/// <summary>
/// 连接到PLC
/// </summary>
/// <returns></returns>
private bool Connect()
{
int iConnected = 0;
try
{
lock (_lockObjet)
{
iConnected =
CS7TcpClient.ConnectPlc(
plcHandle,
Encoding.Default.GetBytes(IPAddress),
Rack,
Slot,
false,
0,
0);
}
if (iConnected == 0)
{
return(true);
}
else
{
_log.Error($"ErrCode={iConnected}|ErrText={GetErrorMessage(iConnected)}");
return(false);
}
}
catch (Exception error)
{
_log.Error(error.Message, error);
return(false);
}
}
/// <summary>
/// 构造方法
/// </summary>
/// <param name="ipAddress">PLC的IP地址</param>
/// <param name="rack">PLC的机架号</param>
/// <param name="slot">PLC的插槽号</param>
public BS7SiemensPLCConnection(string ipAddress, int rack, int slot)
{
_log = Logger.Get <BS7SiemensPLCConnection>();
IPAddress = ipAddress;
Rack = rack;
Slot = slot;
plcHandle = CS7TcpClient.CreatePlc();
isConnected = Connect();
}
/// <summary>
/// 根据错误代码获取错误提示文本
/// </summary>
/// <param name="errCode">错误代码</param>
private string GetErrorMessage(int errCode)
{
byte[] errText = new byte[1024];
int resNo = CS7TcpClient.GetErrorMsg(errCode, errText, errText.Length);
if (resNo == 0)
{
return(Encoding.Default.GetString(errText));
}
else
{
return($"ResNo={resNo}");
}
}
/// <summary>
/// 断开连接
/// </summary>
private void Disconnect()
{
try
{
int resNo = CS7TcpClient.DisconnectPlc(plcHandle);
if (resNo != 0)
{
_log.Error($"ErrCode={resNo}|ErrText={GetErrorMessage(resNo)}");
}
}
catch (Exception error)
{
_log.Error(error.Message, error);
}
}
/// <summary>
/// 读取数据块内容
/// </summary>
/// <param name="dbType">数据块类别标识</param>
/// <param name="dbNumber">DB数据块编号</param>
/// <param name="dbOffset">读取的起始偏移量</param>
/// <param name="bufferLength">缓冲区长度</param>
/// <param name="buffer">byte[]类型的缓冲区</param>
/// <param name="errText">执行结果信息</param>
public int ReadBlock(
SiemensRegisterType dbType,
int dbNumber,
int dbOffset,
int bufferLength,
ref byte[] buffer,
out string errText)
{
if (!isConnected)
{
isConnected = Connect();
}
buffer = new byte[bufferLength];
int resNo = 0;
lock (_lockObjet)
{
resNo =
CS7TcpClient.ReadBlockAsByte(
plcHandle,
(int)dbType,
dbNumber,
dbOffset,
bufferLength,
buffer);
}
if (resNo != 0)
{
errText = GetErrorMessage(resNo);
_log.Error(
$"PLC:[{IPAddress}]读取[{dbType}]" +
$"[{dbNumber}]失败，失败信息：" +
$"[Code:{resNo},Message:{errText}");
}
else
{
errText = "读取正常";
}
return(resNo);
}
/// <summary>
/// 将值回写到PLC中
/// </summary>
/// <param name="dbType">数据块类别</param>
/// <param name="dbNumber">DB数据块编号</param>
/// <param name="tag">西门子Tag对象</param>
public void WriteToPLC(
SiemensRegisterType dbType,
int dbNumber,
SiemensTag tag)
{
if (!isConnected)
