private void userButton2_Click(object sender, EventArgs e)
{
// D100-D104读取
OperateResult <byte[]> read = melsec_net.ReadFromPLC(MelsecDataType.D, 100, 5);
if (read.IsSuccess)
{
// 成功读取，提取各自的值，此处的值有个前提假设，假设PLC上的数据是有符号的数据，表示-32768-32767
short D100 = melsec_net.GetShortFromBytes(read.Content, 0);
short D101 = melsec_net.GetShortFromBytes(read.Content, 1);
short D102 = melsec_net.GetShortFromBytes(read.Content, 2);
short D103 = melsec_net.GetShortFromBytes(read.Content, 3);
short D104 = melsec_net.GetShortFromBytes(read.Content, 4);
TextBoxAppendStringLine("D100:" + D100);
TextBoxAppendStringLine("D101:" + D101);
TextBoxAppendStringLine("D102:" + D102);
TextBoxAppendStringLine("D103:" + D103);
TextBoxAppendStringLine("D104:" + D104);
//================================================================================
//这两种方式一样的，如果是无符号的，则使用 ushort D100 = BitConverter.ToUInt16(read.Content, 0);//0-65535
//short D100 = BitConverter.ToInt16(read.Content, 0);
//short D101 = BitConverter.ToInt16(read.Content, 2);
//short D102 = BitConverter.ToInt16(read.Content, 4);
//short D103 = BitConverter.ToInt16(read.Content, 6);
//short D104 = BitConverter.ToInt16(read.Content, 8);
}
else
{
//失败读取
MessageBox.Show(read.ToMessageShowString());
}
}