![study the ladder logic program in figure 7-41 and answer the following study the ladder logic program in figure 7-41 and answer the following](https://venturebeat.com/wp-content/uploads/2019/11/siripersreqs.jpg)
![study the ladder logic program in figure 7-41 and answer the following study the ladder logic program in figure 7-41 and answer the following](https://media.cheggcdn.com/study/aa3/aa346002-10cb-4ff1-b030-8895615dbec2/719656-7-6IP1.png)
![study the ladder logic program in figure 7-41 and answer the following study the ladder logic program in figure 7-41 and answer the following](https://cv01.studmed.ru/view/76de4c7fdfd/bga9.png)
After 12 part stacking, conveyor starts and moves the stack to position B.ON button is used to start the process and stacker starts stacking.At point B, paint is applied for 12 sec after painting is completed, the conveyor restart s manually and moves to position C and stops automatically and stack is removed. When 12 parts (stack) are placed on the conveyor, it turns ON and moves the stack at the position B.Ī sensor is used to stop the conveyor at B. stack height is controlled by PLC counter function. When the ON button is pushed, a stacker starts stacking plywood sheet at position A. 3 Way Traffic Light Control using PLC LogicĮxample 5 Develop ladder logic for an automatic paint process.The same sequence is followed by each side.The green light of each side is ON for 10 sec only one side at a time and the same time, the respected red light is ON for 30sec.We have to control the traffic of 4 roads.When the level in the tank falls below 10%, close the output valve.Įxample 4 Develop ladder logic for traffic control.when this temperature is reached, turn OFF the heater & open the outlet valve.When the tank is filled, turn ON the heater to raise the temperature up to 70 deg. The fan may be turned OFF by pushing a separate fan reset switch.Įxample 3 Develop the ladder logic to fill the tank. if the saw has run more than 1 min, the fan should stay ON indefinitely. STOP push-button stops the saw only before fan stops it should run for an additional 5 sec to blow the chips away and also the tube pump is to run for 8 sec.
![study the ladder logic program in figure 7-41 and answer the following study the ladder logic program in figure 7-41 and answer the following](https://s1.manualzz.com/store/data/006960856_1-da87d7bc8316c2016b5c697d87323c03.png)
A wood saw cutter (W), a fan (F) and a lubrication pump (P) turns on when a START push button is pushed.Finally, release this mixture through valve V2.Įxample 2 Develop a ladder program for wood saw cutter.After mixing & heating turn OFF the stirrer & heater.If a high level is reached turn ON the stirrer & heater at a time.Then check the level, is it high level is reached or not.On button to start the process when motor start and V1 is open.Limit block is used turn OFF each output in respective sequence.Example 1 To develop a ladder diagram for the ON/OFF temperature controller for the continuous process of heating of mixture. When T4:0 accumulator value reaches 20,outputs Q5.Q6,Q7 & Q8 turns ON along with timer T4:1 which presets for 20 second.
STUDY THE LADDER LOGIC PROGRAM IN FIGURE 7 41 AND ANSWER THE FOLLOWING SERIES
Greater than or equal and Less than or equal block is connected in series with Q4 (O:0/3),When accumulator value between 16 to 20 triggers Q4 turns ON. Greater than or equal and Less than or equal block is connected in series with Q3 (O:0/2),When accumulator value between 11 to 15 triggers Q3 turns ON. Greater than or equal and Less than or equal block is connected in series with Q2 (O:0/1),When accumulator value between 6 to 10 triggers Q2 turns ON. Greater than or equal and Less than or equal block is connected in series with Q1 (O:0/0),When accumulator value between 0 to 5 triggers Q1 turns ON. Normally closed contact of T4:1 timer done bit is connected to make the process continue until stop PB is pressed. Latched B3:0/0 is connected with T4:0 which starts running. Latching rung to operate the system through Master Start and Stop PB.