ChatDiagram
Kostenlos testen
Logic gates · Elevator safety · Fire recall

Elevator fire service recall logic

This elevator fire service recall logic diagram shows a simplified boolean model for returning a car to a selected recall landing. An active fire alarm chooses the main landing unless the alternate recall input is active. Motion outputs require the door to be closed and turn off when the matching position is reached. The final output holds the doors at the selected recall landing.

Typ LogikgatterdiagrammStandard IEEE Std 91/91a-1991Engine schematex-logicAktualisiert 22.9.2026
Elevator Control
Fire service recall logic
Drawing preview
Die Anfrage

“Draw gate-level logic for elevator fire service recall using FIRE_ALARM, alternate recall selection, main and alternate recall positions, and DOOR_CLOSED inputs to produce RECALL_MAIN, RECALL_ALT, and HOLD_DOORS outputs.”

Dann probieren SieAdd a firefighter phase-two input.Add a recall-fault indicator.
Was diese Zeichnung zeigt

Die dahinterstehenden Entscheidungen verstehen.

01

Alternate selection inhibits the main recall request.

02

Motion is only enabled while the door is closed.

03

The selected recall output stays off once that landing is reached.

04

Door hold asserts when the car is at the selected recall landing.

This diagram illustrates boolean relationships only. Fire service operation must be designed and approved to the applicable elevator and fire alarm standards by qualified professionals.

Alle Logikgatterdiagramm-Vorlagen durchsuchen →

FAQ

Häufige Fragen

What is alternate recall?

It is an alternate landing selected when the primary recall floor is unsuitable.

Why require a closed door for recall motion?

The example models a basic interlock so movement is not commanded with an open door.

Can this circuit be used in a real lift?

No. Real fire service controls require certified, code-compliant equipment and design.