Pymodbus寄存器无法正确解码

Question

from pymodbus.payload import BinaryPayloadDecoder
from pymodbus.constants import Endian
from pymodbus.client.sync import ModbusTcpClient

def convertINT32(data):
       decoder = BinaryPayloadDecoder.fromRegisters(data, Endian.Big, wordorder=Endian.Little)
       return decoder.decode_32bit_int()

client = ModbusTcpClient(host="176.219.182.106", port="502")
client.connect()
data = client.read_holding_registers(address=230,count=10,unit=1)

eaPlus = convertINT32(data.registers[0:2]) # kWh Del
eaNeg = convertINT32(data.registers[2:4])  # kWh Rec
erPlus = convertINT32(data.registers[4:6]) #VARh Del
erNeg = convertINT32(data.registers[6:8])  #kVAR Rec

client.close()

print("Active Energy Plus: %s \nActive Energy Negative: %s \nReactive Energy Plus: %s \nReactive Energy Negative: %s" %(eaPlus,eaNeg, erPlus, erNeg))
print("----------------------------")
print("Register List: %s" % data.registers)
print("----------------------------")
print("Actual values are APPROXİMATE:\nActive Energy Plus: 989 \nActive Energy Negative: 3879077 \nReactive Energy Plus: 268384 \nReactive Energy Negative: 361")

我正在从Schneider ION7650读取仪表值（如果您不知道，我不在乎），以下是modbus寄存器列表：

我知道确切的值，我将结果与它们进行比较，我的代码看起来是错误的。IP地址和端口是可访问的，因此您可以访问仪表。这里怎么了

和输出：

Active Energy Plus: 3867613 
Active Energy Negative: 275048
Reactive Energy Plus: 6270
Reactive Energy Negative: 3866985
----------------------------
Register List: [989, 59, 12904, 4, 6270, 0, 361, 59, 23532, 65535]
----------------------------
Actual values are APPROXİMATE:
Active Energy Plus: 989
Active Energy Negative: 3879077
Reactive Energy Plus: 268384
Reactive Energy Negative: 361

您还可以检查here中的值实时值，然后单击“消耗”

Answer 1

从Modbus Protocol and Register Map for ION Devices documentation（第12页）开始：

According to the Modbus protocol, in response to a request for register 4xxxx of a particular slave device, the Modbus master reads register xxxx-1 from the slave. For example, register 40011 corresponds to holding register 10.

因此，将address设置为229而不是230，以从地址230开始读取10个寄存器。此外，字节顺序和字顺序都是big-endian

我试了一下，得到了预期的值

Answer 2

我找到了解决办法。当我从BinaryDecoder中删除WordOrder时，from会注册它的工作。我还看到Modbus轮询中的订单列表。有很多像这样的选择

• A B C D（字节顺序：大端）
• D C B A
• C D A B
• B A D C（字节顺序：小端）

如果我错了，请纠正我。如何读取其他选项。还有词序是什么？有没有一个像wordorder=Endian.Big byteorder=Endian.Little这样的组合读作“C D a B”呢