186 lines
6.6 KiB
Python
186 lines
6.6 KiB
Python
#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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"""
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VWED在线脚本Modbus使用示例
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演示如何在脚本中使用Modbus功能
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"""
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import sys
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import os
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import time
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# 添加项目根目录到路径
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sys.path.insert(0, os.path.join(os.path.dirname(__file__), '..'))
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from services.online_script.script_vwed_objects import create_vwed_object
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def modbus_script_example():
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"""模拟在线脚本中使用Modbus功能"""
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print("VWED在线脚本 - Modbus使用示例")
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print("="*50)
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# 创建VWED对象（模拟脚本环境）
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VWED = create_vwed_object("example_script")
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# Modbus服务器配置
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MODBUS_HOST = "localhost"
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MODBUS_PORT = 5020
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SLAVE_ID = 1
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print(f"连接到Modbus服务器: {MODBUS_HOST}:{MODBUS_PORT}")
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print(f"从站ID: {SLAVE_ID}")
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# 示例1: 基础读取操作
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print("\n示例1: 基础读取操作")
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print("-" * 30)
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# 读取保持寄存器
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value = VWED.modbus.read_holding_register(MODBUS_HOST, MODBUS_PORT, SLAVE_ID, 0, 2)
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print(f"保持寄存器[0]: {value}")
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# 读取输入寄存器
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value = VWED.modbus.read_input_register(MODBUS_HOST, MODBUS_PORT, SLAVE_ID, 0, 2)
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print(f"输入寄存器[0]: {value}")
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# 读取线圈状态
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value = VWED.modbus.read_coil_status(MODBUS_HOST, MODBUS_PORT, SLAVE_ID, 0)
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print(f"线圈[0]: {value}")
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# 读取离散输入
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value = VWED.modbus.read_input_status(MODBUS_HOST, MODBUS_PORT, SLAVE_ID, 0)
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print(f"离散输入[0]: {value}")
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# 示例2: 批量读取操作
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print("\n示例2: 批量读取操作")
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print("-" * 30)
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# 批量读取保持寄存器
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values = VWED.modbus.batch_read_holding_registers(MODBUS_HOST, MODBUS_PORT, SLAVE_ID, 0, 5)
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print(f"保持寄存器[0-4]: {values}")
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# 批量读取输入寄存器
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values = VWED.modbus.batch_read_input_registers(MODBUS_HOST, MODBUS_PORT, SLAVE_ID, 0, 5)
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print(f"输入寄存器[0-4]: {values}")
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# 示例3: 写入操作
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print("\n示例3: 写入操作")
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print("-" * 30)
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# 写入保持寄存器
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success = VWED.modbus.write_holding_register(MODBUS_HOST, MODBUS_PORT, SLAVE_ID, 0, 2, 12345)
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print(f"写入保持寄存器[0] = 12345: {'成功' if success else '失败'}")
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# 验证写入结果
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value = VWED.modbus.read_holding_register(MODBUS_HOST, MODBUS_PORT, SLAVE_ID, 0, 2)
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print(f"验证读取结果: {value}")
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# 写入线圈
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success = VWED.modbus.write_coil_status(MODBUS_HOST, MODBUS_PORT, SLAVE_ID, 1, True)
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print(f"写入线圈[1] = True: {'成功' if success else '失败'}")
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# 验证写入结果
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value = VWED.modbus.read_coil_status(MODBUS_HOST, MODBUS_PORT, SLAVE_ID, 1)
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print(f"验证读取结果: {value}")
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# 示例4: 批量写入操作
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print("\n示例4: 批量写入操作")
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print("-" * 30)
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# 批量写入保持寄存器
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test_values = [1000, 2000, 3000, 4000, 5000]
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success = VWED.modbus.batch_write_holding_register(MODBUS_HOST, MODBUS_PORT, SLAVE_ID, 0, test_values)
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print(f"批量写入保持寄存器[0-4]: {'成功' if success else '失败'}")
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# 验证结果
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values = VWED.modbus.batch_read_holding_registers(MODBUS_HOST, MODBUS_PORT, SLAVE_ID, 0, 5)
