Elevator with Plc program

Information on Drawing Numbers for Elevator PLC Program :
(1). Push Button Switch ( Push Button Switch with Light ) In Floor B Outside.

(2). Light Push Button Switch ( Push Button Switch with Light ) In Floor B Outside.

(3). Push Button Switch ( Push Button Switch with Light ) In Floor 1 Outside.

(4). Light Push Button Switch ( Push Button Switch with Light ) In Floor 1 Outside.

(5). Push Button Switch ( Push Button Switch with Light ) In B Inside.

(6). Light Push Button Switch ( Push Button Switch with Light ) In B Inside.

(7). Push Button Switch ( Push Button Switch with Light ) In 1 Inside.

(8). Light Push Button Switch ( Push Button Switch with Light ) In 1 Inside.

(9). Limit Switch for Position 1
(10). Limit Switch for Position B
(11). Limit Switch for Door Open
(12). Limit Switch for Door Close
(13). Safety Sensor


Number Of Inputs and Output PLC applied :
1. Number Of Inputs PLC is 9 Input :
--- 1 Unit Input for Push Button Switch In Floor B Outside.
--- 1 Unit Input for Push Button Switch In Floor B Inside.
--- 1 Unit Input for Push Button Switch In Floor 1 Outside.
--- 1 Unit Input for Push Button Switch In Floor 1 Inside.
--- 1 Unit Input for Limit Switch Position 1.
--- 1 Unit Input for Limit Switch Position B.
--- 1 Unit Input for Limit Switch Door Open.
--- 1 Unit Input for Limit Switch Door Close.
--- 1 Unit Input for Safety Sensor.
--- Total Number Of Inputs PLC is Minimum 9 Input Unit.


2. Number Of Output PLC is 8 Output :
--- 1 Unit Output for Electric Motors ( Move To Position B )
--- 1 Unit Output for Electric Motors ( Move To Position 1 )
--- 1 Unit Output for Move the Door Open
--- 1 Unit Output for Move the Door Close
--- 1 Unit Output for Light Push Button Switch in B Inside
--- 1 Unit Output for Light Push Button Switch in 1 Inside
--- 1 Unit Output for Light Push Button Switch in B Outside
--- 1 Unit Output for Light Push Button Switch in 1 Outside
--- Total Number Of Outputs PLC is Minimum 8 Output Unit.

Step 1 : Elevator Up - Down ( 1 - B ) 
a. If Push Button B Outside = ON And the elevator was not in a position B Then elevator Move to B.
b. If Push Button B Inside = ON And the elevator was not in a position B Then elevator Move to B.
c. If Push Button 1 Outside = ON And the elevator was not in a position 1 Then elevator Move to 1.
d. If Push Button 1 Inside = ON And the elevator was not in a position 1 Then elevator Move to 1.


Step 2 : Door Open - Close
a. IF Limit Switch Position B = ON (Pulse / diff.Up) Or Limit Switch Position 1 = ON (Pulse / diff.Up) then Door Open.
b. IF Limit Switch Door Open = ON Or Safety Sensor = ON then Door Close.
c. Continuously to Step 1 

Referensi :http://program-plc.blogspot.com