Lenze 931E/K Small Drives Control - Manual (Page 96)

Commissioning
Incremental encoder emulation via DOUT1 and DOUT2
Teaching positions
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96 SW−HB 13.0002−EN 4.1
5.7 Incremental encoder emulation via DOUT1 and DOUT2
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Note!
An activated incremental encoder emulation requires the digital outputs
DOUT1 and DOUT2. Since these outputs are connected to the digital inputs
DIN2 and DIN3, the inputs cannot be used when the incremental encoder
emulation is active.
Exception: 931KxK: extra−low voltage devices can only be used as master
(digital frequency output), but not as slave (digital frequency input).
For complex control tasks, two servo positioning controllers can be synchronised by
coupling them in a master/slave configuration via incremental encoder signals. At present,
the 931KxK servo positioning controller can only act as master. The master transmits the
position information in the form of incremental encoder track signals via the outputs
DOUT1 (track signal A) and DOUT2 (track signal B) to the slave which reads the information
via the corresponding incremental encoder input.
Master
X1 out Input
Slave
M1 M2
931e_501
Fig. 17 Configuration for master/slave operation
The master operates in one of the operating modes described before (speed control,
positioning), while the slave is in synchronised mode.
The following applications are possible with this configuration:
ƒ Speed−synchronous traversing
ƒ Position−synchronous traversing
The classical servo applications, speed control in the servo controller and position control
in the control system, also require an actual position feedback from the servo controller to
the control system. This is also done by using the incremental encoder emulation of the
servo positioning controller.
In both cases, the servo inverter as the master emulates the track signals of the incremental
encoder defined by the parameters in the menu Operating mode / Incremental encoder
emulation.
Here you can also deactivate the incremental encoder emulation to use the digital inputs
DIN2 & 3 or the digital outputs DOUT1 & 2 for other functions.
In the Incremental encoder emulation / Incremental input dialog box you can select the
following settings: