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https://github.com/OPCFoundation/UA-.NETStandard.git
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91 lines
3.1 KiB
C#
91 lines
3.1 KiB
C#
/* ========================================================================
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* Copyright (c) 2005-2016 The OPC Foundation, Inc. All rights reserved.
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*
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* OPC Foundation MIT License 1.00
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use,
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* copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following
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* conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* The complete license agreement can be found here:
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* http://opcfoundation.org/License/MIT/1.00/
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* ======================================================================*/
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using System;
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using System.Collections;
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using System.Collections.Generic;
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using System.Text;
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using System.Xml;
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using System.IO;
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using System.Runtime.Serialization;
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using System.Reflection;
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using System.Threading;
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using Opc.Ua;
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using Opc.Ua.Server;
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namespace Boiler
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{
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/// <summary>
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/// A object representing a generic controller.
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/// </summary>
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public partial class GenericControllerState
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{
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#region Public Interface
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/// <summary>
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/// Updates the measurement and calculates the new control output.
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/// </summary>
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public double UpdateMeasurement(AnalogItemState<double> source)
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{
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Range range = source.EURange.Value;
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m_measurement.Value = source.Value;
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// clamp the setpoint.
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if (range != null)
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{
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if (m_setPoint.Value > range.High)
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{
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m_setPoint.Value = range.High;
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}
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if (m_setPoint.Value < range.Low)
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{
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m_setPoint.Value = range.Low;
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}
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}
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// calculate error.
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m_controlOut.Value = m_setPoint.Value - m_measurement.Value;
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if (range != null)
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{
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m_controlOut.Value /= range.Magnitude;
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if (Math.Abs(m_controlOut.Value) > 1.0)
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{
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m_controlOut.Value = (m_controlOut.Value < 0)?-1.0:+1.0;
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}
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}
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// return the new output.
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return m_controlOut.Value;
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}
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#endregion
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}
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}
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