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43 lines
1.3 KiB
Python
43 lines
1.3 KiB
Python
import modbus_tk.modbus_tcp as modbus_tcp
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import modbus_tk.defines as cst
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from modbus_tk.modbus import Slave
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# 创建一个 Modbus TCP 服务器
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server = modbus_tcp.TcpServer(
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address="localhost", port=5020, timeout_in_sec=1
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)
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# 设置服务器的地址和端口
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# server.set_address("localhost", 5020) # 监听在本地端口5020
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# 添加一个从设备，Slave ID 设为 1
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slave: Slave = server.add_slave(1)
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# 向从设备添加一个保持寄存器块，假设从地址0开始，10个寄存器
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# def add_block(self, block_name, block_type, starting_address, size)
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# slave.add_block('0', cst.HOLDING_REGISTERS, 0, 10)
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# 添加一个线圈
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# 0 名字， 从 16 字节内存位置开始，分配连续两个字节的内存大小，注意地址只能是 8 的整数倍
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slave.add_block('0', cst.COILS, 2*8, 2)
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# 1 名字，100 起始地址， 8 是从 100 的位置分配 8 个字节内存， 两个线圈的量
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slave.add_block('1', cst.HOLDING_REGISTERS, 100, 8)
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slave.add_block('2', cst.HOLDING_REGISTERS, 200, 16)
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# slave.add_block('2', cst.DISCRETE_INPUTS , 200, 2)
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# slave.add_block('3', cst.ANALOG_INPUTS , 300, 2)
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# 启动服务器
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server.start()
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print("Modbus TCP server running on localhost:5020")
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# 保持服务器运行，直到按下 Ctrl+C
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try:
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while True:
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pass
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except KeyboardInterrupt:
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server.stop()
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print("Server stopped.")
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