Lenze 931W - Manual (Page 38)

Software implementation and parameter setting
System menu
Display units
5
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38 HB 13.0001-EN 3.0
5.4.2 Display units
The unit for the time can be selected in minutes or seconds; the position can be specified
in increments, revolutions, angular degree, angular minutes, angular seconds, or in m, dm,
cm, mm, mm. All other parameters of the software are adapted to the units that are set.
5.4.3 Positive direction: right/left
In this function, apart from the orientation of the linear axis / rotary axis, also the position
values for the limit switches are changed.
5.4.4 Modulo rotary axis
For rotary table applications, this field can be selected. After the selection has been
effected, this operating mode is activated in the ”Travel data sets” menu and can be
selected.
5.4.5 Software limit switch
Irrespective of the hardware limit switches, additional software limit switches can be
defined, whereby according to the direction orientation of the linear or rotary axis
reasonable values have to be defined for left/right (e.g. positive left direction meaning:
position value for the left > position value for the right!). If the direction orientation is
changed, also the values for the limit switches have to be altered, as otherwise faults can
occur.
Example:
At the effort of trying to start a reference run in a linear system, the fault message ”System
parameters” occurs immediately. Although ”Direction positive/left” has been set, the
position value for the right software limit switch was set higher than that for the left one.
Therefore, due to incorrectly set system parameters, it is not possible to approach the
software limit switch correctly in the correct direction. For error correction, the position
value for the left software limit switch has to be set higher than that for the right switch
in the ”System” menu.
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Note!
The software limit switches can only be used in the controller types ”absolute
position” or ”relative position”.
5.4.6 Offset reference
The ”Reference” offset effectuates a zero shift of the home position (standard value 0) by
the position value entered here. A change of the reference offset only is accepted after a
new reference run. Thereby, if required, the position of the software limit switches is to be
checked again. The function of the home position in this connection remains unaffected
by the reference offset.