- #Light sequencing ladder logic program examples how to#
- #Light sequencing ladder logic program examples series#
#Light sequencing ladder logic program examples how to#
Solution:- See our topic on this site “ How to troubleshoot three phase induction motor ”. Example-4:- Make STAR-DELTA starter control circuit diagram. This circuit depends on timer setting, if you use multifunction timer. For this circuit we use one relay, one ON delay timer, two push buttons and one lamp (+24VDC operated).įollowing line diagram for this example:- RLC Ladder Logic for Lamp Solution:- In this circuit we used ON delay Timer. Both lamps connect as per following image:- Lamp Connection with relay diagram Example-3:- Lamp should be ON after 5minute, if we press Push button 0VDC connect direct with lamp and +24VDC goes through Relay. Step-3:- In this step we connect lamp with relay.
#Light sequencing ladder logic program examples series#
STEP-2:- Now we interlock both relay, if push button-2 NC point connect in series with NO point (holding point) of relay-1 and Push button-1 NC point connect with NO point(holding point) of relay-2 as per following line diagram. Relay-1 uses for Lamp-1 and Relay-2 uses for Lamp-2. STEP-1 :-First we hold relay individually with push button, it means using Push button-1, we hold relay-1 and using push button-2, we hold relay-2. Now it’s is very easy to make line diagram. As per following image, P1 push button work as Stop button for Lamp-2 and P2 push button work as stop button for lamp-1. SOLUTION:- First we make flow chart of this circuit. If we press push button-2(P2), lamp-2(L2) permanent ON and Lamp-1(L1) OFF, that cycle is running but we press stop push button(P3) Cycle stop. When we pressed push button-1(P1), Lamp-1(L1) should be permanent ON and Lamp-2(L2) OFF. Now we give you twist with next example:- Example-2:- We have two start push button and one stop push button, and two lamps (+24VDC). I think you easily understood above example.
Now we make line diagram of above example. Using this figure you can easily understand this Example, Now you can do Online practical own self. How? Here we use NC push button to disconnect the supply. If we disconnect this supply using any element or device relay will be OFF. Now we want to OFF this relay, how we OFF this relay? Listen! On above example supply permanent coming from NO point that supply do continue ON Relay. If we release Push button supply cuts from the push button but the supply is permanently coming from NO point and relay permanently ON or on hold. Now +24VDC supply direct connect to A1 and relay turned ON. When we press Push button supply goes to relay, Relay turned ON and contact changes NO point became NC point. We connect +24VDC to COM point of relay and NO point to A1 Point of relay. How we use this contact see in figure:- relay hold using one push button So here we think what we shall do for relay to hold. When we press push button, supply goes to relay A1 point and relay gets ON and its contact changes, but when we release push button supply cutoffs and relay gets off. We connect relay and push button as per figure. These two step we see in following picture:- Relay logic control wiring diagram Step 2:- When supply comes to relay coil, relay should be ON. Step 1:- When we press push button, relay should be on, It means we use NO push button because when we press this switch supply goes forward. Solution:- This is basic example of relay logic, first we create step for this circuit. Now here we take one example for Relay logic: Example:- One relay should be hold using one push button. With help of following example we can easily understand relay logic. Here I am telling to you How to create Relay Logic Circuit .īefore creating relay logic, following point should be in mind :-ġ-You should know very well about operation’s sequence of machine and circuit.Ģ-All spares (Relay, timer, switch etc) should be available.ģ- Write sequence of operational steps in table form or flow control chart.
In previous chapter Relay Logic Circuit (RLC) we discussed about relay logic elements which are used in relay logic.
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