89 lines
3.1 KiB
Python
89 lines
3.1 KiB
Python
# hardware/inverter.py
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from pymodbus.exceptions import ModbusException
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class InverterController:
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def __init__(self, relay_controller):
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self.relay_controller = relay_controller
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self.max_frequency = 400.0 # 频率最大值
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# 变频器配置
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self.config = {
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'slave_id': 1,
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'frequency_register': 0x01, # 2001H
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'start_register': 0x00, # 2000H
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'stop_register': 0x00, # 2000H（用于停机）
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'start_command': 0x0013, # 正转点动运行
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'stop_command': 0x0001 # 停机
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}
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def set_frequency(self, frequency):
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"""设置变频器频率"""
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try:
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if not self.relay_controller.modbus_client.connect():
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print("无法连接网络继电器Modbus服务")
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return False
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# 使用最大频率变量计算百分比
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percentage = frequency / self.max_frequency # 得到 0~1 的比例
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value = int(percentage * 10000) # 转换为 -10000 ~ 10000 的整数
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# 限制范围
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value = max(-10000, min(10000, value))
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result = self.relay_controller.modbus_client.write_register(
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self.config['frequency_register'],
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value,
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slave=self.config['slave_id']
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)
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if isinstance(result, Exception):
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print(f"设置频率失败: {result}")
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return False
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print(f"设置变频器频率为 {frequency}Hz")
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return True
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except ModbusException as e:
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print(f"变频器Modbus通信错误: {e}")
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return False
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finally:
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self.relay_controller.modbus_client.close()
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def control(self, action):
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"""控制变频器启停"""
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# 先检查动作是否有效
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if action not in ['start', 'stop']:
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print(f"无效操作: {action}")
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return False
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try:
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if not self.relay_controller.modbus_client.connect():
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print("无法连接网络继电器Modbus服务")
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return False
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if action == 'start':
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result = self.relay_controller.modbus_client.write_register(
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address=self.config['start_register'],
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value=self.config['start_command'],
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slave=self.config['slave_id']
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)
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print("启动变频器")
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elif action == 'stop':
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result = self.relay_controller.modbus_client.write_register(
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address=self.config['start_register'],
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value=self.config['stop_command'],
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slave=self.config['slave_id']
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)
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print("停止变频器")
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if isinstance(result, Exception):
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print(f"控制失败: {result}")
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return False
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return True
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except ModbusException as e:
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print(f"变频器控制错误: {e}")
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return False
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finally:
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self.relay_controller.modbus_client.close()
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