6. Setting Parameters
Festo P.BE-CMMP-CO-SW-EN 0708NH
59
6.3
Conversion Factors (Factor Group)
6.3.1
Overview
Motor controllers are used in a number of applications: As direct drive, with follow-on
gear, for linear drive, etc. To permit easy parameter setting, the motor controller can be
parameterised with the help of the factor group so that the user can specify or read out all
variables, such as speed, directly in the desired units at the output (e.g. with a linear axis
position value in millimetres and speeds in millimetres per second). The motor controller
then converts the entries into its internal units with the help of the factor group. For each
physical variable, (position, speed and acceleration), there is a conversion factor available
to adapt the user units to the own application. The units set through the factor group are
generally designated
position_units
,
speed_units
or
acceleration_units
. The following
sketch illustrates the function of the factor group:
Fig. 6.2: Factor group
All parameters are stored in the motor controller in its internal units and only converted
with the help of the factor group when being written in or read out.
For that reason, the factor group should be set before the first parameter setting and not
changed during parameter setting.
Summary of Contents for CMMP Series
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