Simplex 4010 Applications Manual page 59

Elevator Recall,
Step 4. Add Custom Control
Equations (continued)
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Continued
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Equation 2. The input side of this equation monitors List L27, which
contains the initiating devices located on the alternate floor. If one of these
devices contained activates, the output side of this equation executes,
energizing the relay and returning the elevator to the alternate floor.
Equation 1
Equation 2
Figure 4-6. Custom Control Equations for Elevator Recall
4-13