M5Stack#Using LAN to communicate with Siemens PLC

M5Stack_EN, Siemens, Work

M5Stack W5500 LAN Module

This module contains the W5500 chip with M5Base, and can easily realize Internet connection with TCP/IP Ethernet Controller. And HT3.96 connector 485Interface is also available. You can also connect to other circuits with its HT3.96 connector.

Please find more information from here:

https://docs.m5stack.com/en/base/lan_base

You can buy from here:

https://www.switch-science.com/catalog/3994/

Settimino Library 

Settimino is used in this tutorial and you can use it to build the communication between Siemens PLC (S7-1200,1500,300,400,200,LOGO)and でArduino/ESP8266/ESP32.

http://settimino.sourceforge.net/

Installation

Please access this link to download the latest version of that library.

https://sourceforge.net/projects/settimino/files/

Ethernet2 Library

Ethernet2 Library can be used with W5500 Ethernet shields as Server/Client.(Please be careful that older than W5100, you can not use this library.)

Download Link:

https://www.arduino.cc/reference/en/libraries/ethernet2/

Implementation

You need to edit the Settimino.h first.

Because the M5 Stack LAN Module is used in my tutorial, you need to change some code in that file.Go to Line111 and import the M5Core2.h and Ethernet2.h .

Code

Here is the Code.

/*———————————————————————-
M5Stack Sentron emulation

Created 09 Mar 2019
by Davide Nardella

———————————————————————— 
This demo is only for M5Stack hardware.
You need to define M5STACK_WIFI or M5STACK_LAN (see platform.h)
 
———————————————————————-*/
#include <Platform.h>
#include <Settimino.h>

//———————————————————————
// Defining USE_DISPLAY the display will be used for service messages
//———————————————————————
#define USE_DISPLAY

#ifdef USE_DISPLAY
  #define stdout M5.Lcd
#else 
  #define stdout Serial
#endif 

//**********************************************************************
// Connection Variables
//**********************************************************************
// Enter a MAC address and IP address for your controller below.
// The IP address will be dependent on your local network:
byte mac[] = {
  0x90, 0xA2, 0xDA, 0x0F, 0x08, 0xE1 };

// Cabled Network (M5STACK_LAN defined in platform.h)
IPAddress Local(192,168,0,10);  // Local Address
IPAddress Gateway(192, 168, 0, 1);
IPAddress Subnet(255, 255, 255, 0);

// WIFI Network (M5STACK_WIFI defined in platform.h)
// Following constants are needed only if you are connecting via WIFI
// The ssid is the name of my WIFI network (the password obviously is wrong)
char ssid[] = “SKYNET-AIR”;    // Your network SSID (name)
char pass[] = “password”;  // Your network password (if any)

// Remote Address
IPAddress PLC(192,168,0,12);   // PLC Address

//**********************************************************************
// Process Variables
//———————————————————————-
// We assume that DB100 contains 9 Reals starting from 0
// V1,V2,V3 Voltage
// C1,C2,C3 Current
// P1,P2,P3 Power
//**********************************************************************
int DBValues   = 100; // DB containing Data
int OFSValues  = 0;   // Offset of first value
int SizeValues = 36;  // 9 Reals = 36 Byte
//**********************************************************************
// Program Variables
//**********************************************************************
// Pages
#define VOLTAGE 1
#define CURRENT 2
#define POWER   3
#define SERVICE 4

#define PageSwitchTime 4000 // Change Page every 4s if no button was pressed
long Elapsed =0;

int PageColors[4] = {TFT_GREEN,    // Voltage page text color
                    TFT_YELLOW,   // Current page text color
                    TFT_WHITE,    // Power page text color
                    TFT_WHITE};     // Error page text color

// Leading
int xl[3]={15,  15, 15};
int yl[3]={36, 108,180};
// Values
int xv[3]={84, 84,  84};
int yv[3]={10, 82, 154};
// Umes
int xu[3]={260,260,260};
int yu[3]={36, 108,180};

float V[3]={0.0,0.0,0.0}; // TENSION
float C[3]={0.0,0.0,0.0}; // CURRENT
float P[3]={0.0,0.0,0.0}; // POWER

