Technical data

Chapter 4 – Communication
RS485 and RS232 Adapter Installation and Start-up Guide 4-3
The register addresses between the groups are invalid. No reads or writes are
allowed for these addresses. If there is an attempt to read or write outside the
parameter addresses, the Modbus interface will return an exception code to the
controller.
Exception Codes
The ACS 160 supports the standard Modbus exception codes. These are
shown in Table 4-2.
Table 4-2 Exception codes.
Code Name Meaning
01 ILLEGAL
FUNCTION
The function code received in the query is not an
allowable action for the slave.
ACS 160 : Unsupported Command.
02 ILLEGAL DATA
ADDRESS
The data address received in the query is not an
allowable address for the slave.
ACS 160 : Address outside groups
03 ILLEGAL DATA
VALUE
A value contained in the query data field is not an
allowable value for the slave.
ACS 160 : Value outside min-max limits
ACS 160 : Parameter is read-only
ACS 160 : Message is too long
ACS 160 : Parameter write not allowed when start is
active
ACS 160 : Parameter write not allowed when factory
macro is selected