{
isConnected = Connect();
}
int rlt = 0;
try
{
lock (_lockObjet)
{
if (tag is SiemensBoolOfTag)
{
SiemensBoolOfTag ltag = tag as SiemensBoolOfTag;
rlt = CS7TcpClient.WriteBool(
plcHandle,
(int)dbType,
dbNumber,
ltag.DB_Offset,
ltag.Position,
ltag.Value);
if (!ltag.Name.Contains("MES_Heart_Beat"))
{
_log.Debug(
$"PLC:[{IPAddress}]:数据块[{dbNumber}]:Tag[{tag.Name}]:" +
$"Offset:[{tag.DB_Offset}]，待写入:[{ltag.Value}]");
}
}
else if (tag is SiemensByteOfTag)
{
SiemensByteOfTag ltag = tag as SiemensByteOfTag;
rlt = CS7TcpClient.WriteByte(
plcHandle,
(int)dbType,
dbNumber,
ltag.DB_Offset,
ltag.Value);
_log.Debug(
$"PLC:[{IPAddress}]:数据块[{dbNumber}]:Tag[{tag.Name}]:" +
$"Offset:[{tag.DB_Offset}]，待写入:[{ltag.Value}]");
}
else if (tag is SiemensWordOfTag)
{
SiemensWordOfTag ltag = tag as SiemensWordOfTag;
rlt = CS7TcpClient.WriteWord(
plcHandle,
(int)dbType,
dbNumber,
ltag.DB_Offset,
ltag.Value);
_log.Debug(
$"PLC:[{IPAddress}]:数据块[{dbNumber}]:Tag[{tag.Name}]:" +
$"Offset:[{tag.DB_Offset}]，待写入:[{ltag.Value}]");
}
else if (tag is SiemensIntOfTag)
{
SiemensIntOfTag ltag = tag as SiemensIntOfTag;
rlt = CS7TcpClient.WriteInt(
plcHandle,
(int)dbType,
dbNumber,
ltag.DB_Offset,
ltag.Value);
_log.Debug(
$"PLC:[{IPAddress}]:数据块[{dbNumber}]:Tag[{tag.Name}]:" +
$"Offset:[{tag.DB_Offset}]，待写入:[{ltag.Value}]");
}
else if (tag is SiemensDWordOfTag)
{
SiemensDWordOfTag ltag = tag as SiemensDWordOfTag;
rlt = CS7TcpClient.WriteDWord(
plcHandle,
(int)dbType,
dbNumber,
ltag.DB_Offset,
ltag.Value);
_log.Debug(
$"PLC:[{IPAddress}]:数据块[{dbNumber}]:Tag[{tag.Name}]:" +
$"Offset:[{tag.DB_Offset}]，待写入:[{ltag.Value}]");
}
else if (tag is SiemensRealOfTag)
{
SiemensRealOfTag ltag = tag as SiemensRealOfTag;
rlt = CS7TcpClient.WriteFloat(
plcHandle,
(int)dbType,
dbNumber,
ltag.DB_Offset,
ltag.Value);
_log.Debug(
$"PLC:[{IPAddress}]:数据块[{dbNumber}]:Tag[{tag.Name}]:" +
$"Offset:[{tag.DB_Offset}]，待写入:[{ltag.Value}]");
}
else if (tag is SiemensArrayCharOfTag)
{
SiemensArrayCharOfTag ltag = tag as SiemensArrayCharOfTag;
rlt = CS7TcpClient.WriteString(
plcHandle,
(int)dbType,
dbNumber,
ltag.DB_Offset,
ltag.Length,
Encoding.ASCII.GetBytes(ltag.Value));
_log.Debug(
$"PLC:[{IPAddress}]:数据块[{dbNumber}]:Tag[{tag.Name}]:" +
$"Offset:[{tag.DB_Offset}]，待写入:[{ltag.Value}]");
}
}
}
catch (Exception error)
{
throw new Exception(
$"PLC:[{IPAddress}]:数据块[{dbNumber}]:Tag[{tag.Name}]:" +
$"Offset:[{tag.DB_Offset}]写入时发生错误，{error.Message}");
}
if (rlt != 0)
{
throw new Exception(
$"PLC:[{IPAddress}]:数据块[{dbNumber}]:Tag[{tag.Name}]:" +
$"Offset:[{tag.DB_Offset}]写入失败，错误提示:[{rlt}]" +
$"[{GetErrorMessage(rlt)}]");
}
}
