public bool WriteItems(Tag tag, object value)
{
lock (this)
{
try
{
if (!IsConnected())
{
return(false);
}
if (tag.TagType == "string") //在创建TagType时已经转为小写
{
var pLcAddress = DbAddress[tag.Address];
var strValue = value.ToString();
var strlen = (byte)strValue.Length;
var valueByte = new byte[strlen + 1];
var strbyte = Encoding.ASCII.GetBytes(strValue);
if (strbyte.Length != strlen)
{
throw new InvalidOperationException("写入" + tag.Address + "出错,解析的字符串长度与GetBytes数组长度不一致!");
}
if (strlen > pLcAddress.BitOffset)
{
throw new InvalidOperationException("写入" + tag.Address + "出错,输入的字符串的长度过长!");
}
valueByte[0] = strlen;
strbyte.CopyTo(valueByte, 1);
_plc.Write(DataType.DataBlock, pLcAddress.DBBlockID, pLcAddress.Offset + 1,
valueByte);
/*if (result != ErrorCode.NoError)
* throw new InvalidOperationException(result + "\n" + "Tag: " + tag.Address);*/
return(true);
}
//2020/6/11 ByteArray
if (tag.TagType == "bytearray") //在创建TagType时已经转为小写
{
var pLcAddress = DbAddress[tag.Address];
var strValue = value.ToString();
var strlen = strValue.Length;
var valueByte = new byte[strlen];
var strbyte = Encoding.ASCII.GetBytes(strValue);
if (strbyte.Length != strlen)
{
throw new InvalidOperationException("写入" + tag.Address + "出错,解析的字符串长度与GetBytes数组长度不一致!");
}
if (strlen != pLcAddress.BitOffset)
{
throw new InvalidOperationException("写入" + tag.Address + "出错,输入的字符串长度与定义长度不匹配!");
}
strbyte.CopyTo(valueByte, 0);
_plc.WriteBytes(DataType.DataBlock, pLcAddress.DBBlockID, pLcAddress.Offset,
valueByte);
/*if (result != ErrorCode.NoError)
* throw new InvalidOperationException(result + "\n" + "Tag: " + tag.Address);*/
return(true);
}
else
{
switch (value)
{
case double d:
{
var bytes = Double.ToByteArray(d);
value = DWord.FromByteArray(bytes);
break;
}
case bool b:
value = b ? 1 : 0;
break;
}
_plc.Write(tag.Address, value);
/*if (result != ErrorCode.NoError)
* throw new InvalidOperationException(result + "\n" + "Tag: " + tag.Address);*/
return(true);
}
}
catch (Exception ex)
{
//LOG.Error(string.Format("S7 Driver写入地址{0},值{1},出错{2}", tag.Address, value,ex));
Log.Error($"S7 Driver writes address:{tag.Address}, value:{value}, Message:{ex}");
return(false);
}
}
}