ELC Programming Manual
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4-4
SFC Structure
1. LAD
- Logic that is needed outside of SFC logic is put here.
- Logic is executed every scan.
- At a minimum logic to enable Initial Step Point must be located here.
2. Initial Step
- The start of the procedure
- Only one per procedure
- Available addresses are S0 – S9
- No transition condition is used between this and the LAD therefore logic must
be included in LAD to turn on Initial Step addresses.
- If more than one procedure is needed, additional Initial Steps can be added.
Place the next Initial Step in first column, but after completion of previous
procedure.
3. Transition
- Condition to move between steps
- Required between each step point
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