# The Block Diagram For An Elevator Controller For A Building With Two Floors Is Shown Below. The Inputs FB1 And FB2 Are Floor Buttons In The Elevator. The Inputs CALL1 And CALL2 Are Call Buttons In The Hall. The Inputs FS1 And FS2 Are Floor Switches That Output A 1 When The Elevator Is At The First Or Second Floor Landing. Outputs UP And DOWN Control … Transcribed Text:
Question: The block diagram for an elevator controller for a building with t…
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FB –
Storage Circuit
CALL
FB2 CALL
Storage Circuit
UP Control Circuit | DOWN
N2

DO
Door Mechanism
FS2
The block diagram for an elevator controller for a building with two floors is shown below. The inputs FB1 and FB2 are floor buttons in the elevator. The inputs CALL1 and CALL2 are call buttons in the hall. The inputs FS1 and FS2 are floor switches that output a l when the elevator is at the first or second floor landing. Outputs UP and DOWN control the motor, and the elevator is stopped when UP = DOWN = O. Ni and N2 are flip-flops that indicate when the elevator is needed on the first or second floor. R1 and R2 are signals that reset these flip-flops. DO = 1 causes the door to open, and DC = 1 indicates that the door is closed. Assume that all the input signals are properly synchronized with the system clock. Design the control Circuit and the two storage circuits.
Deliverables: 1. State Diagram 2. State Table and Flip-flop Table 3. Circuit Diagram
Bi po
SM chart is below:
F12
UP
VN
R2, DO
R1, DO
F11
(R2, DO )
(R1, DO
WN
UP
State Table is also there:
ESTRUP
Name Meaning
S. Staying on first floor S. Moving from first to second floor S, Staying on second floor S. Moving from second to first floor
N, ‘N DC
FS2.DO
Nike
N2DO.
N, N, DC
(2) NN, DC
NND LOWN
FS’
DOWN
Flip Flop Table:
N = Q = (Q; + FB: + CALL)R
= QR’ + FBR + CALLR
Call; FB; 2
N;
R; – DOUD
Clock
With the state assignment S=00, S = 01, S, = 10, S. = 11, we have: D. = FS,2,2, + FS, 9, +9.9 D = FS 9,9,+ FS 9,2, +N N.DC99, +NN,DC9,9 R=FS 9,9, +ng:
R = FS 9 9, +N 9,9 UP=FS 9 9, +N’N DC99 DOWN=FS 9,9, +NN DC9,9;
DO=F5 g;9, +F8, 99, +N,99 +N,99
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SM Chart:
F12
CUP
DOWN
FS1
(R2, DO
R1, DO
F221
F11/
R2, DO
R1, DO
DOWN
UP