Output Description

DONE (done)

Data type: BOOL

Output DONE indicates the state of the job processing. After completing or aborting the processing (due to an error), DONE is set to TRUE for one cycle. For that reason, the 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: BOOL

Output ERR indicates whether an error occurred during 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 (error number)

Data type: WORD

Output ERNO provides an error identifier, if an invalid value was applied to an input or if an error occurred during request 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.

The encoding of the error messages output at ERNO is explained in the chapter Error Messages: Error Messages of the Function Block Libraries

READY (ready)

Data type: BOOL

Output READY=TRUE indicates that the drive is ready to switch on (Bit 0 in the status word from the drive).

OPERATING (operating)

Data type: BOOL

Output OPERATING=TRUE indicates, that the drive is modulating. The drive is enabled and running (Status Word of drive bit: RDY_REF = TRUE).

This indication works, even if the drive is controlled from another control place, e.g. local panel.

Note

This is different to the ACS_DRIVES_CTRL_STANDARD or ACS_DRIVES_CTRL_STANDARD_GEN.

ON_INHIBIT (on is inhibited)

Data type: BOOL

Output ON_INHIBITED=TRUE indicates, that the OnInhibited state is active (Bit 6 in the Status Word from the drive).

This is the case after a fault or an Emergency Off / Coast Stopp (Off2) or an E-stop (Off3) or via digital input “Off2” (10.08) or E Stop (10.09).

AT_SETPOINT (actual value is at setpoint)

Data type: BOOL

Output AT_SETPOINT=TRUE indicates, that the actual value (MotSpeed (1.04)) and the setpoint (SpeedRef4 (2.18)) are in the tolerance zone.

TRIPPED (tripped)

Data type: BOOL

Output TRIPPED=TRUE indicates, that the drive is tripped (Bit 3 in the Status Word from the drive).

ALARM (alarm)

Data type: BOOL

Output ALARM=TRUE indicates, that the drive has an alarm (Bit 7 in the Status Word from the drive).

LOCAL_CTRL (local control)

Data type: BOOL

Output LOCAL_CTRL = TRUE indicates, that the drive is not controlled from remote control e.g. PLC (LOCAL_CTRL = inverted bit 9 in the Status Word from the drive - REMOTE). LOCAL_CTRL might be set to TRUE due to no connection to the drive or the drive was set to local control via the drive panel or a drive configuration tool from PC.

CW (Control Word)

Data type: WORD

Output CW returns the Control Word that was build in the Function Block using the inputs and Status Word according to the ABB Drives Profile state machine.

Connect CW directly to the fieldbus. The CW output will keep it´s value, even if the drive is not controlled from this block anymore. E.g., if local control or EXT2 is enabled.

Note

This is different to the ACS_DRIVES_CTRL_STANDARD or ACS_DRIVES_CTRL_STANDARD_GEN.

MESSAGE (message)

Data type: STRING

Output MESSAGE gives information about the actual state of the Function Block. This string also indicates what would be the next steps to continue to start the drive, or which signal from the drive is missing.