/// <summary> /// Returns the basic Meta data to the parameter. /// </summary> /// <param name="address">Device Address. Use null to use the DefaultDeviceAddress defined on MeComQuerySet.</param> /// <param name="parameterId">Device Parameter ID.</param> /// <param name="instance">Parameter Instance. (usually 1)</param> /// <param name="min">Minimal value. Is always a double value.</param> /// <param name="max">Maximal value. Is always a double value.</param> /// <exception cref="ComCommandException">when the command fails. Check the inner exception for details.</exception> public void GetLimits(byte?address, ushort parameterId, byte instance, out double min, out double max) { try { MeComPacket txFrame = new MeComPacket('#', address); MeComVarConvert.AddString(txFrame.Payload, "?VL"); MeComVarConvert.AddUint16(txFrame.Payload, parameterId); MeComVarConvert.AddUint8(txFrame.Payload, instance); MeComPacket rxFrame = meQuerySet.Query(txFrame); if (MeComVarConvert.ReadUint8(rxFrame.Payload) == 0) { //This is a float Value min = MeComVarConvert.ReadFloat32(rxFrame.Payload); max = MeComVarConvert.ReadFloat32(rxFrame.Payload); } else { //This is a INT32 Value min = MeComVarConvert.ReadInt32(rxFrame.Payload); max = MeComVarConvert.ReadInt32(rxFrame.Payload); } } catch (Exception Ex) { throw new ComCommandException(String.Format("Get Limit Values failed: Address: {0}; ID: {1}; Inst: {2}; Detail: {3}", address, parameterId, instance, Ex.Message), Ex); } }
/// <summary> /// Returns Meta data of the parameter. /// </summary> /// <param name="address">Device Address. Use null to use the DefaultDeviceAddress defined on MeComQuerySet.</param> /// <param name="parameterId">Device Parameter ID.</param> /// <param name="instance">Parameter Instance. (usually 1)</param> /// <returns>Returned meta data object.</returns> /// <exception cref="ComCommandException">when the command fails. Check the inner exception for details.</exception> public ParMetaData GetMetaData(byte?address, UInt16 parameterId, byte instance) { ParMetaData parMetaData = new ParMetaData(); try { MeComPacket txFrame = new MeComPacket('#', address); MeComVarConvert.AddString(txFrame.Payload, "?VM"); MeComVarConvert.AddUint16(txFrame.Payload, parameterId); MeComVarConvert.AddUint8(txFrame.Payload, instance); MeComPacket rxFrame = meQuerySet.Query(txFrame); parMetaData.Type = (MeParType)MeComVarConvert.ReadUint8(rxFrame.Payload); parMetaData.Flags = (MeParFlags)MeComVarConvert.ReadUint8(rxFrame.Payload); parMetaData.NrOfInst = MeComVarConvert.ReadUint8(rxFrame.Payload); parMetaData.MaxNrOfElements = MeComVarConvert.ReadUint32(rxFrame.Payload); switch (parMetaData.Type) { case MeParType.FLOAT32: parMetaData.Min = MeComVarConvert.ReadFloat32(rxFrame.Payload); parMetaData.Max = MeComVarConvert.ReadFloat32(rxFrame.Payload); parMetaData.Value = MeComVarConvert.ReadFloat32(rxFrame.Payload); break; case MeParType.INT32: parMetaData.Min = MeComVarConvert.ReadInt32(rxFrame.Payload); parMetaData.Max = MeComVarConvert.ReadInt32(rxFrame.Payload); parMetaData.Value = MeComVarConvert.ReadInt32(rxFrame.Payload); break; case MeParType.DOUBLE64: parMetaData.Min = MeComVarConvert.ReadDouble64(rxFrame.Payload); parMetaData.Max = MeComVarConvert.ReadDouble64(rxFrame.Payload); parMetaData.Value = MeComVarConvert.ReadDouble64(rxFrame.Payload); break; case MeParType.LATIN1: case MeParType.BYTE: parMetaData.Min = MeComVarConvert.ReadUint8(rxFrame.Payload); parMetaData.Max = MeComVarConvert.ReadUint8(rxFrame.Payload); parMetaData.Value = null; break; default: throw new ArgumentOutOfRangeException("Unknown Type received. Received value: " + parMetaData.Type); } return(parMetaData); } catch (Exception Ex) { throw new ComCommandException(String.Format("Get Meta Data failed: Address: {0}; ID: {1}; Inst: {2}; Detail: {3}", address, parameterId, instance, Ex.Message), Ex); } }
