172 lines
5.5 KiB
Python
172 lines
5.5 KiB
Python
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#!/usr/bin/env python3
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"""
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简单的OPC UA服务器示例
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用于工业自动化数据通信
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"""
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from opcua import Server, ua
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import time
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import random
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import threading
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from datetime import datetime
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from core.system import SystemState
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class SimpleOPCUAServer:
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def __init__(self, state, endpoint="opc.tcp://0.0.0.0:4840/zjsh_feed/server/", name="Feed_Server"):
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"""
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初始化OPC UA服务器
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Args:
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endpoint: 服务器端点地址
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name: 服务器名称
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"""
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self.server = Server()
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self.server.set_endpoint(endpoint)
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self.server.set_server_name(name)
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self.state = state
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# 设置服务器命名空间
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self.namespace = self.server.register_namespace("Feed_Control_System")
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# 获取对象节点
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self.objects = self.server.get_objects_node()
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# 创建自定义对象
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self.create_object_structure()
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# 运行标志
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self.running = False
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def create_object_structure(self):
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"""创建OPC UA对象结构"""
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# 创建上料斗对象
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self.upper = self.objects.add_object(self.namespace, "upper")
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self.lower=self.objects.add_object(self.namespace, "lower")
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self.sys=self.objects.add_object(self.namespace, "sys")
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# 创建变量
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self.create_variables()
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def create_variables(self):
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"""创建OPC UA变量"""
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# 上料斗重量变量
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self.upper_weight = self.upper.add_variable(self.namespace, "upper_weight", 0.0)
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self.lower_weight = self.lower.add_variable(self.namespace, "lower_weight", 0.0)
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# 设置变量为可写
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self.upper_weight.set_writable()
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self.lower_weight.set_writable()
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def setup_state_listeners(self):
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"""设置状态监听器 - 事件驱动更新"""
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if hasattr(self.state, 'state_updated'):
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self.state.state_updated.connect(self.on_state_changed)
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print("状态监听器已设置 - 事件驱动模式")
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def on_state_changed(self, property_name, value):
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"""状态变化时的回调函数"""
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try:
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# 根据属性名更新对应的OPC UA变量
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if property_name == "upper_weight":
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self.upper_weight.set_value(value)
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elif property_name == "lower_weight":
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self.lower_weight.set_value(value)
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# 可以在这里添加更多状态映射
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print(f"状态更新: {property_name} = {value}")
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except Exception as e:
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print(f"状态更新错误: {e}")
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def start(self):
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"""启动服务器"""
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try:
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self.server.start()
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self.running = True
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print(f"OPC UA服务器启动成功!")
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print(f"服务器端点: opc.tcp://0.0.0.0:4840/freeopcua/server/")
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print(f"命名空间: {self.namespace}")
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# 初始化当前值
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if self.state:
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self.upper_weight.set_value(self.state._upper_weight)
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self.lower_weight.set_value(self.state._lower_weight)
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print("已同步初始状态值")
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# 设置状态监听器 - 关键步骤！
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self.setup_state_listeners()
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# # 只有在没有状态系统时才使用模拟线程
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# if not self.state:
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# print("使用模拟数据模式")
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# self.simulation_thread = threading.Thread(target=self.simulate_data)
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# self.simulation_thread.daemon = True
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# self.simulation_thread.start()
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except Exception as e:
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print(f"启动服务器失败: {e}")
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def stop(self):
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"""停止服务器"""
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self.running = False
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if hasattr(self, 'simulation_thread'):
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self.simulation_thread.join(timeout=2)
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self.server.stop()
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print("OPC UA服务器已停止")
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# 断开状态监听器
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if hasattr(self.state, 'state_updated'):
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try:
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self.state.state_updated.disconnect(self.on_state_changed)
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except:
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pass
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def simulate_data(self):
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"""模拟数据更新"""
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while self.running:
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try:
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# 更新变量值
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self.upper_weight.set_value(self.state.upper_weight)
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self.lower_weight.set_value(self.state.lower_weight)
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# 模拟延迟
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time.sleep(1)
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except Exception as e:
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print(f"数据更新错误: {e}")
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continue
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def main():
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"""主函数"""
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# 创建系统状态实例
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state = SystemState()
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# 创建并启动服务器
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server = SimpleOPCUAServer(
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state=state,
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endpoint="opc.tcp://0.0.0.0:4840/freeopcua/server/",
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name="工业自动化 OPC UA 服务器"
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)
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try:
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server.start()
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print("服务器正在运行，按 Ctrl+C 停止...")
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# 保持服务器运行
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while True:
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time.sleep(1)
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except KeyboardInterrupt:
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print("\n正在停止服务器...")
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server.stop()
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except Exception as e:
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print(f"服务器运行错误: {e}")
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server.stop()
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if __name__ == "__main__":
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main()
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