S7Client Client;
int CurrentPage = -1; // To force the first switch

//———————————————————————-
// Checks the elapsed time
//———————————————————————-
bool IsElapsed(long Time)
{
  long Delta=millis()-Elapsed;
  if (Delta<0) // Check millis() rollover (after 49 days)
  {
    Elapsed=millis(); 
    Delta=0;
  }   
  return Delta>=Time;
}
//———————————————————————-
// Mark current time
//———————————————————————-
void MarkTime()
{
  Elapsed=millis();
}
//———————————————————————-
// Switches to a selected page
//———————————————————————-
void SwitchTo(int Page)
{
  if (Page!=CurrentPage) // Avoid unneeded redraw
  {
    PreparePage(Page,PageColors[Page-1]);
    MarkTime();
    CurrentPage=Page;
  }
}
//———————————————————————-
// Draw Sigma symbol (no font available to do it)
//———————————————————————-
void DrawSigma(int x, int y, int Color)
{
  M5.lcd.drawLine(x,y,x+18,y,Color);        
  M5.lcd.drawLine(x,y+1,x+18,y+1,Color);

  M5.lcd.drawLine(x,y,x+9,y+9,Color);
  M5.lcd.drawLine(x+1,y,x+10,y+9,Color);
 
  M5.lcd.drawLine(x,y+18,x+9,y+9,Color);
  M5.lcd.drawLine(x+1,y+18,x+10,y+9,Color);
 
  M5.lcd.drawLine(x,y+18,x+18,y+18,Color); 
  M5.lcd.drawLine(x,y+17,x+18,y+17,Color); 
}
//———————————————————————-
// Prepares the page
//———————————————————————-
void PreparePage(int Page, int Color)
{

  M5.Lcd.fillScreen(TFT_BLACK);
  M5.Lcd.setTextColor(Color, TFT_BLACK);
  if (Page==SERVICE)
  {
    M5.Lcd.setTextSize(2);
    m5.Lcd.setCursor(0,0);
  }
  else
    M5.Lcd.setTextSize(1);

  switch (Page){
    case VOLTAGE:
      // Lead
      M5.Lcd.drawString(“L1”, xl[0], yl[0], 4);
      M5.Lcd.drawString(“L2”, xl[1], yl[1], 4);
      M5.Lcd.drawString(“L3”, xl[2], yl[2], 4);
      // Umes
      M5.Lcd.drawString(“V”, xu[0], yu[0], 4);
      M5.Lcd.drawString(“V”, xu[1], yu[1], 4);
      M5.Lcd.drawString(“V”, xu[2], yu[2], 4);
      break;
    case CURRENT:    
      // Lead
      M5.Lcd.drawString(“L1”, xl[0], yl[0], 4);
      M5.Lcd.drawString(“L2”, xl[1], yl[1], 4);
      M5.Lcd.drawString(“L3”, xl[2], yl[2], 4);    
      // Umes
      M5.Lcd.drawString(“A”, xu[0], yu[0], 4);
      M5.Lcd.drawString(“A”, xu[1], yu[1], 4);
      M5.Lcd.drawString(“A”, xu[2], yu[2], 4);
      break;
    case POWER:
      // Lead
      DrawSigma(xl[0], yl[0], Color);
      M5.Lcd.drawString(“S”, xl[0]+22, yl[0], 4);
      DrawSigma(xl[1], yl[1], Color);
      M5.Lcd.drawString(“P”, xl[1]+22, yl[1], 4);
      DrawSigma(xl[2], yl[2], Color);
      M5.Lcd.drawString(“Q1”, xl[2]+22, yl[2], 4);
      // Umes
      M5.Lcd.drawString(“kVA”, xu[0], yu[0], 4);
      M5.Lcd.drawString(“kW”, xu[1], yu[1], 4);
      M5.Lcd.drawString(“kvar”, xu[2], yu[2], 4);
      break; 
  }
}
//———————————————————————-
// Displays a single floating point value
//———————————————————————-
void WriteValue(int x, int y, float Value)
{
  char sValue[6]={0,0,0,0,0,0};
  dtostrf(Value, 6, 1, sValue);
  M5.Lcd.drawString(sValue, x, y, 7);
}
//———————————————————————-
// Displays 3 values in accord to the current page
//———————————————————————-
void DisplayValues()
{
  M5.Lcd.setTextColor(PageColors[CurrentPage-1], TFT_BLACK);
  switch (CurrentPage){
    case VOLTAGE:
      for (int c=0;c<3;c++)
        WriteValue(xv[c],yv[c],V[c]);  
    break;
    case CURRENT:
      for (int c=0;c<3;c++)
        WriteValue(xv[c],yv[c],C[c]);  
    break;
    case POWER:
      for (int c=0;c<3;c++)
        WriteValue(xv[c],yv[c],P[c]);  
    break;  
  }
}
//———————————————————————-
// Switches to next page
//———————————————————————-
void NextPage()
{
  int Page=CurrentPage+1;
  if (Page>POWER)
    Page=VOLTAGE;
  SwitchTo(Page); 
}
//———————————————————————-
// Setup : Init Ethernet and Serial port
//———————————————————————-
void setup() {
#ifdef M5STACK_LAN
    M5.begin(true, false, true);
#endif   
#ifdef M5STACK_WIFI
    M5.begin(true, false, true);
#endif   

