Hitachi CP-X200 instruction manual Query

B－17

B17

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.

	Function Code
Query	Exception Response
0 1 h	8 1 h
0 3 h	8 3 h
0 5 h	8 5 h
0 6 h	8 6 h
0 F h	8 F h
1 0 h	9 0 h

	Exception Code
Code	Description
0 1 h	The specified function is not supported.
0 2 h	The specified function is not found.
0 3 h	The format of the specified data is not acceptable.
2 1 h	The data to be written in a holding register is outside the inverter.
	The specified functions are not available to the inverter.
	ξ Function to change the content of a register that cannot be changed while
2 2 h	the inverter is in service
	ξ Function to submit an ENTER command during running (UV)
	ξ Function to write in a register during tripping (UV)
	ξ Function to write in a read-only register (or coil)

Appendix BAppendix B