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PLC with ARDUINO (ATmega 328p)

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Contents
1 INTRODUCTION
2 TECHNICAL SPECIFICATIONS
3 CHANGES COMPARED TO THE PREVIOUS VERSION (V4)
4 ELECTRONIC SCHEMATIC
5 PCB BOARD DESIGN - Order now at JLCPCB
6 LIST OF ELECTRONIC COMPONENTS
7 STEPS TO UPLOAD A PROGRAM
8 EXTERNAL PARTS AND CONNECTIONS
9 LIST OF EXTERNAL TERMINALS AND ATMEGA328P-AU
10 TEST CODES
10.1 OUTPUTS
10.2 INPUTS AND OUTPUTS
10.3 ANALOG INPUTS
10.4 SERIAL PLOTER
10.5 REAL TIME CLOCK (RTC)
INTRODUCTION

At the beginning of this year 2020 a video of the PLC V4 was published. whose device still had to be improved, therefore, for this version 4.1, a Real Time Clock and a DC DC step down source have been integrated.

PLC with arduino (ATmega328p AU) V4.1, is a programmable logic controller that was designed by Electroall, whose circuit is based on the SIEMENS S7 1200 CPU1214c PLC device with relay outputs. Initially, the current version will have a 24VDC power supply like all industrial devices. In addition, it includes a Real Time Clock (RTC). Secondly, in this version there will be 8 digital inputs of 12-24VDC and 2 analog inputs of 0 to 5V . As for the outputs, there will be 8 outputs (relay).

For the control system, the ATmega328P AU (SMD) microcontroller will be used, since this µC can be easily programmed in the arudino IDE. On the other hand, this PLC will be programmed directly by computer - PLC V4.1. Finally, this device has the principles of high isolation similar to most industrial devices, both in the phase of the inputs and the outputs.


TECHNICAL SPECIFICATIONS

  1. Supply voltage ………………………. ………… 24VDC
  2. Supply current …………………. …………… 100mA
  3. DC source - DC step down ………………………………… .Yes
  4. Real Time Clock …………………………………………… Yes
  5. 12-24VDC digital inputs ………………………. …… 8
  6. 0-5V analog inputs ……………………………… ..2
  7. Direct Programming ……………………………………… ..Computer - PLC V4.1
  8. Programming environment ……………………… .. ……… ..Arduino IDE
  9. Environmental conditions min ……………………….….-10 °
  10. Environmental conditions max ………………… .. ……… .55 °
  11. RLY outputs ………………………………………………………… 8
  12. AC output voltage …………………………………………. …… 250V
  13. AC current ……………………………………………………… .5A
  14. DC voltage ………………………………………………………… 30V
  15. DC current ……………………………………………………… 5A
  16. Dimensions ……………………………………………………… .100x100mm
  17.  Recessed ………………………………………………………… Yes

ELECTRONIC SCHEMATIC



ELECTRONIC COMPONENT LIST

STEPS TO UPLOAD A PROGRAM

  • STEP 1: UPLOAD BOOT MANAGER (BOOTLOADER)

    To be able to use a new microcontroller (atmega328p-U), it is necessary to upload a boot loader, also called "BOOTLOADER", this will make it easier for us to upload programs in future occasions.

    finally to burn the bootloader it will have to be done through the ICSP pins, which would practically be the pins [(MOSI = 11) (MISO = PIN12) (SCK = PIN13) (Slave = PIN10)]. To upload and burn the bootloader we will need an Arduino UNO or MEGA and make the following connections (ARDUINO UNO - PLC).







STEP 2: UPLOAD THE PROGRAM; PC - PLC

After having uploaded the bootloader, we will finally be able to upload any program as we normally do through the serial port.



STEP 2: UPLOAD THE PROGRAM; PC - PLC  

After having uploaded the bootloader, we will finally be able to upload any program as we normally do through the serial port.

