NORD Drivesystems BU0210 User Manual
Page 15
3 Function description
BU 0210 GB
Subject to technical amendments
15
The reference point run can be cancelled by removing the "Enable" signal or by "Emergency Stop" or "Block
Voltage".
ATTENTION
In this case the frequency inverter does not generate an error message.
NOTE:
For further details of possible functionality settings, please refer to the relevant parameter
description in Section 4 Parameter settings.
3.2.1.2
Reset position via digital inputs or BUS I/O In Bits
As an alternative to a reference point run, one of the digital inputs can be programmed to the setting "Reset
Position
" (P420[01]…[04], setting 61). Control via one of the Bus IO Bits is correspondingly identical. In
contrast to the reference point function, the input or the Bus IO Bit is always effective and when the signal
changes immediately sets the actual position from 0 → 1 to 0. If an offset has been parameterised in
parameter P609 "Offset Position", the axis will be displaced by this value. Resetting of the position is carried
out independently from the setting of the "Positioning" in parameter P600. In "Position Setpoint Mode" the
setpoint position /in parameter P610, 2 = Position increment array is set to 0.
The precision of reproducibility of the referencing via Reset Position is not as good as with the reference point
run - as it depends on the tolerance of the reference point switch and the speed with which the switch is
approached. However, the precision achieved is sufficient for many applications. In addition, referencing can
be performed without interrupting the positioning.
The function "Reset Position" can also be realised via a serial interface or the Bus IO In Bits. For this, one of
the bus setpoint values (P546[01]…[03]) must be set to 20 "Bus IO In bits 0..7" and under P480 "Function Bus
I/O In Bits" the function setting 61 must be assigned to the corresponding bit.
NOTE:
For further details of the possible functionality settings, please refer to the relevant parameter
description in the section "Parameter Settings".