说明：
01：从机地址
03
：功能码
04
：十六进制，十进制为
4
，表示后面有
4
个
字节的数据 Hexadecimal, decimal is 4, indicates that
the following 4 bytes of data
5a 50
：循环冗余校验码
处理如下：03 b2(16 进制) = 946 (10 进制电流数据)
00 00(16
进制
) = 0 (10
进制小数点数据
)
计算：946×10
0-3
= 0.946；单位：安培（A）
则仪表显示：
I=0.946
读电压表数据与读电流表类似，但起始地址为
00H
，
查询帧：01 03 00 00 00 02 c4 0b
读其它信息的查询帧与此格式相同，各信息地址见
通讯参量地址表。
注：电压、电流、功率的有效数据与指数位均为有
符号数据，若一数读出为“FFFF”，则表示该数据为
“
-1
”
Description:
01：Slave address
03：Function code
04：Hexadecimal, decimal is 4, indicates that the
following 4 bytes of data
5a 50: Cyclic Redundancy Check Codes
The processing is as follows:
03 b2 (hexadecimal) = 946 (decimal current data)
00 00 (hexadecimal) = 0 (decimal data)
Calculation: 946×100-3 = 0.946; Unit: Ampere (A)
The meter displays:
I=0.946
Reading voltage data is similar to reading current,
but the starting address is 00H, query frame: 01 03 00
00 00 02 c4 0b.
The query frame for reading other information is
the same as this format, and each information address
is in the communication parameter address table.
Note: The valid data and exponent bits of voltage,
current, and power are both signed data. If a number is
read as “FFFF”, it means the data is “-1”.
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