OpenPLC-with-LDmicro/C2/Normal-Coil/English
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| Slide 1: | Welcome to the spoken tutorial on Normal Coil. |
Slide 2: Learning Objectives
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In this tutorial, we will learn about the working of
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Slide 3: System Requirements
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To record this tutorial I am using:
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Slide 4: Pre-requisites
If not, please refer to the relevant tutorials from Home | spoken-tutorial.org |
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| Slide 5: Prerequisites - Hardware setup
hardware-prerequisite.jpg |
Connect SMPS and USBasp to the Mainboard as shown in the picture.
Keep these connections throughout this tutorial. |
| Open LDmicro | Let us open LDmicro. |
| Click ‘Instructions -> Insert Coil’ | Insert a Coil from Instructions as shown. |
| We can observe that Coil is an output instruction. | |
| Double-click on the coil | Double-click on the Coil. |
| Highlight ‘Type’ and ‘Source’ | A dialog box opens.
Here we can see two columns named ‘Type’ and ‘Source’. |
| Point to the types | We can see there are four types of coils.
They are Normal, Negated, SET-Only and RESET-Only Coils. These coils have two source types which are Pin on MCU and Internal Relay. |
| Point to Normal, Pin on MCU | By default, the type of the coil is set to ‘Normal’ and source to ‘Pin on MCU’.
Pin on MCU means that the coil represents a pin on the microcontroller. |
| Don’t change them.
Keep the default settings as it is. | |
| Point to other types | We will learn about other types of Coils and source types in the later tutorials. |
| Rename the coil as LED >> Click the OK button. | Rename the Coil as LED and click on the OK button.
Remember that LDmicro is case sensitive. |
| Highlight the rung | Note that the Coil is directly connected to the positive rail.
So, the input to the Coil is logic 1. |
| Now we will check the working of this logic. | |
| Click ‘Simulate -> Simulation mode’ >> Click ‘Simulate -> Real-time simulation’ | Let us turn on the simulation mode.
For that, click Simulate and then on Simulation mode. Next, start real-time simulation as shown. |
| Highlight state of YLED in the I/O list | Observe the state of YLED in the I/O list. |
| Highlight the state of LED in I/O list at the bottom of the screen | We can observe the state of YLED is 1.
That is for a Normal Coil when the input is true, the output is also true. |
| Click 'Simulate -> Halt Simulation' >> Click 'Simulate -> Simulation Mode' | Now, turn off the simulation mode.
For that, click Simulate and then on Halt Simulation. Then click Simulate and Simulation Mode |
| Now let us compile the logic.
The detailed steps on how to compile and save the logic are explained in the earlier tutorials. | |
| Click on Settings >> Click on Microcontroller >> Select AVR ATmega16 40-PDIP
Click on Settings >> Click on MCU parameters >> Change Crystal frequency to 16 >>Click OK button |
Click on Settings and select the microcontroller AVR ATmega16 40-PDIP.
Adjust its parameters as shown here. |
| Double-click on YLED in I/O list >> Select PA0 >> Click OK button | Double-click on the YLED in the I/O list.
Then, assign pin PA0 to the coil ‘YLED’. |
| Click on Compile >> Click on Compile >> Go to Desktop/LDmicro folder >> Rename it as ‘normalcoil.hex’ >> Click on Save.
Click OK button |
Compile the logic and save the hex file as ‘normalcoil.hex’. |
| Click on File >> Click on Save >> Go to Desktop/LDmicro folder >> Rename it as ‘normalcoil.ld’ >> Click on Save | Then save the ladder diagram as ‘normalcoil.ld’. |
| Now we will see the working of this logic on hardware. | |
| Connect Mainboard to PC using USBasp
laptop-usbasp.jpg |
Connect the Mainboard to your laptop using USBasp.
Turn on the power supply. |
| Open terminal >> Type cd Desktop/LDmicro >> Press ENTER >> Type avrdude -c usbasp -p m16 -U flash:w:normalcoil.hex >> Press ENTER | Open the Terminal by pressing CTRL+ALT+T keys simultaneously.
Go to the folder where you saved the hex file. Type the command as shown to upload this hex file to the Mainboard. |
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Remove the USBasp connection from the laptop. |
Turn off the power supply.
Remove the USBasp connection from the laptop. This will prevent any hardware damage. |
| normalcoil.png | Let us see the connection details now. |
| normalcoil.png | Connect GND pin of the red LED of Traffic Light module to GND pin of the Mainboard.
Then connect the +5V pin of the red LED to PA0 pin of the Mainboard. Make the connections as shown in the picture. |
| Now turn on the power supply. | |
| We can observe that the red LED is glowing. | |
| That is the I/O pin PA0 gives the output of the coil which is logic 1. | |
| Thus we learnt working of a Normal Coil using an LED. | |
| Turn off the power supply. | |
| This brings us to the end of this tutorial.
Let us summarize. | |
Slide 5: Summary
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In this tutorial, we learnt about the working of
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| Slide 6: Evaluation
Suppose that the input to Normal Coil is logic 0 What will be the state/output of the Normal Coil? |
Here is a self assessment question for you:
Suppose that the input to Normal Coil is logic 0. What will be the state of the Normal Coil ? |
| Slide 7: Answer
The state of the Normal Coil will be 0 |
The answer is the state of the Normal Coil will be 0. |
| Slide 8:
About Spoken Tutorial project |
The video at the following link summarises the Spoken Tutorial project.
Please download and watch it. |
| Slide 9:
Spoken Tutorial workshops |
The Spoken Tutorial Project team:
For more details, please write to us |
| Slide 10:
Forum for specific questions: |
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| Slide 11:
Forum for specific questions: |
Do you have any general / technical questions on OpenPLC?
Please visit the FOSSEE forum and post your question. |
| Slide 12:
Acknowledgement |
Spoken Tutorial Project is funded by MHRD, Government of India. |
| Slide 13:
Thank you slide |
This tutorial has been contributed by FOSSEE and Spoken Tutorial Project, IIT Bombay.
And this is Harsha Priyanka from FOSSEE team, signing off. Thanks for watching. |
