Output Description

DONE

Data_Type	Default_Value	Range	Unit
BOOL	-	-	-

DONE indicates the processing state of the function block. After completion or abortion of 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 (error)

Data_Type	Default_Value	Range	Unit
BOOL	-	-	-

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

ERNO

Data_Type	Default_Value	Range	Unit
WORD	-	0 … 65535	-

At output ERNO the identifier of an occurred error is provided. It is only valid when DONE and ERR is TRUE, (see, error messages): Error Messages of the Function Block Libraries

DIAG (diagnosis)

Data_Type	Default_Value	Range	Unit
BYTE	-	0 16#01 = 1 -> Watchdog error	-

Output displays the diagnosis message of the DC541. If DIAG is 0, no diagnosis message is available. The following messages are possible:

OV0…OV7 (overload \ C0…C7)

Data_Type	Default_Value	Range	Unit
BOOL	-	-	-

The outputs OV0..OV7 display the current output status of the channels C0…C7. If the respective bit is TRUE, the corresponding output cannot be switched e.g. due to an overload or a short circuit.