Modbus services

Error response

An error response is returned by the Altivar 212 when it is unable to perform the request.

Format of an error response:

Slave

Function code

Exception code

 

CRC16

no.

 

 

Lo

 

Hi

 

 

 

 

 

 

 

 

 

1 byte

1 byte

1 byte

 

2 bytes

Function code: request code + H’80.

Exception code:

Exception Code

Description

 

 

01

Unknown function:

 

The function code received in the query is not an allowable action for the drive.

 

- The function is not supported by the drive error.

 

- Function code 43 but MEI Type not equal: to 14.

 

 

02

Illegal data address:The data address received in the query is not an allowable address for the drive.

 

- Modbus address is not supported.

 

- Request to write a read only parameter.

 

 

03

Illegal data value:

 

A value contained in the query data field is not an allowable value for the drive.

 

- Data range not allowed.

 

- Fixed data not allowed.

 

- Function code 43 and MEI Type 14 but invalid Read Device ID Code (Read Dev ID code > 3).

04Unable to execute:

The request commands an operation that the Altivar 212 is not able to execute due to another task or condition.

-Request to write in a parameter that cannot be changed during running.

-Request to write during executing "tyP" (return to factory setting ...).

-Interruption occurs during writing data.

S1A53844 01/2011

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Schneider Electric Altivar 212 manual Error response, Exception code