Read data from N7 files with microsoft visual C# and DF1 protocol of Allen-Bradley Micrologic 1000. DF1 communication using serial port with setting: baud rate=9600, data bits=8, parity=none, stopbits=one and CRC 16.
Download Project File for C#, click here
PortName in C# with your serial port number.
Download Ladder Programming for Allen-Bradley Micrologic 1000, click here
Video about Read data From Allen-Bradley MicroLogix 1000
Microsoft visual c# code for Read Data from Allen-Bradley PLC :
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace DF1Read
{
public partial class Form1 : Form
{
int OrderIncrement = new Random().Next(1, 127);
private byte[] CommandRead = new byte[17];
int value;
public Form1()
{
InitializeComponent();
}
public void ReadN7(byte StartingElementNumber, int numberOfRead)
{
if (numberOfRead < 1)
return;
if (!serialPort1.IsOpen)
serialPort1.Open();
if (OrderIncrement < 65535)
{
OrderIncrement += 1;
}
else
{
OrderIncrement = 1;
}
CommandRead[0] = 16;
CommandRead[1] = 2;
CommandRead[2] = 0;
CommandRead[3] = 0;
CommandRead[4] = 0xf;
CommandRead[5] = 0;
CommandRead[6] = (byte)(OrderIncrement & 255);
CommandRead[7] = (byte)(OrderIncrement >> 8);
CommandRead[8] = 0xa1;
//* Number of bytes to read -
CommandRead[9] = (byte)(numberOfRead * 2);
//* File Number
CommandRead[10] = 7;
//* File Type
CommandRead[11] = 137;
//N
//Starting Element Number
CommandRead[12] = StartingElementNumber;
byte[] dataforcrc = new byte[11];
for (int i = 0; i <= 10; i += 1)
{
dataforcrc[i] = CommandRead[2 + i];
}
int CheckSumCalc;
CheckSumCalc = CalculateCRC16(dataforcrc);
CommandRead[13] = 16;
CommandRead[14] = 3;
CommandRead[15] = (byte)(CheckSumCalc & 255);
CommandRead[16] = (byte)(CheckSumCalc >> 8);
byte[] ACKSequence = {16,6};
if (serialPort1.IsOpen)
{
serialPort1.Write(ACKSequence, 0, 2);
serialPort1.Write(CommandRead, 0, CommandRead.Length);
}
}
private int CalculateCRC16(byte[] DataInput)
{
int iCRC = 0;
byte bytT = 0;
for (int i = 0; i <= DataInput.Length - 1; i++)
{
bytT = (byte)((iCRC & 0xff) ^ DataInput[i]);
iCRC = (int)((iCRC >> 8) ^ CRC16table[bytT]);
}
bytT = (byte)((iCRC & 0xff) ^ 3);
iCRC = (int)((iCRC >> 8) ^ CRC16table[bytT]);
return iCRC;
}
int[] CRC16table = {0x0,0xc0c1,0xc181,0x140,0xc301,0x3c0,0x280, 0xc241,
0xc601, 0x6c0, 0x780, 0xc741, 0x500, 0xc5c1, 0xc481, 0x440,
0xcc01, 0xcc0, 0xd80, 0xcd41, 0xf00, 0xcfc1, 0xce81, 0xe40,
0xa00, 0xcac1, 0xcb81, 0xb40, 0xc901, 0x9c0, 0x880,
0xc841, 0xd801, 0x18c0, 0x1980, 0xd941, 0x1b00, 0xdbc1, 0xda81,
0x1a40, 0x1e00, 0xdec1, 0xdf81, 0x1f40,
