Beckhoff AX5000 Series Function Manual

Position offset
Function description 67
Version: 1.5
15 Position offset
Note
Terminology
In this documentation, the term offset tends to be used to describe the function of the
position offset.
An offset can be configured if an absolute encoder is used in the AX5000. The value can be stored in the
motor encoder, in the AX5000 or in the startup list. The offset is taken into account when the AX5000 starts
up. It is added to the absolute encoder position. The result is reported to the higher-level controller as an
actual value.
In contrast to the offset stored in the TwinCAT NC, the offset stored in the AX5000 or in the encoder can also
be modified and stored from the PLC (see procedure described below).
Parameters involved
The meaning of the parameters in relation to the offset is explained in the following sections.
Note
Reference values of the position offset
S-0-0051; P-0-0159, P-0-0271; P-0-0272; P-0-0273; P-0-0274; P-0-0275; P-0-0278
Prerequisites
The AX5000 requires firmware v2.06 build 8 or higher. For positioning, an absolute encoder must be
connected to the AX5000. The offset can also be used with a single-turn encoder or a resolver, which use an
absolute counting method within a revolution.
Procedure
A PLC function block is available in the library
TC2_MC2_Drive
under TwinCAT 3 for saving or modifying the offset
from a user program:
The description of this PLC function block can be
found in the Beckhoff Online Infosys, for example.
The offset is stored in increments. The TC Drive
Manager should therefore be used for entering or
modifying the offset without a PLC program. It deals
with the conversion between user units and
increments. The following page becomes active, if the
AX5000 is linked with an NC axis:
It shows settings from the NC (1) and whether an
offset is already active (2). To save a new offset,
enter the value in user units and select the storage
location (3). Use the "Activate" button (4) to store and
enable the offset. The "Activate" function can only be
executed if the axis is not in controlling mode.

Beckhoff AX5000 Series Specifications

General

Brand	Beckhoff
Model	AX5000 Series
Category	Servo Drives
Language	English