Lenze 931K - Manual (Page 72)

Parameter setting
Conversion factors (factor group)
Overview
7
l
72 KHB 13.0002−EN 4.1
7.2 Conversion factors (factor group)
7.2.1 Overview
Drive controllers are used in numerous applications, for instance as direct drives, with
downstream gearboxes, for linear drives, etc.
To enable simple parameterisation for all these different applications, the drive controller
can, by means of the factory group, be parameterised in such a way that the user can enter
or read out all quantities (e.g. the speed) directly on the drive in the units desired (e.g.
position values in millimetres and speeds in millimetres per second in the case of a linear
axis).
The drive controller then converts the entries to internal units by means of the factor group.
For every physical quantity (position, speed and acceleration) there is a conversion factor
for adapting the user units to the own application.
The units set by the factor group are generally designated as positions_units, speed_units
or acceleration_units.
The below diagram illustrates the function of the factor group.
Factor Group
position_units
speed_units
acceleration_units
position_factor position_polarity_flag
velocity_polarity_flag velocity_encoder_factor
acceleration_factor
increments (inc)
1 rpm
1 rpm/256s
±1
±1
±1
±1
0 2
3
4
1
931e_414
Fig. 10 Factor group
0 User units
1 Controller−internal units
2 Position
3 Speed
4 Acceleration