0xdd01, 0x1dc0, 0x1c80, 0xdc41, 0x1400, 0xd4c1, 0xd581, 0x1540,
0xd701, 0x17c0, 0x1680, 0xd641, 0xd201, 0x12c0, 0x1380, 0xd341,
0x1100, 0xd1c1, 0xd081, 0x1040, 0xf001, 0x30c0, 0x3180, 0xf141,
0x3300, 0xf3c1, 0xf281, 0x3240, 0x3600, 0xf6c1, 0xf781, 0x3740,
0xf501, 0x35c0, 0x3480, 0xf441, 0x3c00, 0xfcc1, 0xfd81,
0x3d40, 0xff01, 0x3fc0, 0x3e80, 0xfe41, 0xfa01, 0x3ac0, 0x3b80,
0xfb41, 0x3900, 0xf9c1, 0xf881, 0x3840, 0x2800,
0xe8c1, 0xe981, 0x2940, 0xeb01, 0x2bc0, 0x2a80, 0xea41, 0xee01,
0x2ec0, 0x2f80, 0xef41, 0x2d00, 0xedc1, 0xec81, 0x2c40, 0xe401,
0x24c0, 0x2580, 0xe541, 0x2700, 0xe7c1, 0xe681, 0x2640, 0x2200,
0xe2c1, 0xe381, 0x2340, 0xe101, 0x21c0, 0x2080, 0xe041, 0xa001,
0x60c0, 0x6180, 0xa141, 0x6300, 0xa3c1, 0xa281, 0x6240, 0x6600,
0xa6c1, 0xa781, 0x6740, 0xa501, 0x65c0, 0x6480, 0xa441, 0x6c00,
0xacc1, 0xad81, 0x6d40, 0xaf01, 0x6fc0, 0x6e80, 0xae41, 0xaa01,
0x6ac0, 0x6b80, 0xab41, 0x6900, 0xa9c1, 0xa881, 0x6840, 0x7800,
0xb8c1, 0xb981, 0x7940, 0xbb01, 0x7bc0, 0x7a80, 0xba41, 0xbe01,
0x7ec0, 0x7f80, 0xbf41, 0x7d00, 0xbdc1, 0xbc81, 0x7c40, 0xb401,
0x74c0, 0x7580, 0xb541, 0x7700, 0xb7c1, 0xb681, 0x7640, 0x7200,
0xb2c1, 0xb381, 0x7340, 0xb101, 0x71c0, 0x7080, 0xb041, 0x5000,
0x90c1, 0x9181, 0x5140, 0x9301, 0x53c0, 0x5280, 0x9241, 0x9601,
0x56c0, 0x5780, 0x9741, 0x5500, 0x95c1, 0x9481, 0x5440, 0x9c01,
0x5cc0, 0x5d80, 0x9d41, 0x5f00, 0x9fc1, 0x9e81, 0x5e40, 0x5a00,
0x9ac1, 0x9b81, 0x5b40, 0x9901, 0x59c0, 0x5880, 0x9841, 0x8801,
0x48c0, 0x4980, 0x8941, 0x4b00, 0x8bc1, 0x8a81, 0x4a40, 0x4e00,
0x8ec1, 0x8f81, 0x4f40, 0x8d01, 0x4dc0, 0x4c80, 0x8c41, 0x4400,
0x84c1, 0x8581, 0x4540, 0x8701, 0x47c0, 0x4680, 0x8641, 0x8201,
0x42c0, 0x4380, 0x8341, 0x4100, 0x81c1, 0x8081, 0x4040};
int BytesToRead;
byte[] BytesRead = new byte[256];
private System.Collections.ObjectModel.Collection ReceivedDataPacket = new System.Collections.ObjectModel.Collection();
private void serialPort1_DataReceived(object sender, System.IO.Ports.SerialDataReceivedEventArgs e)
{
BytesToRead = serialPort1.BytesToRead;
serialPort1.Read(BytesRead, 0, BytesToRead);
this.Invoke(new EventHandler(ReadUpdate));
}
public void ReadUpdate(object sender, System.EventArgs e)
{
for (int i = 0; i <= BytesToRead - 1; i += 1)
{
ReceivedDataPacket.Add(BytesRead[i]);
}
if (ReceivedDataPacket.Count == CommandRead[9] + 14)
{
byte[] ACKSequence = { 16, 6 };
if (serialPort1.IsOpen) serialPort1.Write(ACKSequence, 0, 2);
byte totalcrc = (byte)(ReceivedDataPacket.Count - 9);
byte[] dataforcrc = new byte[totalcrc + 1];
for (int i = 0; i <= totalcrc; i += 1)
{
dataforcrc[i] = ReceivedDataPacket[4 + i];
}
