View source for OpenPLC-version1-with-LDmicro/C2/OpenPLC-Switchboard-module/English



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|| '''VISUAL CUE'''
|| '''NARRATION'''
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|| Slide 1: 
|| Welcome to the spoken tutorial on '''OpenPLC Switchboard module '''
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|| Slide 2: Learning Objectives

We will learn about
* OpenPLC Switchboard''' '''module
|| 

In this tutorial, we will learn about* '''OpenPLC Switchboard '''module
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|| Slide 3: System Requirements
* Ubuntu Linux 18.04 operating system
* OpenPLC Switchboard module
|| 

To record this tutorial I am using:
* '''Ubuntu Linux 18.04''' operating system
* '''OpenPLC''' '''Switchboard''' module 
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|| Slide 4: Pre-requisites
|| * To follow this tutorial, you should know about '''OpenPLC version 1''' '''Mainboard'''.
* If not, please refer to the relevant tutorials in this series on this website.

|- 
|| Slide 5: SwitchboardThe goal of this module is to get familiarized with different types of switches
In particular their usage in the real time applications in industries

|| 

The goal of this module is to get familiarized with different types of switches.

In particular their usage in the real time applications in industries.
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|| Slide 6: Main Components
4 Normally Open switches
4 Normally Closed switches
2 Latched action switches
LEDs for each switch

|| This module has
*4 Normally Open switches
*4 Normally Closed switches
*2 Latched action switches and
*LEDs for each switch
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|| switchboard.jpg
|| This is the '''Switchboard''' module.
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|| Slide 7: Types of Switches:Normally open (NO)
Normally closed (NC)
Latched action (L)

|| In this module, there are three kinds of switches available.

They are '''Normally Open, Normally Closed '''and''' Latched action switches.'''
|- 
|| switchboard.jpg ( to show with arrow)
|| '''Normally Open''' is represented as '''NO''' and '''Normally Closed''' is represented as '''NC'''.

'''Latched action''' switches are represented as '''L'''.
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|| SB-switches.png
|| We will now look at their arrangement on the module from bottom to top.
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|| SB-switches.png

Highlight Latch switches

Then NC and then NO
|| At the bottom, we have two '''Latched action''' switches.

Above that we have 4 '''Normally Closed''' and then 4 '''Normally Open '''switches.
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|| SB-leds.png

|| Above these switches we have LEDs corresponding to each switch. 

The LEDs are arranged in the same order as that of switches.
|- 
|| 
|| Each LED glow indicates a corresponding switch press.
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|| SB-connectors.png
|| On the top we have female berg connectors for connections.
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|| SB-connectors-z.png

Point to each particular pin
|| Next, we will see about the pins.

Starting from the right, the first two pins are GND and 5V respectively.

These are the input power pins of this module.

Then we have 4 pins for 4 '''NO switches '''and''' '''4 pins for 4 '''NC switches.''' 

The last 2 pins are for 2 '''latched action switches'''.
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|| Slide 8: Important Note
* NO and latched action switches must be connected to the I/Os of the microcontroller
* Only then the LEDs of the corresponding switches will work
* Note that LEDs of NC switches will work, even if they are not connected to I/Os

|| '''NO''' and '''Latched action''' switches must be connected to the I/Os of the microcontroller.

Only then the LEDs of the corresponding switches will work.

Note that LEDs of '''NC''' switches will work, even if they are not connected to I/Os of the microcontroller.
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|| 
|| Now, we’ll learn how each type of the switch works.
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|| Slide 9: Normally Open switchThe output pin of a '''NO switch '''will read logic 0 when it is not pressed
When the switch is pressed, the output pin will read 5V
This is due to the supply from the microcontroller’s internal pull up register

|| The output pin of a '''NO switch '''will read logic 0 when it is not pressed.

When the switch is pressed, the output pin will read 5V.

This is due to the supply from the microcontroller’s internal pull up register.
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|| Slide 10: Normally Closed switchThe output pin of a NC switch will read 5V when it is not pressed
This is due to the supply from the microcontroller’s internal pull up register
Upon switch press, the output pin will read logic 0 or ground

|| The output pin of a '''NC switch''' will read 5V when it is not pressed.

This is due to the supply from the microcontroller’s internal pull up register.

Upon switch press, the output pin will read logic 0 or '''Ground'''.
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|| Slide 11: Latched action switchIt is basically a '''push-to-make,''' '''push-to-break''' type of switch
That is, the output pin will read 5V, when it is pressed for the first time
The output pin will read 0V, when it is pressed for the second time

|| '''Latched action''' switch is basically a '''push-to-make,''' '''push-to-break''' type of switch.

That is, the output pin will read 5V, when it is pressed for the first time.

The output pin will read 0V, when it is pressed for the second time.

Working of the LED of a''' latched action switch '''corresponds to that of a''' NO switch.'''
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|| Slide 12:How can the Switchboard module be powered?

Switchboard module can be powered using the output power pins of the Mainboard
|| How can the Switchboard module be powered?

It can be powered using the output power pins of the '''Mainboard'''.
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|| 
|| We have learnt about the different types of switches in the '''Switchboard''' module.
|- 
|| 
|| This brings us to the end of the tutorial.

Let us summarize.
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|| Slide 13: Summary* OpenPLC''' '''Switchboard''' '''module

|| In this tutorial, we learnt about
* '''OpenPLC Switchboard '''module

|- 
|| Slide 14:

About Spoken Tutorial project
|| The video at the following link summarises the Spoken Tutorial project.

Please download and watch it
|- 
|| Slide 15:

Spoken Tutorial workshops
|| The''' Spoken Tutorial Project''' team:* <div style="margin-left:1.27cm;margin-right:-0.106cm;">conducts workshops using spoken tutorials and
gives certificates on passing online tests.

For more details, please write to us
|- 
|| Slide 16:

Forum for specific questions:
|| Please post your timed queries in this forum
|- 
|| Slide 17:

Forum for specific questions:
|| Do you have any general / technical questions on OpenPLC?

Please visit the FOSSEE forum and post your question.
|- 
|| Slide 18:

Acknowledgement
|| Spoken Tutorial Project is funded by MHRD, Government of India.
|- 
|| Slide 19:

Thank you slide
|| This tutorial has been contributed by FOSSEE and Spoken Tutorial Project, IIT Bombay.

And this is Harsha Priyanka from the FOSSEE team, signing off.

Thanks for watching.
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