EXTERNAL PARTS AND CONNECTIONS








LIST OF EXTERNAL TERMINALS AND ATMEGA328P-AU
TEST CODES

OUTPUTS
// DIGITAL OUTPUTS
int Q0_0 = 10 ;
int Q0_1 = 11 ;
int Q0_2 = 12 ;
int Q0_3 = 13 ;
int Q0_4 = 14 ;
int Q0_5 = 15 ;
int Q0_6 = 16 ;
int Q0_7 = 17 ;
void setup () {
// DIGITAL OUTPUTS
pinMode ( Q0_0, OUTPUT ) ;
pinMode ( Q0_1, OUTPUT ) ;
pinMode ( Q0_2, OUTPUT ) ;
pinMode ( Q0_3, OUTPUT ) ;
pinMode ( Q0_4, OUTPUT ) ;
pinMode ( Q0_5, OUTPUT ) ;
pinMode ( Q0_6, OUTPUT ) ;
pinMode ( Q0_7, OUTPUT ) ;
}
void loop () {
digitalWrite ( Q0_0, 1 ) ;
delay ( 1000 ) ;
digitalWrite ( Q0_0, 0 ) ;
delay ( 1000 ) ;
digitalWrite ( Q0_1, 1 ) ;
delay ( 1000 ) ;
digitalWrite ( Q0_1, 0 ) ;
delay ( 1000 ) ;
digitalWrite ( Q0_2, 1 ) ;
delay ( 1000 ) ;
digitalWrite ( Q0_2, 0 ) ;
delay ( 1000 ) ;
digitalWrite ( Q0_3, 1 ) ;
delay ( 1000 ) ;
digitalWrite ( Q0_3, 0 ) ;
delay ( 1000 ) ;
digitalWrite ( Q0_4, 1 ) ;
delay ( 1000 ) ;
digitalWrite ( Q0_4, 0 ) ;
delay ( 1000 ) ;
digitalWrite ( Q0_5, 1 ) ;
delay ( 1000 ) ;
digitalWrite ( Q0_5, 0 ) ;
delay ( 1000 ) ;
digitalWrite ( Q0_6, 1 ) ;
delay ( 1000 ) ;
digitalWrite ( Q0_6, 0 ) ;
delay ( 1000 ) ;
digitalWrite ( Q0_7, 1 ) ;
delay ( 1000 ) ;
digitalWrite ( Q0_7, 0 ) ;
delay ( 1000 ) ;
}
INPUTS AND OUTPUTS
// DIGITAL TICKETS
int i0_0 = 2;
int i0_1 = 3;
int i0_2 = 4;
int i0_3 = 5;
int i0_4 = 6;
int i0_5 = 7;
int i0_6 = 8;
int i0_7 = 9;
// DIGITAL OUTPUTS
int Q0_0 = 10;
int Q0_1 = 11;
int Q0_2 = 12;
int Q0_3 = 13;
int Q0_4 = 14;
int Q0_5 = 15;
int Q0_6 = 16;
int Q0_7 = 17;
void setup () {
//DIGITAL TICKETS
pinMode ( i0_0, INPUT ) ;
pinMode ( i0_1, INPUT ) ;
pinMode ( i0_2, INPUT ) ;
pinMode ( i0_3, INPUT ) ;
pinMode ( i0_4, INPUT ) ;
pinMode ( i0_5, INPUT ) ;
pinMode ( i0_6, INPUT ) ;
pinMode ( i0_7, INPUT ) ;
// DIGITAL OUTPUTS
pinMode ( Q0_0, OUTPUT ) ;
pinMode ( Q0_1, OUTPUT ) ;
pinMode ( Q0_2, OUTPUT ) ;
pinMode ( Q0_3, OUTPUT ) ;
pinMode ( Q0_4, OUTPUT ) ;
pinMode ( Q0_5, OUTPUT ) ;
pinMode ( Q0_6, OUTPUT ) ;
pinMode ( Q0_7, OUTPUT ) ;
}
void loop () {
// READING OF DIGITAL INPUTS
int I0_0 = digitalRead ( i0_0 ) ;
int I0_1 = digitalRead ( i0_1 ) ;
int I0_2 = digitalRead ( i0_2 ) ;
int I0_3 = digitalRead ( i0_3 ) ;
int I0_4 = digitalRead ( i0_4 ) ;
int I0_5 = digitalRead ( i0_5 ) ;
int I0_6 = digitalRead ( i0_6 ) ;
int I0_7 = digitalRead ( i0_7 ) ;
// TURNING ON THE OUTPUTS ACCORDING TO THE RESPECTIVE INPUTS
if ( I0_0 == 1 ) digitalWrite ( Q0_0, 1 ) ;
else digitalWrite ( Q0_0, 0 ) ;
if ( I0_1 == 1 ) digitalWrite ( Q0_1, 1 ) ;
else digitalWrite ( Q0_1, 0 ) ;
if ( I0_2 == 1 ) digitalWrite ( Q0_2, 1 ) ;
else digitalWrite ( Q0_2, 0 ) ;
if ( I0_3 == 1 ) digitalWrite ( Q0_3, 1 ) ;
else digitalWrite ( Q0_3, 0 ) ;
if ( I0_4 == 1 ) digitalWrite ( Q0_4, 1 ) ;
else digitalWrite ( Q0_4, 0 ) ;
if ( I0_5 == 1 ) digitalWrite ( Q0_5, 1 ) ;
else digitalWrite ( Q0_5, 0 ) ;
if ( I0_6 == 1 ) digitalWrite ( Q0_6, 1 ) ;
else digitalWrite ( Q0_6, 0 ) ;
if ( I0_7 == 1 ) digitalWrite ( Q0_7, 1 ) ;
else digitalWrite ( Q0_7, 0 ) ;
}
ANALOG INPUTS
// DIGITAL OUTPUTS
int Q0_0 = 10;
int Q0_1 = 11;
int Q0_2 = 12;
int Q0_3 = 13;
int Q0_4 = 14;
int Q0_5 = 15;
int Q0_6 = 16;
int Q0_7 = 17;
void setup () {
pinMode ( Q0_0, OUTPUT ) ;
pinMode ( Q0_1, OUTPUT ) ;
pinMode ( Q0_2, OUTPUT ) ;
pinMode ( Q0_3, OUTPUT ) ;
pinMode ( Q0_4, OUTPUT ) ;
pinMode ( Q0_5, OUTPUT ) ;
pinMode ( Q0_6, OUTPUT ) ;
pinMode ( Q0_7, OUTPUT ) ;
}
void loop () {
// ANALOG INPUT AI0
if ( analogRead ( A6 )> = 250 ) digitalWrite ( Q0_0,1 ) ;
else digitalWrite ( Q0_0,0 ) ;
if ( analogRead ( A6 )> = 500 ) digitalWrite ( Q0_1,1 ) ;
else digitalWrite ( Q0_1,0 ) ;
if ( analogRead ( A6 )> = 750 ) digitalWrite ( Q0_2,1 ) ;
else digitalWrite ( Q0_2,0 ) ;
if ( analogRead ( A6 )> = 1000 ) digitalWrite ( Q0_3,1 ) ;
else digitalWrite ( Q0_3,0 ) ;
// ANALOG INPUT AI1
if ( analogRead ( A7 )> = 250 ) digitalWrite ( Q0_4,1 ) ;
else digitalWrite ( Q0_4,0 ) ;
if ( analogRead ( A7 )> = 500 ) digitalWrite ( Q0_5,1 ) ;
else digitalWrite ( Q0_5,0 ) ;
if ( analogRead ( A7 )> = 750 ) digitalWrite ( Q0_6,1 ) ;
else digitalWrite ( Q0_6,0 ) ;
if ( analogRead ( A7 )> = 1000 ) digitalWrite ( Q0_7,1 ) ;
else digitalWrite ( Q0_7,0 ) ;
}
SERIAL PLOTER
void setup () {
Serial. begin ( 9600 ) ;
pinMode ( 10, OUTPUT ) ;
pinMode ( 11, OUTPUT ) ;
pinMode ( 12, OUTPUT ) ;
pinMode ( 13, OUTPUT ) ;
pinMode ( 14, OUTPUT ) ;
pinMode ( 15, OUTPUT ) ;
pinMode ( 16, OUTPUT ) ;
pinMode ( 17, OUTPUT ) ;
}
void loop () {
Serial. println ( analogRead ( A6 )) ;
//Serial.println(analogRead(A7));
}
REAL TIME CLOCK (RTC)