int CheckSumCalc;
CheckSumCalc = CalculateCRC16(dataforcrc);
byte crclow = 0;
byte crchigh = 0;
crclow = (byte)(CheckSumCalc & 255);
crchigh = (byte)(CheckSumCalc >> 8);
if (ReceivedDataPacket[ReceivedDataPacket.Count - 2] == crclow & ReceivedDataPacket[ReceivedDataPacket.Count - 1] == crchigh)
{
value = (ReceivedDataPacket[11] * 256) + ReceivedDataPacket[10];
if ((value & 1) == 1) label1.BackColor = Color.Orange; else label1.BackColor = Color.White;
if ((value & 2) == 2) label2.BackColor = Color.Orange; else label2.BackColor = Color.White;
if ((value & 4) == 4) label3.BackColor = Color.Orange; else label3.BackColor = Color.White;
if ((value & 8) == 8) label4.BackColor = Color.Orange; else label4.BackColor = Color.White;
if ((value & 16) == 16) label5.BackColor = Color.Orange; else label5.BackColor = Color.White;
if ((value & 32) == 32) label6.BackColor = Color.Orange; else label6.BackColor = Color.White;
if ((value & 64) == 64) label7.BackColor = Color.Orange; else label7.BackColor = Color.White;
if ((value & 128) == 128) label8.BackColor = Color.Orange; else label8.BackColor = Color.White;
}
}
}
private void timer1_Tick(object sender, EventArgs e)
{
ReceivedDataPacket.Clear();
ReadN7(0,1);
}
private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
if (serialPort1.IsOpen) serialPort1.Close();
}
}
}
Download Project File for C#, click here
PortName in C# with your serial port number.
Download Ladder Programming for Allen-Bradley Micrologic 1000, click here
Video about Read data From Allen-Bradley MicroLogix 1000
Microsoft visual c# code for Read Data from Allen-Bradley PLC :
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace DF1Read
{
public partial class Form1 : Form
{
int OrderIncrement = new Random().Next(1, 127);
private byte[] CommandRead = new byte[17];
int value;
public Form1()
{
InitializeComponent();
}
public void ReadN7(byte StartingElementNumber, int numberOfRead)
{
if (numberOfRead < 1)
return;
if (!serialPort1.IsOpen)
serialPort1.Open();
if (OrderIncrement < 65535)
{
OrderIncrement += 1;
}
else
{
OrderIncrement = 1;
}
CommandRead[0] = 16;
CommandRead[1] = 2;
CommandRead[2] = 0;
CommandRead[3] = 0;
CommandRead[4] = 0xf;
CommandRead[5] = 0;
CommandRead[6] = (byte)(OrderIncrement & 255);
CommandRead[7] = (byte)(OrderIncrement >> 8);
CommandRead[8] = 0xa1;
//* Number of bytes to read -
CommandRead[9] = (byte)(numberOfRead * 2);
//* File Number
CommandRead[10] = 7;
//* File Type
CommandRead[11] = 137;
//N
//Starting Element Number
CommandRead[12] = StartingElementNumber;
byte[] dataforcrc = new byte[11];
