CD Automation srl
STE Soft Starter
User’s Manual
54
12.6
Error and exception responses
If a message contains an altered character, if fails the CRC, or if the received message contains a syntax
error (for example the number of the byte or of the words is not correct), then the unit will ignore the
message.
If the received message is correct but contains a not valid value, the unit will send an answer of
exception (5 byte):
Address Unit
Function
Error Code
CRC 16
LO
HI
The byte with the function number, represent the function number of the message that has caused the
error with the first Bit set to 1 (ex. the function 3 becomes 0x83) The error code could be one of the
followings:
Error Code
Name
Cause
1
ILLEGAL FUNCTION
Function not supported.
2
ILLEGAL DATA ADDRESS
Address out of range.
3
ILLEGAL DATA VALUE
Attempt to write invalid or action not carried out.
NOTE: If you write a parameter's value equal at his actual value this is a valid transaction
and don't cause an error.
12.7
Address Configuration
The STE Soft Starter is assigned a unique device address by the user in the range 1 (default) to 127
using the parameter P103
==+
in the Hardware menu. This address is used to recognise the messages
queries to her assigned.
The unit does not respond at the messages queries that don't have the same assigned address.
The STE Soft Starter will also accept global messages (Broadcast) sends at the address 0. No responses
are returned for globally addressed queries.
ENG STE_SOFTSTARTER - 02.DOC
Summary of Contents for STE Series
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