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36 lines
938 B
36 lines
938 B
import traceback
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import click
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from modbus_tk import modbus_tcp
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class ModbusConnection:
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'''
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Modbus连接管理器
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'''
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def __init__(self, host: str, port: int) -> None:
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self.host = host
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self.port = port
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self.master = None
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def __enter__(self) -> modbus_tcp.TcpMaster:
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self.master = modbus_tcp.TcpMaster(self.host, self.port)
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self.master.set_timeout(5.0)
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return self.master
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def __exit__(self, exc_type, exc_value, _traceback) -> None:
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try:
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if self.master:
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self.master.close()
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if exc_type is not None:
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click.echo("发生异常:")
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click.echo(f"类型: {exc_type}")
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click.echo(f"值: {exc_value}")
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click.echo("调用栈:")
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traceback.print_tb(_traceback)
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except Exception as e :
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print('PLC通信异常:::',str(e))
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