ABB 3HAC7681-1

ABB3HAC7681-1

Important 

All control parameters are determined in an optimum way for most actuators during Autoadjust. Changes should only be made when Autoadjust cannot be executed or control stability cannot be achieved. 

The positioner issues an amplified positioning signal for the defined pulse length and with the actuator not moving, in order to achieve accelerated starting of the actuator. This improves the dynamic, in particular, for small setpoint changes. 

To compensate for existing dissymmetries in the controlled system, the go pulse should be set separately for both directions (up/down). 

If the control response consistently overshoots the setpoint, decrease the go pulse. For small and fast actuators, it may be necessary to set the go pulse to 0, even if Autoadjust has determined a higher value.

Important 

The value determined by Autoadjust should not be increased, as this may result in overshooting! 

You can use parameter GOPULSE DN to move the go pulse for adjustment towards 0 %.

3BSE018296R1

DSDI 120AV1 Digital Input Board 32

3BSE018297R1

DSDX 180AK02 DI/DO Module, 32ch

3BSE018298R1

DSDO 115A Digital Output Board 32 Channe

3BSE018311R1

DSTA 171 Connection Unit for Analog

3BSE018405R1

TC513V1 AF100 Twisted pair Coax Modem

3BSE018451R1

CI522AK04 AF 100 Comm. Interface

3BSE018452R1

CI522AK05 AF 100 Interface for Bus

3BSE018453R1

CI522AK06 AF 100 Interface for Bus

3BSE019210R15

TK626V115 Cable assembly

3BSE019210R5

TK626V050 Cable assembly

3BSE019419R1

Label Set S800L, 16ch

3BSE019419R2

Label Set S800L, 8ch

3BSE019999R1

DSRF 197K01 I/O Subrack with single 5V

3BSE020178R1

DSRF 200K01 I/O Subrack with redundant

3BSE020508R1

DI801 Digital Input 24V 16 ch

3BSE020510R1

DO801 Digital Output 24V 16 ch

3BSE020512R1

AI801 Analog Input 8 ch

3BSE020514R1

AO801 Analog output 8 ch