Siemens SINAMICS S120 Function Manual page 475

The ratio for the gearbox used must be parameterized in p9521/p9522 for Safety Integrated
Extended functions and in p2504/p2505 for EPOS. For a gearbox to convert 2 motor
revolutions to 1 load revolution, set p9521 = 1, p9522 = 2, p2504 = 2 and p2505 = 1.
Example 2:
Safety Integrated Extended functions monitors the linear axis using the rotating motor
encoder.
EPOS references using the linear scale.
● p2503 = 100000 => a position of 100000LU (r2521) corresponds to 10 mm (r9708)
● p2503 = 10000 => a position of 10000LU (r2521) corresponds to 10 mm (r9708)
Safety Integrated Extended function uses the rotating motor encoder. The gearbox is
parameterized using p9521/p9522. The spindle pitch is parameterized in p9520. To calculate
the load-side absolute position, EPOS directly uses the load-side linear scale. In this
example, EPOS does not have to take into account the gearbox ratio and spindle pitch.
Example 3:
Safety Integrated Extended functions monitor the linear axis using the rotating motor
encoder. EPOS referenced using the same rotary motor encoder.
● p2506 = 10000, p9520 = 5 mm/revolution => a position of 10000LU (r2521) corresponds
● p2506 = 5000, p9520 = 5 mm/revolution => a position of 10000LU (r2521) corresponds to
Drive functions
Function Manual, (FH1), 01/2013, 6SL3097-4AB00-0BP3
Gear unit
Motor
Encoder
Figure 7-21 Example 2: EPOS and safe referencing_linear
to 5 mm (r9708)
10 mm (r9708)
Gear unit
Motor
Encoder
Figure 7-22 Example 3: EPOS and safe referencing_linear
Function modules
7.8 Basic positioner
473