26 lines
886 B
Python
26 lines
886 B
Python
import asyncio
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from pymodbus.server import StartAsyncTcpServer
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from pymodbus.datastore import ModbusSlaveContext, ModbusServerContext
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from pymodbus.datastore.store import ModbusSequentialDataBlock
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# 建立 HR 暫存區，從位址 1633 開始，總共 100 筆
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store = ModbusSlaveContext(
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hr=ModbusSequentialDataBlock(1633, [0]*100)
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)
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context = ModbusServerContext(slaves={255: store}, single=False)
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async def read_loop():
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while True:
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# 從 HR address 1633 開始，讀取 3 筆資料
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values = context[255].getValues(3, 1633, count=3)
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print(f"PLC 寫入的資料: {values}")
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await asyncio.sleep(1) # 每秒顯示一次
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async def run_server():
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asyncio.create_task(read_loop()) # 啟動背景讀取任務
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await StartAsyncTcpServer(context, address=("169.254.11.130", 502))
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if __name__ == "__main__":
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asyncio.run(run_server())
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