Enable Logic - Siemens SINAMICS S120 Commissioning Manual

360° are travelled per load revolution. According to the encoder resolution, maximum
364,544 LU/360° = 1012 LU/° 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 / 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
5.7.3.11

Enable logic

Overview
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.
Interconnecting signal sources
To interconnect a signal sources, proceed as follows:
1. Connect the signal source for the "Infeed operation" (p0864) command.
2. Interconnect the signal source for command "OFF1 (low active)" (p0840).
This command corresponds to control word 1 bit 1 (STW1.1) in the PROFIdrive profile.
3. Connect the 1st signal source for the "OFF2 (low active) signal source 1" command (p0844).
This command corresponds to control word 1 bit 1 (STW1.1) in the PROFIdrive profile.
Commissioning with Startdrive
Commissioning Manual, 06/2020, 6SL3097-5AA10-0BP2
5.7 Basic parameterization of the drive objects
Commissioning
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