MeComPacket LocalSet(MeComPacket txFrame) { if (txFrame.Address == null) { txFrame.Address = DefaultDeviceAddress; } sequenceNr++; int trialsLeft = 3; MeComPacket rxFrame = new MeComPacket(); while (trialsLeft > 0) { trialsLeft--; txFrame.SeqNr = sequenceNr; try { meFrame.SendFrame(txFrame); if (txFrame.Address == 255) { return(rxFrame); //On the address 255, no answer is expected } rxFrame = meFrame.ReceiveFrameOrTimeout(); if (rxFrame.SeqNr == sequenceNr && rxFrame.Address == txFrame.Address) { //Corresponding Frame received if (rxFrame.RcvType == ERcvType.Data) { //Data Frame received --> Check for error code if (rxFrame.Payload.ReadByte() == '+') { SetServerErrorException(MeComVarConvert.ReadUint8(rxFrame.Payload)); } else { rxFrame.Payload.Position = 0; //Set stream position to 0 for the user return(rxFrame); } } else if (rxFrame.RcvType == ERcvType.ACK) { return(rxFrame); } } } catch (MeComPhyTimeoutException Ex) { //Ignore Timeout on this level if some trials are left if (trialsLeft == 0) { throw new GeneralException("Set failed: Timeout!", Ex); } TraceLog.Info("Thread '{0}': Package re-send. NrOfTrails {1}", Thread.CurrentThread.Name, trialsLeft); } catch (ServerException) { throw; } catch (Exception Ex) { throw new GeneralException("Set failed: " + Ex.Message, Ex); } } //Communication failed, check last error if (rxFrame.SeqNr != sequenceNr) { throw new GeneralException("Set failed: Wrong Sequence Number received. Received " + rxFrame.SeqNr + "; Expected " + sequenceNr); } if (rxFrame.Address != txFrame.Address) { throw new GeneralException("Set failed: Wrong Address received. Received " + rxFrame.Address + "; Expected " + txFrame.Address); } throw new GeneralException("Set failed: Unknown error"); }
/// <summary> /// Reads an array of FLOAT32, INT32, DOUBLE64 or ASCII (char) values form the device. /// The data length is given by the device. /// This method does only return when the device tells the host, that all data is read. /// The data is read in an loop with several sub queries. /// During this command is working, it is possible to use other commands with an different thread. /// </summary> /// <param name="address">Device Address. Use null to use the DefaultDeviceAddress defined on MeComQuerySet.</param> /// <param name="parameterId">Device Parameter ID.</param> /// <param name="instance">Parameter Instance. (usually 1)</param> /// <param name="type">Specifies the type of the value to be read.</param> /// <param name="callback">Is called every time when the progress has changed.</param> /// <param name="expectedNrOfElements">Defines the expected number of elements to calculate the progress for the callback function.</param> /// <returns>Returned value.</returns> /// <exception cref="ComCommandException">when the command fails. Check the inner exception for details.