6 Applications
6.3.4
Position-synchronous operation
The BL 4100-C servo drives can be used in a master-slave configuration, hereinafter
referred to as "synchronisation". The servo drives can be a master or a slave. If the servo
drive is the master, it can provide the slave with its current rotor position via the
incremental encoder output.
With this information, the slave can determine the current position and/or speed of the
master via the incremental encoder input.
The synchronisation can be activated/deactivated via
communication interfaces
or
digital
inputs
.
In purely position-synchronous operation, the position setpoint is taken directly from the
encoder interface that has been selected for the synchronisation. The synchronous speed
is used as a speed feedforward control value for the speed controller (speed setpoint).
To set up the purely position-synchronous operation, select the option
Synchronised
in the
field
Synchronisation
of the command window.
Positioning
must be selected as the
operating mode.
6.3.5
Special considerations concerning the resolution of
the master frequency
In most cases, the setting for the resolution of the incremental signal must be
comparatively small as there may be problems with the transmission of the digital signals
if the frequency is too high. In addition, the maximum frequency must be smaller than the
maximum input frequency of the incremental input.
This results in a high quantisation of the synchronous speed. This, in turn, leads to
pronounced setpoint noise which can be heard in the drive. This influence can be reduced
with a corresponding filter.
This filter can be configured under
Parameters/Controller parameters/Speed controller
on
the
Filter
tab.
Product manual BL 4000-C
Page 107 of 298
