Output Description

DONE

Data_Type	Default_Value	Range	Unit
BOOL	-	-	-

Output DONE indicates the processing state of the Function Block. After completion of the request or after abortion of the Function Block processing due to an error, DONE is set to TRUE for one cycle. This output always has to be considered together with output ERR. If ERR is TRUE, an error occurred. In this case, the error number can be read at output ERNO.

ERR

Data_Type	Default_Value	Range	Unit
BOOL	-	-	-

Output ERR indicates whether an error occurred during Function Block processing. This output always has to be considered together with output DONE. If DONE = TRUE and ERR = TRUE, an error occurred. In this case, the error number can be read at output ERNO.

ERNO

Data_Type	Default_Value	Range	Unit
WORD	-	-	-

Output ERNO provides an error identifier if an invalid value has been applied to an input or if an error occurred during Function Block processing. ERNO always has to be considered together with the outputs DONE and ERR. The value output at ERNO is only valid if DONE is TRUE and ERR is TRUE. Encoding of the error messages output at ERNO is explained in a separate table “Error messages of the Function Block libraries” Error Messages of the Function Block Libraries.

DATA_LEN

Data_Type	Default_Value	Range	Unit
BYTE	-	-	-

At input DATA_LEN, the length of the data to be transmitted which are stored in the variable at address DATA is specified as a byte value.