HNC Electric HV950-1R5G1(B), Руководство пользователя

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function code parameters comply with specificatoins in the user manual. Group
numbers of functions codes are mapped to the high byte of register address.The group
index is mapped to the low byte of register address. Control parameters and status
parameters of the inverter are virtualized as inverter function code groups.
Correspondence relation between the register address high byte and function codes
group number is as follows
F0 Group
：
0x00
；
F1 Group
：
0x01
；
F2 Group
：
0x02
；
F3 Group
：
0x03
；
F4 Group
：
0x04
；
F5 Group
：
0x05
；
F6 Group
：
0x06
；
F7 Group
：
0x07
；
F8 Group
：
0x08
；
F9 Group
：
0x09
；
FA Group
：
0x0A
；
FB Group
：
0x0B
；
FC Group
：
0x0C
；
FD Group
：
0x0D
；
FE Group
：
0x0E
；
FL Group
：
0x11
；
FN Group
：
0x12
；
FP Group
：
0x13
；
FU Group
：
0x14
；
Inverter control parameters Group
：
0x32
；
Inverter state parameter
Group
：
0x33
。
E.g. the inverter function code parameter F3.02 maps to register address 0x302. The
function code parameter FB.01 maps to the register address 0xB01.
As already described the formatting of an entire data frame, the following will focus
on the Modbus protocol function codes and the format and meaning of the data. It
refers to the content of "function code" and "Data" section in the data frame format.
The two parts compose a Modbus application layer protocol data unit. The
application-layer protocol data unit mentioned below refers to these two parts.
The application layer protocol data unit for reading inverter parameters is as
follows:
Application layer
protocol Data Unit
Data length
（
number of bytes
）
Values or range
Function code 1 0x03
Initial register address 2 0x0000~0xFFFF
Register number 2 0x0001~0x0004
Response format as below
：
Application layer
protocol Data Unit
Data length
（
number of bytes
）
Values or range
Function code 1 0x03
Read number of bytes 1 2* Register number
Read content 2* Register number
If the operation fails, error code and exception code will be responded. The error code
is “function code + 0x80”, exception code denotes the cause of the error. Exception
code listed below:
exception code Description
0x1
Illegal function code
0x2
Illegal register address.
0x3
Data error, i.e., data more than upper limit or lower limit
。
0x4
Operation failure of slave drive (including error caused by invalid
data in the range of upper limit and lower limit)
0x5
Command is valid and in process, mainly used for storing data to
the nonvolatile storage.