ABB ACS 400 User Manual

140 ACS 400 User’s Manual
Exception Codes
The ACS 400 supports the standard Modbus exception codes. These are shown in Table 20.
Table 20 Exception codes.
Function Codes
The ACS 400 supports the Modbus function codes given in Table 21. If any other function codes
are used, the ACS 400 returns an exception response with error code 01 (illegal function).
Table 21 Function codes.
Code Name Meaning
01 ILLEGAL
FUNCTION
The function code received in the query is not an allowable
action for the slave.
ACS 400: Unsupported Command
02 ILLEGAL DATA
ADDRESS
The data address received in the query is not an allowable
address for the slave.
ACS 400: Address outside groups
03 ILLEGAL DATA
VALUE
A value contained in the query data field is not an
allowable value for the slave.
ACS 400: Value outside min.-tax limits
ACS 400: Parameter is read-only
ACS 400: Message is too long
ACS 400: Parameter write not allowed when start is active
ACS 400: Parameter write not allowed when factory macro
is selected
Code Description
03 Read holding registers
06 Preset single register
16 (10 Hex) Preset multiple registers
http://nicontrols.com

ABB ACS 400 Specifications

General

Brand	ABB
Model	ACS 400
Category	Controller
Language	English