents