Hitachi SJ700D-004L, Instruction Manual

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Chapter 4 Explanation of Functions
4-139
(ix) Exception response
The master system requests the inverter (slave) to return a response upon reception of a query other than broadcasted
queries. The inverter must return the response that matches the query it has received. However, if an error is found in
a query, the inverter will return an exception response.
The exception response consists of the following fields:
Field configuration
Slave address
Function code
Exception code
CRC-16 code
Details of the field configuration are described below. The exception response in reply to a query includes a function
code that is the sum of "80h" and the function code specified by the query. The exception code in the exception
response indicates the content of the error.
Function codes
Query Exception response
01h 81h
03h 83h
05h 85h
06h 86h
0Fh 8Fh
10h 90h
17h 97h
Exception codes
Code Description
01h
An unsupported function is specified.
02h
The specified address is not found.
03h
The specified data has an unacceptable format.
21h
The data to be written to a register exceeds the range of inverter
specifications.
22h
The inverter restricts the execution of the specified function:
- Rewriting a register that cannot be rewritten during the operation
- Issuing an Enter command during the operation (in undervoltage
status)
- Writing to a register during tripping (because of undervoltage)
- Writing to a read-only register (coil)
23h
Writing function code is used to reading only parameter.
25h
Accessing the parameter of differrent mode.
- When the variable torque mode (VT) is selected, the master device
read/write to inverter’s parameters that the constant torque mode (CT)
is only available.
26h
The master device access to read/write while the inverter access the
eeprom to save the data or inverter is initializing.