for (int i = 0; i <= 10; i += 1)
{
dataforcrc[i] = CommandRead[2 + i];
}
int CheckSumCalc;
CheckSumCalc = CalculateCRC16(dataforcrc);
CommandRead[13] = 16;
CommandRead[14] = 3;
CommandRead[15] = (byte)(CheckSumCalc & 255);
CommandRead[16] = (byte)(CheckSumCalc >> 8);
byte[] ACKSequence = {16,6};
if (serialPort1.IsOpen)
{
serialPort1.Write(ACKSequence, 0, 2);
serialPort1.Write(CommandRead, 0, CommandRead.Length);
}
}
private int CalculateCRC16(byte[] DataInput)
{
int iCRC = 0;
byte bytT = 0;
for (int i = 0; i <= DataInput.Length - 1; i++)
{
bytT = (byte)((iCRC & 0xff) ^ DataInput[i]);
iCRC = (int)((iCRC >> 8) ^ CRC16table[bytT]);
}
bytT = (byte)((iCRC & 0xff) ^ 3);
iCRC = (int)((iCRC >> 8) ^ CRC16table[bytT]);
return iCRC;
}
int[] CRC16table = {0x0,0xc0c1,0xc181,0x140,0xc301,0x3c0,0x280, 0xc241,
0xc601, 0x6c0, 0x780, 0xc741, 0x500, 0xc5c1, 0xc481, 0x440,
0xcc01, 0xcc0, 0xd80, 0xcd41, 0xf00, 0xcfc1, 0xce81, 0xe40,
0xa00, 0xcac1, 0xcb81, 0xb40, 0xc901, 0x9c0, 0x880,
0xc841, 0xd801, 0x18c0, 0x1980, 0xd941, 0x1b00, 0xdbc1, 0xda81,
0x1a40, 0x1e00, 0xdec1, 0xdf81, 0x1f40,
0xdd01, 0x1dc0, 0x1c80, 0xdc41, 0x1400, 0xd4c1, 0xd581, 0x1540,
0xd701, 0x17c0, 0x1680, 0xd641, 0xd201, 0x12c0, 0x1380, 0xd341,
0x1100, 0xd1c1, 0xd081, 0x1040, 0xf001, 0x30c0, 0x3180, 0xf141,
0x3300, 0xf3c1, 0xf281, 0x3240, 0x3600, 0xf6c1, 0xf781, 0x3740,
0xf501, 0x35c0, 0x3480, 0xf441, 0x3c00, 0xfcc1, 0xfd81,
0x3d40, 0xff01, 0x3fc0, 0x3e80, 0xfe41, 0xfa01, 0x3ac0, 0x3b80,
0xfb41, 0x3900, 0xf9c1, 0xf881, 0x3840, 0x2800,
0xe8c1, 0xe981, 0x2940, 0xeb01, 0x2bc0, 0x2a80, 0xea41, 0xee01,
0x2ec0, 0x2f80, 0xef41, 0x2d00, 0xedc1, 0xec81, 0x2c40, 0xe401,
0x24c0, 0x2580, 0xe541, 0x2700, 0xe7c1, 0xe681, 0x2640, 0x2200,
0xe2c1, 0xe381, 0x2340, 0xe101, 0x21c0, 0x2080, 0xe041, 0xa001,
0x60c0, 0x6180, 0xa141, 0x6300, 0xa3c1, 0xa281, 0x6240, 0x6600,
0xa6c1, 0xa781, 0x6740, 0xa501, 0x65c0, 0x6480, 0xa441, 0x6c00,
0xacc1, 0xad81, 0x6d40, 0xaf01, 0x6fc0, 0x6e80, 0xae41, 0xaa01,
0x6ac0, 0x6b80, 0xab41, 0x6900, 0xa9c1, 0xa881, 0x6840, 0x7800,
0xb8c1, 0xb981, 0x7940, 0xbb01, 0x7bc0, 0x7a80, 0xba41, 0xbe01,
0x7ec0, 0x7f80, 0xbf41, 0x7d00, 0xbdc1, 0xbc81, 0x7c40, 0xb401,
0x74c0, 0x7580, 0xb541, 0x7700, 0xb7c1, 0xb681, 0x7640, 0x7200,
0xb2c1, 0xb381, 0x7340, 0xb101, 0x71c0, 0x7080, 0xb041, 0x5000,
0x90c1, 0x9181, 0x5140, 0x9301, 0x53c0, 0x5280, 0x9241, 0x9601,
0x56c0, 0x5780, 0x9741, 0x5500, 0x95c1, 0x9481, 0x5440, 0x9c01,
0x5cc0, 0x5d80, 0x9d41, 0x5f00, 0x9fc1, 0x9e81, 0x5e40, 0x5a00,
0x9ac1, 0x9b81, 0x5b40, 0x9901, 0x59c0, 0x5880, 0x9841, 0x8801,
0x48c0, 0x4980, 0x8941, 0x4b00, 0x8bc1, 0x8a81, 0x4a40, 0x4e00,
