问 PyModbus无法通过TCP读取RTU中的输入寄存器

EN

我尝试使用 pymodbus 读取Modbus信号，但得到错误，来源如下：

当服务器响应TCP时，有一个MAC地址通知功能。怎样才能无错误地进行Modbus通信？如何删除TCP报头部分？

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该手册的地址如下： https://www.eztcp.com/en/download/pds_files/an_ezmanager_en.pdf

from pymodbus.client.sync import ModbusTcpClient
from pymodbus.transaction import ModbusRtuFramer as ModbusFramer
import time
import logging
logging.basicConfig()
log = logging.getLogger()
log.setLevel(logging.DEBUG)
def run_read_data(ip, port_num, unit_num):
    while True:
        client = ModbusTcpClient(ip, port=port_num, framer=ModbusFramer)
        con = client.connect()
        while con :
            rr = client.read_input_registers(0,10, unit=unit_num)        
                print(rr,rr.registers)
            except Exception as e:
                print(f"{type(e).__name__}: {e}")
                time.sleep(2)
                client.close()
                time.sleep(2)
                break
            time.sleep(1)
        time.sleep(1)
if __name__ == "__main__":
    ip = "x.x.x.x" 
    port_num = x
    unit_num = 0x1
    run_read_data(ip, port_num,unit_num)

结果是这样的：

DEBUG:pymodbus.transaction:Current transaction state - IDLE
DEBUG:pymodbus.transaction:Running transaction 1
DEBUG:pymodbus.transaction:SEND: 0x18 0x4 0x0 0x0 0x0 0xa 0x72 0x4
DEBUG:pymodbus.client.sync:New Transaction state 'SENDING'
DEBUG:pymodbus.transaction:Changing transaction state from 'SENDING' to 'WAITING FOR REPLY'
DEBUG:pymodbus.transaction:Changing transaction state from 'WAITING FOR REPLY' to 'PROCESSING REPLY'
DEBUG:pymodbus.transaction:RECV: 0x30 0x30 0x33 0x30 0x66 0x39 0x31 0x31 0x34 0x30 0x38 0x35 0xd 0xa 0x18 0x4 0x14 0xe8 0xf9 0x2 0x45 0xf3 0x88 0x1 0x22
DEBUG:pymodbus.framer.rtu_framer:CRC invalid, discarding header!!
DEBUG:pymodbus.framer.rtu_framer:Resetting frame - Current Frame in buffer - 0x30 0x30 0x33 0x30 0x66 0x39 0x31 0x31 0x34 0x30 0x38 0x35 0xd 0xa 0x18 0x4 0x14 0xe8 0xf9 0x2 0x45 0xf3 0x88 0x1 0x22
DEBUG:pymodbus.framer.rtu_framer:Frame check failed, ignoring!!
DEBUG:pymodbus.framer.rtu_framer:Resetting frame - Current Frame in buffer -
DEBUG:pymodbus.transaction:Getting transaction 24
DEBUG:pymodbus.transaction:Changing transaction state from 'PROCESSING REPLY' to 'TRANSACTION_COMPLETE'
AttributeError: 'ModbusIOException' object has no attribute 'registers'
DEBUG:pymodbus.transaction:Current transaction state - IDLE
DEBUG:pymodbus.transaction:Running transaction 1
DEBUG:pymodbus.transaction:SEND: 0x18 0x4 0x0 0x0 0x0 0xa 0x72 0x4
DEBUG:pymodbus.client.sync:New Transaction state 'SENDING'
DEBUG:pymodbus.transaction:Changing transaction state from 'SENDING' to 'WAITING FOR REPLY'
DEBUG:pymodbus.transaction:Changing transaction state from 'WAITING FOR REPLY' to 'PROCESSING REPLY'
DEBUG:pymodbus.transaction:RECV: 0x30 0x30 0x33 0x30 0x66 0x39 0x31 0x31 0x34 0x30 0x38 0x35 0xd 0xa 0x18 0x4 0x14 0xe9 0x9f 0x2 0x45 0xf3 0xd5 0x1 0x22
DEBUG:pymodbus.framer.rtu_framer:CRC invalid, discarding header!!
DEBUG:pymodbus.framer.rtu_framer:Resetting frame - Current Frame in buffer - 0x30 0x30 0x33 0x30 0x66 0x39 0x31 0x31 0x34 0x30 0x38 0x35 0xd 0xa 0x18 0x4 0x14 0xe9 0x9f 0x2 0x45 0xf3 0xd5 0x1 0x22
DEBUG:pymodbus.framer.rtu_framer:Frame check failed, ignoring!!
DEBUG:pymodbus.framer.rtu_framer:Resetting frame - Current Frame in buffer -
DEBUG:pymodbus.transaction:Getting transaction 24