ModbusInvalidResponseError: Invalid CRC in response

[dujc]

-- coding: utf_8 --

import serial import modbus_tk import modbus_tk.defines as cst from modbus_tk import modbus_rtu

def mod(PORT="com9"): red = [] alarm = "" try:

设定串口为从站

    master = modbus_rtu.RtuMaster(serial.Serial(port=PORT,
                                                baudrate=38400, bytesize=8, parity='N', stopbits=1))
    master.set_timeout(5.0)
    master.set_verbose(True)

    red = master.execute(1, cst.READ_HOLDING_REGISTERS, 64012, 1)  # 这里可以修改需要读取的功能码
    print(red)
    alarm = "正常"
    return list(red), alarm

except Exception as exc:
    print(str(exc))
    alarm = (str(exc))

return red, alarm  ##如果异常就返回[],故障信息

if name == "main": mod()

return:

ModbusInvalidResponseError: Invalid CRC in response

[dujc]

-- coding: utf_8 --

import serial import modbus_tk.defines as cst from modbus_tk import modbus_rtu

def main(): master = modbus_rtu.RtuMaster(serial.Serial(port="COM9", baudrate=38400, bytesize=8, parity='N', stopbits=1)) master.set_timeout(5.0) master.set_verbose(True)

    red = master.execute(1, cst.READ_HOLDING_REGISTERS, 64012, 1)  # 这里可以修改需要读取的功能码
    print(red)

if name == "main": main()

return:

Traceback (most recent call last): File "D:\WorkSpace\Test\main.py", line 20, in main() File "D:\WorkSpace\Test\main.py", line 15, in main red = master.execute(1, cst.READ_HOLDING_REGISTERS, 64012, 1) # 这里可以修改需要读取的功能码 File "D:\WorkSpace\Test\venv\lib\site-packages\modbus_tk\utils.py", line 39, in new raise excpt File "D:\WorkSpace\Test\venv\lib\site-packages\modbus_tk\utils.py", line 37, in new ret = fcn(*args, **kwargs) File "D:\WorkSpace\Test\venv\lib\site-packages\modbus_tk\modbus.py", line 356, in execute response_pdu = query.parse_response(response) File "D:\WorkSpace\Test\venv\lib\site-packages\modbus_tk\modbus_rtu.py", line 60, in parse_response raise ModbusInvalidResponseError("Invalid CRC in response") modbus_tk.exceptions.ModbusInvalidResponseError: Invalid CRC in response

[zhuyujie1993]

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