Measuring Gear - Siemens Sinamics S120 Function Manual

Basic functions
6.20 Position tracking
● Encoder pulses per revolution (p0408)
● Fine resolution per revolution (p0419)
● Number of resolvable revolutions of the rotary absolute encoder (p0421), this value is
When position tracking (p0411.0 = 1) is activated, the encoder position actual value r0483 is
composed as follows:
● Encoder pulses per revolution (p0408)
● Fine resolution per revolution (p0419)
● Virtual number of resolvable motor revolutions of a rotary absolute encoder (p0412)
● Gearbox ratio (p0433/p0432)
6.20.2

Measuring gear

Features
● Configuration via p0411
● Virtual multiturn via p0412
● Tolerance window for monitoring the position at power ON p0413
● Input of the measuring gear via p0432 and p0433
● Display via r0483
Description
If a mechanical gear (measuring gear) is located between an endlessly rotating motor/load
and the encoder and position control is to be carried out using this absolute encoder, an
offset occurs (depending on the gear ratio) between the zero position of the encoder and the
motor/load whenever encoder overflow occurs.
Figure 6-14
294
fixed at "1" for singleturn encoders.
If the measuring gear is absent (n=1), the actual number of the stored revolutions of a
rotary absolute encoder p0421 is used. The position area can be extended by increasing
this value.
If the measuring gear is available, this value equals the number of resolvable motor
revolutions, which is stored in r0483.
Measuring gearbox
Function Manual, (FH1), 01/2012, 6SL3097-4AB00-0BP2
Drive functions