CD Automation CD3200, Руководство пользователя

Страница: 40 / 50

CD Automation srl CD3200-1PH from 15A to 110A User’s Manual
40
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 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.