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print(f"验证读取结果: {values}")
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# 批量写入线圈
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coil_values = [True, False, True, False, True]
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success = VWED.modbus.batch_write_coil_status(MODBUS_HOST, MODBUS_PORT, SLAVE_ID, 0, coil_values)
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print(f"批量写入线圈[0-4]: {'成功' if success else '失败'}")
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# 验证结果
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values = VWED.modbus.batch_read_coil_status(MODBUS_HOST, MODBUS_PORT, SLAVE_ID, 0, 5)
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print(f"验证读取结果: {values}")
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# 示例5: 通用读写操作
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print("\n示例5: 通用读写操作")
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print("-" * 30)
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# 使用通用方法读取不同类型的地址
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type_names = {
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'0x': '线圈',
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'1x': '离散输入',
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'3x': '输入寄存器',
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'4x': '保持寄存器'
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}
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for type_str, name in type_names.items():
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value = VWED.modbus.read_single_modbus_value(MODBUS_HOST, MODBUS_PORT, SLAVE_ID, type_str, 0)
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print(f"{name}[0] (类型{type_str}): {value}")
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# 通用写入（只对可写类型）
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success = VWED.modbus.write_single_modbus_value(MODBUS_HOST, MODBUS_PORT, SLAVE_ID, '4x', 10, 9999)
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print(f"通用写入保持寄存器[10] = 9999: {'成功' if success else '失败'}")
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# 示例6: 使用预配置实例
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print("\n示例6: 使用预配置实例")
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print("-" * 30)
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# 配置一个Modbus实例
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VWED.modbus.configure_modbus_instance("PLC1", MODBUS_HOST, MODBUS_PORT, SLAVE_ID, "4x")
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print("已配置实例: PLC1")
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# 使用实例名称进行操作
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value = VWED.modbus.read_single_modbus_value_by_instance_name("PLC1", 0)
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print(f"通过实例PLC1读取[0]: {value}")
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success = VWED.modbus.write_single_modbus_value_by_instance_name("PLC1", 0, 8888)
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print(f"通过实例PLC1写入[0] = 8888: {'成功' if success else '失败'}")
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# 验证结果
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value = VWED.modbus.read_single_modbus_value_by_instance_name("PLC1", 0)
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print(f"验证结果: {value}")
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# 示例7: 模拟实际应用场景
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print("\n示例7: 模拟实际应用场景")
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print("-" * 30)
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# 配置多个设备实例
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VWED.modbus.configure_modbus_instance("温度传感器", MODBUS_HOST, MODBUS_PORT, SLAVE_ID, "3x")
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VWED.modbus.configure_modbus_instance("控制器", MODBUS_HOST, MODBUS_PORT, SLAVE_ID, "4x")
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# 读取传感器数据
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temperature = VWED.modbus.read_single_modbus_value_by_instance_name("温度传感器", 0)
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humidity = VWED.modbus.read_single_modbus_value_by_instance_name("温度传感器", 1)
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print(f"温度: {temperature}, 湿度: {humidity}")
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# 根据传感器数据控制设备
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if temperature and temperature > 150: # 假设温度过高
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# 启动冷却系统
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success = VWED.modbus.write_single_modbus_value_by_instance_name("控制器", 0, 1)
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print(f"温度过高({temperature})，启动冷却系统: {'成功' if success else '失败'}")
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else:
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# 关闭冷却系统
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success = VWED.modbus.write_single_modbus_value_by_instance_name("控制器", 0, 0)
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print(f"温度正常({temperature})，关闭冷却系统: {'成功' if success else '失败'}")
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print("\n示例脚本执行完成！")
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def main():
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"""主函数"""
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try:
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modbus_script_example()
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except Exception as e:
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print(f"脚本执行出错: {e}")
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import traceback
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traceback.print_exc()
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if __name__ == "__main__":
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main() |