184 lines
6.3 KiB
Python
184 lines
6.3 KiB
Python
#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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"""
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节点访问诊断脚本
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帮助诊断OPC UA节点访问问题
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"""
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import sys
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import time
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# 添加项目路径
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sys.path.insert(0, r"d:\f-work\three_control_system\Feeding1129\opc")
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from opcua_client_test import OPCUAClientTest
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def diagnose_node_access():
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"""诊断节点访问问题"""
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print("=" * 60)
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print("OPC UA 节点访问诊断")
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print("=" * 60)
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# 创建客户端
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client = OPCUAClientTest()
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try:
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# 连接到服务器
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print("\n[1] 连接到OPC UA服务器...")
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if not client.connect():
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print("连接失败!")
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return
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print("连接成功!")
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# 获取对象节点
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objects = client.client.get_objects_node()
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print(f"\n对象节点: {objects}")
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print(f"对象节点ID: {objects.nodeid}")
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# 浏览所有子节点
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print("\n[2] 浏览对象节点下的所有子节点...")
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try:
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children = objects.get_children()
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print(f"子节点数量: {len(children)}")
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for i, child in enumerate(children):
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try:
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browse_name = child.get_browse_name()
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node_id = child.nodeid
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print(f" {i+1}. {browse_name} -> {node_id}")
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except Exception as e:
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print(f" {i+1}. (获取名称失败: {e})")
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except Exception as e:
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print(f"浏览子节点失败: {e}")
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# 尝试不同的路径格式
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print("\n[3] 尝试不同的路径格式访问节点...")
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path_formats = [
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# 格式1: 使用命名空间前缀
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"2:upper/2:upper_weight",
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"2:lower/2:lower_weight",
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# 格式2: 原始字符串（避免转义问题）
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r"2:upper/2:upper_weight",
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r"2:lower/2:lower_weight",
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# 格式3: 使用列表格式
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["2:upper", "2:upper_weight"],
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["2:lower", "2:lower_weight"],
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# 格式4: 不带命名空间前缀
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"upper/upper_weight",
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"lower/lower_weight",
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["upper", "upper_weight"],
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["lower", "lower_weight"],
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]
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for path in path_formats:
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try:
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if isinstance(path, list):
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node = objects.get_child(path)
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else:
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node = objects.get_child(path)
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browse_name = node.get_browse_name()
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value = node.get_value()
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print(f" ✓ 成功: {path}")
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print(f" 节点: {node}")
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print(f" 名称: {browse_name}")
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print(f" 值: {value}")
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print()
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# 找到一个有效的就继续尝试其他格式
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break
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except Exception as e:
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print(f" ✗ 失败: {path}")
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print(f" 错误: {e}")
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print()
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# 尝试方法1：先获取设备对象，再获取变量
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print("\n[4] 方法1: 先获取设备对象，再获取变量...")
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try:
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upper_device = objects.get_child("2:upper")
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print(f" 上料斗设备: {upper_device}")
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upper_weight = upper_device.get_child("2:upper_weight")
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value = upper_weight.get_value()
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print(f" ✓ 成功获取上料斗重量: {value}")
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except Exception as e:
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print(f" ✗ 失败: {e}")
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# 尝试方法2：直接使用完整路径
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print("\n[5] 方法2: 直接使用完整路径...")
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try:
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# 注意：这里使用原始字符串避免转义问题
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upper_weight = objects.get_child(r"2:upper/2:upper_weight")
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value = upper_weight.get_value()
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print(f" ✓ 成功获取上料斗重量: {value}")
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except Exception as e:
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print(f" ✗ 失败: {e}")
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# 尝试方法3：使用get_children遍历
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print("\n[6] 方法3: 使用get_children遍历查找...")
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try:
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for child in objects.get_children():
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try:
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browse_name = str(child.get_browse_name())
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if "upper" in browse_name.lower():
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print(f" 发现上料斗相关节点: {browse_name} -> {child.nodeid}")
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# 尝试获取该节点的子节点
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for sub_child in child.get_children():
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try:
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sub_browse_name = str(sub_child.get_browse_name())
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if "weight" in sub_browse_name.lower():
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value = sub_child.get_value()
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print(f" └─ {sub_browse_name}: {value}")
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except Exception as e:
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print(f" └─ 获取{sub_browse_name}失败: {e}")
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except Exception as e:
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print(f" 处理节点失败: {e}")
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except Exception as e:
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print(f" ✗ 遍历失败: {e}")
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# 尝试写入操作
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print("\n[7] 尝试写入操作...")
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try:
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# 找到有效的节点路径
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upper_device = objects.get_child("2:upper")
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upper_weight = upper_device.get_child("2:upper_weight")
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# 写入测试值
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test_value = 123.45
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upper_weight.set_value(test_value)
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print(f" ✓ 成功写入: {test_value}")
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# 读取验证
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read_value = upper_weight.get_value()
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print(f" ✓ 读取验证: {read_value}")
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except Exception as e:
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print(f" ✗ 写入失败: {e}")
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import traceback
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traceback.print_exc()
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except Exception as e:
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print(f"\n诊断过程出错: {e}")
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import traceback
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traceback.print_exc()
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finally:
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try:
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client.disconnect()
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print("\n[8] 已断开连接")
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except:
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pass
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print("\n" + "=" * 60)
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print("诊断完成")
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print("=" * 60)
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if __name__ == "__main__":
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diagnose_node_access()
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