Lenze 931W - Manual (Page 59)

Software implementation and parameter setting
Reference menu
Absolute resolver position
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59 HB 13.0001-EN 3.0
5.8 Reference menu
On the ”Reference” menu page, the type of reference run, the travel profile (velocity and
torque) and the starting time of the reference run can be defined. The different settings are
described in the following.
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5.8.1 Absolute resolver position
If a reference run is carried out on a limit switch, a reference switch, or an edge, referencing
can be effected
ƒ directly to the edge of the respective reference signal, or
ƒ under evaluation of the zero pulse of the resolver
The definition of the exact home position is determined by the absolute resolver position.
In this connection, the absolute resolver position can adopt the following values:
– ”-1”: Referencing is carried out directly to the edge of the reference signal selected.
– ”0-4095”: In addition to the reference signal, the zero pulse of the encoder system
featuring the shortest distance to the edge of the reference signal is evaluated at
the same time.
The integration of the zero pulse of the encoder system is recommended for applications
where the reference signal due to variable ambient conditions (temperature, pressure,
etc.) displays a certain leakage or a tolerance range. This expresses itself in the form of a
range in which the reference signal - according to temperature and other ambient
conditions - can temporarily be measured as a high as well as a low signal. In order to
provide for a definite, repeatable home position, the zero pulse of the encoder system can
be included.