我正在尝试从Modbus TCP设备读取String(Usecase-1) & multiple type of data in one request(Usecase-2) 数据，但未能正确解码。

系统配置：

Python 3.6.5
Pymodbus：2.1.0
平台：Windows 10 64 位

Modbus TCP 服务器：

import logging

from pymodbus.constants import Endian
from pymodbus.datastore import ModbusSequentialDataBlock
from pymodbus.datastore import ModbusSlaveContext, ModbusServerContext
from pymodbus.device import ModbusDeviceIdentification
from pymodbus.payload import BinaryPayloadBuilder
from pymodbus.server.sync import StartTcpServer

class ModbusTCPServer(object):
    # initialize your data store:
    hrBuilder = BinaryPayloadBuilder(byteorder=Endian.Big, wordorder=Endian.Big)
    # Usecase-1
    hrBuilder.add_string("abcdefghij")

    #Uncomment below three lines for usecase-2
    # hrBuilder.add_32bit_float(20.5) 
    # hrBuilder.add_32bit_int(45) 
    # hrBuilder.add_bits([1, 0, 0, 0, 0, 0, 0, 0])

    hrBlock = ModbusSequentialDataBlock(0, hrBuilder.to_registers() * 100)
    store = ModbusSlaveContext(hr=hrBlock, ir=hrBlock, di=hrBlock, co=hrBlock)
    slaves = {
        1: store,
    }
    context = ModbusServerContext(slaves=slaves, single=False)

    # initialize the server information    
    identity = ModbusDeviceIdentification()

    modbusDeviceAddress = "127.0.0.1"
    modbusDevicePort = 501
    # run the TCP server

    # TCP:
    print("Modbus TCP Server started.")
    StartTcpServer(context, identity=identity, address=(modbusDeviceAddress, modbusDevicePort))


if __name__ == "__main__":
    print("Reading application configurations...")
    ModbusTCPServer();

Modbus TCP 客户端：

from pymodbus.client.sync import ModbusTcpClient as ModbusClient
from pymodbus.payload import BinaryPayloadDecoder
from pymodbus.constants import Endian
from pymodbus.compat import iteritems

if __name__ == '__main__':
    client = ModbusClient('127.0.0.1', port=501)
    client.connect()
    result  = client.read_holding_registers(0, 5,  unit=1)
    print("Result : ",result)
    decoder = BinaryPayloadDecoder.fromRegisters(result.registers, byteorder=Endian.Big, wordorder=Endian.Big)
    # Usecase-1
    decoded = {
        'name': decoder.decode_string(10).decode(),
    }

    # Usecase-2
    # decoded = {
    #    'temp': decoder.decode_32bit_float(),
    #    'rpm': decoder.decode_32bit_int(),
    #    'status': decoder.decode_bits()
    #}

    for name, value in iteritems(decoded):
        print ("%s\t" % name, value)
    client.close()

输出用例 1：

Result :  ReadRegisterResponse (5)
name     cdefghijab

Modbus 客户端应该将字符串解码为abcdefghij但是，它将其解码为cdefghijab.

输出用例 2：

Result :  ReadRegisterResponse (5)
temp     0.0
rpm  2949376
status   [True, False, False, False, False, False, True, False]

查看上面读取多个寄存器的输出，输出值与 input 中给出的值不匹配BinaryPayloadBuilder。

我已经尝试了byteorder& 的所有组合，wordorder但是，它不适用于任何情况。

请帮助我理解为什么数据是这样解码的？在编码或解码此数据时，我是否错过了要添加的内容？

仅供参考：此解决方案适用于Pymodbus 1.5.1版本。最近我升级了版本，但没有按预期工作。

任何帮助，将不胜感激。