// {== [=======> (RTC AND TEMPERATURE) <=======] ==}
#include <Wire.h>
#include "Sodaq_DS3231.h"
char Weekday [] [ 4 ] = { "Sun" , "Mon" , "Tue" , "Wed" , "Thu" , "Fri" , "Sat" } ;
int Q0_0 = 10;
int Q0_1 = 11;
int Q0_2 = 12;
int Q0_3 = 13;
int Q0_4 = 14;
int Q0_5 = 15;
int Q0_6 = 16;
int Q0_7 = 17;
// The line sets the date, time and day of the week, the line must be deleted in the second load
// Example 2020 August 05, 9:00:00 day 1-Monday (0 = Sun, 1 = Mon, 2 = Tue, 3 = Wed, 4 = Thu, 5 = Fri, 6 = Sat)
// DateTime dt (2020, 8, 5, 20, 40, 00, 2);
void setup ()
{
Serial. begin ( 9600 ) ;
Wire. begin () ;
rtc. begin () ;
// The line sets the date, time and day of the week, the line must be deleted in the second load
//rtc.setDateTime(dt);
pinMode ( Q0_0, OUTPUT ) ;
pinMode ( Q0_1, OUTPUT ) ;
pinMode ( Q0_2, OUTPUT ) ;
pinMode ( Q0_3, OUTPUT ) ;
pinMode ( Q0_4, OUTPUT ) ;
pinMode ( Q0_5, OUTPUT ) ;
pinMode ( Q0_6, OUTPUT ) ;
pinMode ( Q0_7, OUTPUT ) ;
}
void loop () {
DateTime now = rtc. now () ;
Serial. print ( now. date () , DEC ) ;
Serial. print ( '/' ) ;
Serial. print ( now. month () , DEC ) ;
Serial. print ( '' ) ;
Serial. print ( now. hour () , DEC ) ;
Serial. print ( ':' ) ;
Serial. print ( now. minute () , DEC ) ;
Serial. print ( ':' ) ;
Serial. print ( now. second () , DEC ) ;
Serial. print ( '' ) ;
Serial. println ( DayWeek [ now. dayOfWeek ()]) ;
delay ( 1000 ) ;
if (( now. hour () == 20 ) && ( now. minute () == 20 )) {
digitalWrite ( Q0_0, 1 ) ;
if (( now. second ()> = 30 )) {
digitalWrite ( Q0_1, 1 ) ;
}
}
else {
digitalWrite ( Q0_0, 0 ) ;
digitalWrite ( Q0_1, 0 ) ;
}
}

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