Data access S7 is a library to connect to S7 plcs for reading and writing data.
PM> Install-Package Dacs7
Dacs7 is used to connect to a SIEMENS Plc by using the RFC1006 protocol to perform operations.
//create an instance of the client
var client = new Dacs7Client("127.0.0.1:102,0,2");
//connect to the plc. If the connection could not be established
//you will get an exception here.
await client.ConnectAsync();
//Check if the client is connected. If yes, than close the connection.
if(client.IsConnected)
await client.DisconnectAsync();
This kind of methods are the low level methods for communicate with the PLC.
var testData1 = new byte[100];
var testData2 = new byte[500];
//Write an array of bytes to the PLC. Syntax = Area.Offset,DataType[,length]
await _client.WriteAsync(KeyValuePair.Create<string, object>("DB1114.0,b,100", testData1), KeyValuePair.Create<string, object>("DB1114.100,b,500", testData2));
//Read an array of bytes from the PLC. Syntax = Area.Offset,DataType[,length]
var readResult = await _client.ReadAsync("DB1114.0,b,100", "DB1114.100,b,500");
var readResults = await client.ReadAsync(ReadItem.Create<bool>(datablock, baseOffset),
ReadItem.Create<bool>(datablock, baseOffset + 5))
await client.WriteAsync(WriteItem.Create(datablock, baseOffset, true),
WriteItem.Create(datablock, baseOffset + 5, true))
This kind of functions are the higher level methods. By using this you write and read the data direct by using the .Net type system.
var testData1 = new byte[100];
var testData2 = new byte[500];
//Write an array of bytes to the PLC.
await _client.WriteAsync(WriteItem.Create<byte[]>("DB1114", 0, testData1), WriteItem.Create<byte[]>("DB1114", 100, testData2));
//Read an array of bytes from the PLC.
var readResult = await _client.ReadAsync(ReadItem.Create<byte[]>("DB1114", 0, 100), ReadItem.Create<byte[]>"DB1114", 100, 500);
300 | 400 | WinAC | 1200 | 1500 | |
---|---|---|---|---|---|
DB Read/Write | X | X | X | X | X |
EB Read/Write | X | X | X | X | X |
AB Read/Write | X | X | X | X | X |
MB Read/Write | X | X | X | X | X |
TM Read/Write | X | X | X | ||
CT Read/Write | X | X | X |
Select the DB in the left pane under 'Program blocks' and click 'Properties' in the context menu.
Select the CPU in the left pane and click 'Properties' in the context menu and go to 'Protection & Security'.
Select the CPU in the left pane and click 'Properties' in the context menu and go to 'Protection & Security/Connection mechanisms'.