Siemens SIMATIC FM 453, Manual

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FM 453 Servo Drive / Step Drive Positioning Module
C79000-G7076-C453-01
7.3.6 Startup of the Position Controller
By feeding back the measured displacement, a position controller closes the
outermost loop of a controller cascade with the following structure:
CL
controller
Speed
regulator Current
regulator
Drive
FM 453
Ref.
position
Actual position
Tacho
Encoder
Motor and
Machine
M
Fig. 7-11 Position Control Circuit with Servo Drive
With the following startup steps, you verify the basic functional capability of
the position control. Optimization, in accordance with your technological
criteria, is described in Section 7.3.7.
First check the basic functions
S
Non-release control
S
Speed assignment of servo drive
S
Positioning
Special case:
In the control mode “Step drive in position control circuit” (MD61 = 1) with-
out an encoder, the position control circuit is closed within the FM 453. The
step drive itself is operated via open-loop control. The following tests are
only partially relevant. Please refer to the associated notes.
Note
Always be sure to put MD modifications into effect with “Activate machine
data.”
Overview
Starting up the FM 453