An instance of this Function Block type sequences a set of four boolean outputs in an order determined by the MODE input. Successive steps in the output sequence are triggered by events at the REQ input.
The INIT, COUNT_UP and COUNT_DOWN algorithms are written in the ST (Structured Text) language, and the FLASH_ALL, CHASE_UP and CHASE_DOWN algorithms are written in the LD (Ladder Diagram) language.

Enter data for the MODE input variable.
Exercise the FB by clicking on the event inputs.
Last updated: 2011-03-25.
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Licensed under the Academic Free License version 3.0.