CD Automation srl
12.5 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
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
1
2
3
NOTE: If you write a parameter's value equal at his actual value this is a valid transaction
and don't cause an error.
CD3200-1PH from 15A to 110A
Function
Name
ILLEGAL FUNCTION
ILLEGAL DATA ADDRESS
ILLEGAL DATA VALUE
Error Code
Function not supported.
Address out of range.
Attempt to write invalid or action not carried out.
40
User's Manual
CRC 16
LO
Cause
HI
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