4. Sequential Function Charts
MN05003003E For more information visit: www.eaton.com
4-5
4. Common Step Point
- These compose the bulk of the SFC
- Step Points in a procedure other than the Initial Step Point
- Ladder logic is contained within the Step Points.
- Available addresses depend on the processor.
5. Convergence/Divergence
- The ways to transition to and from multi-steps
- Two types of each: Alternative and Simultaneous
- Alternative: Each step has a unique transition condition
- Simultaneous : All steps share one transition condition
1. No divergence:
Move from S0 to S20
according to the transition
condition 0.
2. Alternative Divergence:
This is an OR condition. Move
from S0 to either S20 or S21
by different transition
conditions 0 and 1.
3. Simultaneous Divergence:
This is an AND condition.
Move from S0 to both S20
and S21 by the single
transition condition 0.
Divergence moves from one step to many.
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