In this video course, you'll learn how to use timers in your PLC program using easy to follow and practical PLC program examples.
Timers are used to either determine how long an event takes (i.e. time it takes to move an object from one point to another), to measure out a period that an event has to last for (i.e. the start button has to be pressed and held for 3 seconds to initiate the process) or as a delay (i.e. process B starts 5 seconds after process A ends).
This video will help beginner programmers use timers in their programs, starting with the structure of the timer, the types of timers and an example program using these timers.
In this lesson you’ll find answers to the following questions:
What types of timers are available in the S7 PLCs?
How do the pulse timers work?
What’s the difference between typical pulse timers and continues pulse timers?
How can you figure out which data type and format every input or outpu...
Let’s see how on-delay timers work.
In this lesson you’re going to learn how the off-delay timers work.
Programming example of how to use pulse timers.
Detailed information for entering times in the “time value” input.
How do extended pulse timers work and how they are different from the normal pulse timers?
Can you duplicate timer addresses?
What happens if you enter an out of range address for timers?
How can you generate a frequent square wave using the pulse timers in STEP 7?
In this lesson I’m going to write program for an industrial gas dryer using extended pulse timers.
This video is a follow-up lesson to lesson 71, in which I showed you an Automatic Industrial Dryer PLC Program.
As one of our viewers pointed out, when this PLC is powered on and enters RUN mode, the liquid valve at the bottom of the dryer automatically opens.
Today I’m going to show you h...
In this lesson you’ll learn how and where you can use the “Not” instruction.
If you suddenly change the rotation direction of a heavy duty motor, the motor is going to be damaged. In this lesson I’m going to write a PLC program that can protect the motor when it’s going to reverse direction. We’ll change the motor rotation direction without damaging it.
In the previous lesson I found out that the motor won’t reverse direction after the delay. In this lesson I’m going to complete the program to solve this issue.
In the previous lesson I wrote a PLC program to safe guard a press machine. In this lesson I’m going to make that program more advanced using an on-delay timer.
Is “STEP 7 V13” Scary?
I’m good with “STEP 7 V5.5” why should I learn to work with version 13?
What are the different versions of STEP 7 V13?
What are the hardware and software requirements for your computer to be able to install STEP 7 V13?
Can of STEP 7 V13 be installed in Parallel with the older versions of STEP 7, WinCC and WinCC flexible?
http://sie.ag/1LNeXA6
How to create a new project in STEP 7 V13 (TIA Portal)
Is the hardware configuration in the new version different from the old version?
Let's write our first PLC program in STEP 7 V13 (TIA Portal)
In a factory that manufactures steel pipes they use a system named water test to make sure that the pipes are manufactured properly. In this and the next lessons, I’m going to write a PLC program using on-delay and off-delay timers to control this test procedure automatically.
Let’s start writing the PLC program
Let’s complete the PLC program we wrote in the previous lesson and test it to see how it actually works.
One of the things that some beginner PLC programmers sometimes struggle with is using open and close contact in the software. In this and next lesson, I’m going to clear this up by using a few simple examples.
Let’s replace the normally open stop switch with a normally closed one and write the program once again.
