Transition Function Of The Position-Control Circuit; Effect Of Machine Data That Defines Response - Siemens SIMATIC S7-300 Manual

Starting up the FM 354
The qualitative effect of the parameters on the positioning process appears in
the following table:
Table 7-5
Quiet running
Noise immunity
Soft movement reversal
Positioning without overshooting
Fast positioning
Optimization of
The following startup actions allow you to optimize the position controller to
dynamic response
your requirements. Check all speed ranges, and if applicable give the greatest
weight in evaluating the results to the speed that is the most significant for
your technology.
Optimization for uniformity of movement
You can make optimization of the position controller considerably easier by
analyzing the actuating signal or drive speed (tachometer voltage) with a
storage oscillograph. The resulting oscillograms for the transition functions
U(t) and v(t), i.e. the oscillation pattern, can be interpreted more easily (see
Figure 7-12).
Fig. 7-12 Transition function of the position-control circuit
7-20

Effect of machine data that defines response

U
v
Effective range of jolt filter
Gain too high (axis swing damping weak)
Amplification/acceleration too great
Amplification/acceleration too small
Optimum setting
MD38 MD40/41
small –
great –
small great
small great
great small
FM 354 Servo Drive Positioning Module
MD42
–
–
great
great
small
t