0x8ec1, 0x8f81, 0x4f40, 0x8d01, 0x4dc0, 0x4c80, 0x8c41, 0x4400,
0x84c1, 0x8581, 0x4540, 0x8701, 0x47c0, 0x4680, 0x8641, 0x8201,
0x42c0, 0x4380, 0x8341, 0x4100, 0x81c1, 0x8081, 0x4040};
int BytesToRead;
byte[] BytesRead = new byte[256];
private System.Collections.ObjectModel.Collection
private void serialPort1_DataReceived(object sender, System.IO.Ports.SerialDataReceivedEventArgs e)
{
BytesToRead = serialPort1.BytesToRead;
serialPort1.Read(BytesRead, 0, BytesToRead);
this.Invoke(new EventHandler(ReadUpdate));
}
public void ReadUpdate(object sender, System.EventArgs e)
{
for (int i = 0; i <= BytesToRead - 1; i += 1)
{
ReceivedDataPacket.Add(BytesRead[i]);
}
if (ReceivedDataPacket.Count == CommandRead[9] + 14)
{
byte[] ACKSequence = { 16, 6 };
if (serialPort1.IsOpen) serialPort1.Write(ACKSequence, 0, 2);
byte totalcrc = (byte)(ReceivedDataPacket.Count - 9);
byte[] dataforcrc = new byte[totalcrc + 1];
for (int i = 0; i <= totalcrc; i += 1)
{
dataforcrc[i] = ReceivedDataPacket[4 + i];
}
int CheckSumCalc;
CheckSumCalc = CalculateCRC16(dataforcrc);
byte crclow = 0;
byte crchigh = 0;
crclow = (byte)(CheckSumCalc & 255);
crchigh = (byte)(CheckSumCalc >> 8);
if (ReceivedDataPacket[ReceivedDataPacket.Count - 2] == crclow & ReceivedDataPacket[ReceivedDataPacket.Count - 1] == crchigh)
{
value = (ReceivedDataPacket[11] * 256) + ReceivedDataPacket[10];
if ((value & 1) == 1) label1.BackColor = Color.Orange; else label1.BackColor = Color.White;
if ((value & 2) == 2) label2.BackColor = Color.Orange; else label2.BackColor = Color.White;
if ((value & 4) == 4) label3.BackColor = Color.Orange; else label3.BackColor = Color.White;
if ((value & 8) == 8) label4.BackColor = Color.Orange; else label4.BackColor = Color.White;
if ((value & 16) == 16) label5.BackColor = Color.Orange; else label5.BackColor = Color.White;
if ((value & 32) == 32) label6.BackColor = Color.Orange; else label6.BackColor = Color.White;
if ((value & 64) == 64) label7.BackColor = Color.Orange; else label7.BackColor = Color.White;
if ((value & 128) == 128) label8.BackColor = Color.Orange; else label8.BackColor = Color.White;
}
}
}
private void timer1_Tick(object sender, EventArgs e)
{
ReceivedDataPacket.Clear();
ReadN7(0,1);
}
private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
if (serialPort1.IsOpen) serialPort1.Close();
}
}
}
Labels:
Allen Bradley PLC
Allen-Bradley MicroLogix
Allen-Bradley PLC
MicroLogix 1000
PLC Application
Read Data
Allen Bradley PLC
Allen-Bradley MicroLogix
Allen-Bradley PLC
MicroLogix 1000
PLC Application
Read Data