121 lines
3.3 KiB
C#
121 lines
3.3 KiB
C#
using System;
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using System.Xml;
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using Aitex.Core.RT.Event;
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using Aitex.Core.RT.IOCore;
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using Aitex.Core.Util;
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namespace Aitex.Core.RT.Device.Unit
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{
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/// <summary>
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/// 心跳包机制
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///
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/// 功能：
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/// 1.C#送出给PLC，如果PLC检测到C#心跳信号停止，则判定C#程序运行异常，从而触发安全逻辑动作.
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/// 2.C#检测PLC返回的心跳包信号，如果检测到PLC心跳信号停止，则判定PLC程序运行异常，从而进行报警处理.
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/// </summary>
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public class IoHeartbeat : BaseDevice, IDevice
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{
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public float Feedback
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{
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get
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{
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return _isFloatAioType ? _ai.FloatValue : _ai.Value;
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}
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}
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public float SetPoint
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{
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get
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{
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return _isFloatAioType ? _ao.FloatValue : _ao.Value;
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}
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set
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{
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if (_isFloatAioType)
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_ao.FloatValue = value;
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else
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{
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_ao.Value = (short)value;
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}
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}
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}
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private int PLC_Heart_Beat_Timeout_ms = 1000* 120;
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//IO
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private AIAccessor _ai = null;
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private AOAccessor _ao = null;
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private DeviceTimer _updateTimer = new DeviceTimer(); //更新 AO信号 给PLC
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private int MAX = 0x7FFF;
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private float _prevAiValue = 0;
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private DeviceTimer _connectTimer = new DeviceTimer();
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private R_TRIG _trigConnectionLost = new R_TRIG();
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private bool _isFloatAioType = false;
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public IoHeartbeat(string module, XmlElement node, string ioModule = "")
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{
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base.Module = module;
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base.Name = node.GetAttribute("id");
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base.Display = node.GetAttribute("display");
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base.DeviceID = node.GetAttribute("schematicId");
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_ai = ParseAiNode("ai", node, ioModule);
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_ao = ParseAoNode("ao", node, ioModule);
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_isFloatAioType = !string.IsNullOrEmpty(node.GetAttribute("aioType")) && (node.GetAttribute("aioType") == "float");
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}
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public bool Initialize()
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{
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_updateTimer.Start(500);
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_connectTimer.Start(PLC_Heart_Beat_Timeout_ms);
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return true;
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}
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public void Terminate()
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{
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}
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public void Monitor()
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{
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if (Math.Abs(_prevAiValue - Feedback) > 0.01)
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{
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_connectTimer.Start(PLC_Heart_Beat_Timeout_ms);
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}
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_trigConnectionLost.CLK = _connectTimer.IsTimeout();
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if (_trigConnectionLost.Q)
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{
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EV.PostAlarmLog(Module, $"PLC heartbeat check failed");
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}
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_prevAiValue = Feedback;
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//如果计时到达，则翻转心跳信号
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if (_updateTimer.IsTimeout())
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{
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int value = (int)SetPoint;
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value++;
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if (value >= MAX)
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{
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value = 0;
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}
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SetPoint = value;
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_updateTimer.Start(500); //500 ms
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}
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}
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public void Reset()
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{
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_connectTimer.Start(PLC_Heart_Beat_Timeout_ms);
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_trigConnectionLost.RST = true;
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}
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}
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}
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