When timer done turned on, close door motor should ON until closed limit switch is turned ON.

When the open door limit switch is turned to on, the Open motor door should stop and timer needs to turn on to give time delay of 5s to close door motor. RUNG 0016įrom the previous rungs memories, an Open door motor is turned ON with three interlocking like closed-door motor, Timer enables, UP/DOWN motor. The string shown inside the Notepad window is what (I think) you’re trying to come up with. To open the lift door when it reaching the floor, Binary bits are used to store the status of Third floor PB and third-floor Limit switch. the screen shot below shows a sample rung in an Allen-Bradley PLC-5 program - and the ASCII text representation of the same rung. To open the lift door when it reaching the floor, Binary bits are used to store the status of First floor PB and First Limit switch. - CPU memory divided in two parts:- Program Files Data Files Program files:- System 0 -Manufacturer program System 1 -Reserve file Ladder 2 -Main user file -ladder 3 to 255 for subroutine program 8. To open the lift door when it reaching floor Binary bits are used to store the status of ground floor PB and ground Limit switch.

In some cases, if someone pressed the second floor PB/First-floor Pushbuttons (PB), the program will check where the lift is, if it is in the ground floor or the first floor, UP Motor will turn ON to get the lift to the respective floor.įor interlocking, normally closed switch of second-floor limit switch and first-floor switch is used in Rung 0009 RUNG 0010, 0011 In some cases,if someone pressed ground floor PB/First floor PB, the program will check where the lift is if it is in the second floor or the first floor, Down Motor will turn ON to get the lift to the respective floor.įor interlocking, normally closed switch of ground limit switch and first-floor switch is used in Rung 0006 Rung 0007, 0008, 0009

Allen bradley ladder logic program