C#和西门子S7与Sharp7库的通信- GetAgBlockInfo参数？

Question

对于此函数：

public int GetAgBlockInfo(int BlockType, int BlockNumber, ref S7BlockInfo Block);

如果我想使用此fc读取DB，BlockType的参数是什么？我试过了: S7Consts.S7AreaDB，132，0x41，65

Answer 1

如果你想读取任何数据块，你可以使用DBRead方法。

首先配置您的设备和数据块：https://github.com/fbarresi/Sharp7/blob/master/README.md

然后你可以像这样读取数据块：

var _s7Client = new S7Client();
int connectionResult = _s7Client.ConnectTo("192.168.0.1",0,1);//write your PLC IP address
if(connectionResult == 0)
{
    var buffer = new byte[6];
    int readResult = _s7Client.DBRead(1, 0, buffer.Length, buffer); //parameters: dbNumber, startingAddress, readLength, buffer

    if(readResult == 0)
    {
        byte x = S7.GetByteAt(buffer,0); //parameters: buffer, position
        string y = S7.GetCharsAt(buffer, 2, 4); //parameters: buffer, position, length(byte)
    }
    else
    {
        //read error
    }
}
else
{
    //connection error
}