    // Open serial communications and wait for port to open:
    Serial.begin(115200);
   
    SwitchTo(SERVICE); // Service Page
   
#ifdef S7WIFI
//——————————————— ESPXX Initialization   

    stdout.println();
    stdout.println(“Connecting to “);
    stdout.println(ssid);
    WiFi.begin(ssid, pass);
    WiFi.config(Local, Gateway, Subnet);
    while (WiFi.status() != WL_CONNECTED)
    {
        delay(500);
        Serial.print(“.”);
    }
    stdout.println(“”);
    stdout.println(“WiFi connected”); 
    stdout.println(“Local IP address : “);
    stdout.println(WiFi.localIP());
    delay(3000); // Just to see the message
#else
//——————————–Wired Ethernet Shield Initialization   
    EthernetInit(mac, Local);     
    delay(1000);
    stdout.println(“”);
    stdout.println(“Cable connected”); 
    stdout.println(“Local IP address : “);
    stdout.println(Ethernet.localIP());
    delay(3000);  // Just to see the message
#endif  
}
//———————————————————————-
// Connects to the PLC
//———————————————————————-
bool Connect()
{
    int Result=1;
    SwitchTo(SERVICE);
   
    stdout.println(“Connecting to “);
    stdout.println(PLC); 
   
    while (Result!=0)
    {
      Result=Client.ConnectTo(PLC,
                                0,  // Rack (see the doc.)
                                1); // Slot (see the doc.)
      if (Result==0)
      {
        stdout.println(“”);
        stdout.println(“Connected, PDU Length = “);
        stdout.println(Client.GetPDULength());
        delay(300);
        SwitchTo(VOLTAGE);
      }
      else
      {
        stdout.print(“.”);
        delay(500);
      }
    } 
    return Result==0;
}
//———————————————————————-
// Prints the Error number
//———————————————————————-
void CheckError(int ErrNo)
{
  int LastPage = CurrentPage;
 
  SwitchTo(SERVICE);
  stdout.print(“Error No. 0x”);
  stdout.println(ErrNo, HEX);
 
  // Checks if it’s a Severe Error => we need to disconnect
  if (ErrNo & 0x00FF)
  {
    stdout.println(“SEVERE ERROR disconnecting”);
    Client.Disconnect();
  }
  else
  {
    delay(1000);
    SwitchTo(LastPage);
  }
}
//———————————————————————-
// Main Loop
//———————————————————————-
void loop()
{

  // Connects (if needed)
  if (!Client.Connected)
    Connect();
 
  int Result=Client.ReadArea(S7AreaDB,
                            DBValues,   // DB containing Sentron Data
                            OFSValues,  // Offset of first value
                            SizeValues, // Data Packet size
                            NULL);      // Use internal buffer (PDU.DATA[]), small and faster

  if (Result==0)
  {
    V[0]=S7.FloatAt(0);   // Voltage L1
    V[1]=S7.FloatAt(4);   // Voltage L2
    V[2]=S7.FloatAt(8);   // Voltage L3
    C[0]=S7.FloatAt(12);  // Current L1
    C[1]=S7.FloatAt(16);  // Current L2
    C[2]=S7.FloatAt(20);  // Current L3
    P[0]=S7.FloatAt(24);  // Sigma S
    P[1]=S7.FloatAt(28);  // Sigma P
    P[2]=S7.FloatAt(32);  // Sigma Q1
    DisplayValues();
  }
  else
    CheckError(Result);
         
  if (Result==0)
  {
    // Change page detection
    if (M5.BtnA.wasPressed())
      SwitchTo(VOLTAGE);   
 
    if (M5.BtnB.wasPressed())
      SwitchTo(CURRENT);   
     
    if (M5.BtnC.wasPressed())
      SwitchTo(POWER);   
   
    // Auto page switch to avoid display damage on long time
    if (IsElapsed(PageSwitchTime))
    {
      NextPage();
    }
  }

  delay(200); 
  M5.update();
}

Ping

You may use the ping command to check the connection first.

Configuration in Siemens Side.

Go to Protection & Security>Connection mechanisms>and Check the options of “Permit access with PUT/GET communication from remote partner”.

And also Open the Attributes of your DB and uncheck the option of Optimized block access.

You will see the offset field in the DB.

Result

Here is the result:

Footer_Basic

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