ABB 3HNA000512-001

ABB3HNA000512-001

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 "offset for the output signal" linearizes the response of the I/P module used and enables fast control even for small control deviations. 

The value is limited a the low end by a minimum value (neutral zone) The offset substantially affects the controlling speed for control deviations smaller than 5 %. 

In manual modes MANUAL and MAN_SENS, the offset values are issued to the I/P module for fine adjustment. For larger, slower actuators Autoadjust may determine values higher than 80%. In these cases there will be no noticeable difference between fine and coarse adjustment while in manual mode. 

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

For most actuators, a satisfactory control response is achieved with offset values in the 40 ... 80 % range. If the control stability for setpoint changes is less than 2% overshoot, both offset values should be decreased. 

Both offset values should be increased when the actuator stops outside the tolerance band. 

You can use parameter Y-OFS DN to adjust the Y offset for the positioning direction down (towards 0 %).

3BSE008536R1

TB806 Bus Inlet

3BSE008538R1

TB807 Modulebus terminator

3BSE008544R1

AI820 Analog Input 4 ch

3BSE008546R1

AO820 Analog Output 4 ch

3BSE008550R1

DI821 Digital Input 230V 8 ch

3BSE008552R1

DI811 Digital Input 48V 16 ch

3BSE008560R1

TB810 Modulebus Optical Port

3BSE008568R1

TB811 Modulebus Optical Port

3BSE008572R1

TU838 Extended MTU, 50V

3BSE009616R1

TC505K03 Connection Kit 150 Ohm, with

3BSE013204R1

TB815 Interconnection Unit

3BSE013208R1

TB820V2 Modulebus Cluster Modem

3BSE013230R1

TU810V1 Compact MTU, 50V

3BSE013231R1

TU811V1 Compact MTU, 250V

3BSE013232R1

TU812V1 Compact MTU, 50V, D-sub

3BSE013233R1

TU814V1 Compact MTU, 50V, snap-in con.

3BSE013234R1

TU830V1 Extended MTU, 50V

3BSE013235R1

TU831V1 Extended MTU, 250V