Exception Response - Hitachi WJ200 Series Instruction Manual

B−18

Exception Response:

When sending a query (excluding a broadcasting query) to an inverter, the master
always requests a response from the inverter. Usually, the inverter returns a response
according to the query. However, when finding an error in the query, the inverter
returns an exception response. The exception response consists of the fields shown
below.
Field Configuration
Slave address
Function code
Exception code
CRC-16
The content of each field is explained below. The function code of the exception
response is the sum of the function code of the query and 80h. The exception code
indicates the factor of the exception response.
Query
0 1 h
0 3 h
0 5 h
0 6 h
0 F h
1 0 h
Code
0 1 h
0 2 h
0 3 h
2 1 h
2 2 h
Function Code
Exception Response
8 1 h
8 3 h
8 5 h
8 6 h
8 F h
9 0 h
The specified function is not supported.
The specified function is not found.
The format of the specified data is not acceptable.
The data to be written in a holding register is outside the inverter.
The specified functions are not available to the inverter.
• Function to change the content of a register that cannot be changed while
the inverter is in service
• Function to submit an ENTER command during running (UV)
• Function to write in a register during tripping (UV)
• Function to write in a read-only register (or coil)
Exception Code
Description