ABB C100 - 6 EXCEPTION RESPONSES; Exception Response Codes; 6.1 Examples

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6.1 Examples
A Read Register Request to read holding register address 100 of Slave 01
(undefined address for Slave, beyond address limit).
Register Register Number Number Error
Start Start of of Check
Address Function Offset Offset Registers Registers Field (CRC-16)
High Low High Low
01 03 00 FA 00 06 E5 F9
The slave replies with an exception response signifying an ‘illegal data address’. To
indicate that the response is a notification of an error, the most significant bit of the
function code is set to 1.
Slave Address Function Exception Error Check (CRC-16)
01 83 02 C0 F1
6 EXCEPTION RESPONSES
Table 6.1 Exception Response Codes
The exception response codes sent by the slave are shown in Table 6.1. When a
slave detects one of these errors, it sends a response message to the master
consisting of slave address, function code, error code and error check fields.
Exception
Response
Code
Exception Response
Name
Exception Response
Definition
Illegal
Function
Illegal
Data Address
Illegal
Data Value
Negative
Acknowledgement
Memory
Parity Error
The message function received is not an allowable
function on the COMMANDER 100/150/160/V100.
The address reference in the data field is not an allowable
address for the COMMANDER 100/150/160/V100.
The value referenced in the data field is not allowable
in the addressed slave location.
The function just requested cannot be performed.
Parity check indicates an error in one or more of the
characters received.
01
02
03
07
08