Siemens SIMATIC FM 453 Manual page 166

Starting up the FM 453
7.3.6 Startup of the Position Controller
Overview
By feeding back the measured displacement, a position controller closes the
outermost loop of a controller cascade with the following structure:
FM 453
CL
Ref.
controller
position
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
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."
7-24
Drive
Speed
regulator
Non-release control
Speed assignment of servo drive
Positioning
Current
regulator
Actual position
FM 453 Servo Drive / Step Drive Positioning Module
C79000-G7076-C453-01
Motor and
Machine
M
Tacho
Encoder