Enable Logic - Siemens SINAMICS S120 Commissioning Manual

Example 2: Rotary axis (encoder on the motor side)
Gear ratio i = 44.5
● p2504 = 445 motor revolutions
● p2505 = 10 load revolutions
Target variable to be controlled: °
Encoder resolution = 364,544 LU
360° are travelled per load revolution. According to the encoder resolution, maximum
364,544 LU/360° = 1012 LU per ° can be defined. We will select 100 LU per ° (1 LU = 0.01°).
360° per revolution results in 36,000 LU per load revolution.
● p2506 = 36,000 LU per load revolution
Example 3: Modulo axis – chain drive
The chain has 250 chain links and a chain link is 0.0338667344 m long. The output wheel
has 40 teeth, i.e. 40 chain links are moved per revolution. The target positions are at a
distance of 25 chain links to one another.
Gear ratio i = 114.28 (rounded off)
Ratio of the number of teeth of the gearbox = 106,967/936
● p2504 = 106,967 motor revolutions
● p2505 = 936 load revolutions
Encoder resolution = 468,095 LU
The encoder resolution is too low here to convert the chain links to a linear SI unit without
rounding-off errors having an effect on the modulo correction. A chain link must therefore be
taken as target variable.
Target variable to be controlled: 1 chain link
40 chain links travelled per load revolution. According to the encoder resolution, maximum
468,095 LU/40 chain links = 11,702 LU per chain link can be selected. We will therefore
select 1,000 LU per chain link (1 LU = 33.8667344 µm). 40 chain links per revolution results
in:
● p2506 = 40,000 LU per load revolution
● p2576 = 250,000 LU modulo range
4.8.3.10

Enable logic

☐
If, when commissioning, you interconnected telegrams, then these interconnections are
displayed in the "Enable logic" screen form. Further specification is not required.
If, when commissioning, you did not specify any telegram types, then you must interconnect
the required signal sources in the "Enable logic" screen form.
Commissioning with Startdrive
Commissioning Manual, 12/2018, 6SL3097-5AA10-0BP0
"Drive axis > Parameters > Basic parameterization > Enable logic"
4.8 Basic parameterization of the drive objects
Commissioning
187