</exception> public dynamic GetBigData(byte?address, UInt16 parameterId, byte instance, MeParType type, ProgressUpdateCallback callback = null, int expectedNrOfElements = 0) { dynamic value; try { ushort rcvElements; bool hasMoreData; uint totalReadElements = 0; MemoryStream totalStream = new MemoryStream(); do { MeComPacket txFrame = new MeComPacket('#', address); MeComVarConvert.AddString(txFrame.Payload, "?VB"); MeComVarConvert.AddUint16(txFrame.Payload, parameterId); MeComVarConvert.AddUint8(txFrame.Payload, instance); MeComVarConvert.AddUint32(txFrame.Payload, totalReadElements); //Read start position MeComVarConvert.AddUint16(txFrame.Payload, UInt16.MaxValue); //Maximum Elements to read per call. MeComPacket rxFrame = meQuerySet.Query(txFrame); rcvElements = MeComVarConvert.ReadUint16(rxFrame.Payload); hasMoreData = MeComVarConvert.ReadUint8(rxFrame.Payload) == 1; totalReadElements += rcvElements; if (rcvElements > 0) { rxFrame.Payload.CopyTo(totalStream); } callback?.Invoke(100.0 / expectedNrOfElements * totalReadElements); } while (hasMoreData); totalStream.Position = 0; callback?.Invoke(100); switch (type) { case MeParType.FLOAT32: value = new float[totalReadElements]; break; case MeParType.INT32: value = new int[totalReadElements]; break; case MeParType.DOUBLE64: value = new double[totalReadElements]; break; case MeParType.LATIN1: value = ""; break; case MeParType.BYTE: value = new byte[totalReadElements]; break; default: throw new ArgumentOutOfRangeException("Unknown EParType: " + type); } for (int i = 0; i < totalReadElements; i++) { switch (type) { case MeParType.FLOAT32: value[i] = MeComVarConvert.ReadFloat32(totalStream); break; case MeParType.INT32: value[i] = MeComVarConvert.ReadInt32(totalStream); break; case MeParType.DOUBLE64: value[i] = MeComVarConvert.ReadDouble64(totalStream); break; case MeParType.LATIN1: value = MeComVarConvert.ReadEncodedString(totalStream, (int)totalReadElements); return(value); case MeParType.BYTE: value[i] = MeComVarConvert.ReadUint8(totalStream); break; default: throw new ArgumentOutOfRangeException("Unknown EParType: " + type); } } return(value); } catch (Exception Ex) { throw new ComCommandException(String.Format("Get Value failed: Address: {0}; ID: {1}; Inst: {2}; Detail: {3}", address, parameterId, instance, Ex.Message), Ex); } }
private void DecodeFrame(ref MeComPacket RxFrame, byte c, ref MemoryStream LocalRxBuf) { try { if (c == Convert.ToByte('!')) { //Start indicator LocalRxBuf = new MemoryStream(); LocalRxBuf.WriteByte(c); } else { if (c == 0x0D && (LocalRxBuf?.Length >= 11)) { //End of Frame received if (LocalRxBuf.Length == 11) { //ACK Received LocalRxBuf.Position = 7; ushort rcvCRC = MeComVarConvert.ReadUint16(LocalRxBuf); if (rcvCRC == LastCRC) { //Valid Ack received --> Extract Data LocalRxBuf.Position = 1; RxFrame.Address = MeComVarConvert.ReadUint8(LocalRxBuf); RxFrame.SeqNr = MeComVarConvert.ReadUint16(LocalRxBuf); RxFrame.RcvType = ERcvType.ACK; statistics.IncRxFrames(); } } else { //Data Frame received LocalRxBuf.Position = LocalRxBuf.Length - 4; ushort rcvCRC = MeComVarConvert.ReadUint16(LocalRxBuf); //Cut received CRC form stream and recalc CRC LocalRxBuf.SetLength(LocalRxBuf.Length - 4); ushort calcCRC = CalcCRC_CITT(LocalRxBuf); if (calcCRC == rcvCRC) { LocalRxBuf.Position = 1; RxFrame.Address = MeComVarConvert.ReadUint8(LocalRxBuf); RxFrame.SeqNr = MeComVarConvert.ReadUint16(LocalRxBuf); RxFrame.Payload = new MemoryStream(); LocalRxBuf.CopyTo(RxFrame.Payload); RxFrame.Payload.Position = 0; //Reset position for the user RxFrame.RcvType = ERcvType.Data; statistics.IncRxFrames(); } else { statistics.IncCrcErrors(); } } } else { LocalRxBuf?.WriteByte(c); } } } catch (ArgumentOutOfRangeException) { //Just ignore. They are thrown from MeComVarConvert } }