Siemens SINAMICS S120 Function Manual page 1027

Cycle times for vector control
This following table lists the number of axes that can be operated with a Control Unit in the
vector control mode. The number of axes is also dependent on the cycle times of the
controller:
Table 13- 15 Sampling time setting for vector control
Cycle times [µs]
Current con- Speed controller
troller
500 µs 2000 µs
400 µs 1600 µs
3)
250 µs 1000 µs
Valid for TM31 or TM15IO; restrictions are possible for TM54F, TM41, TM15, TM17, TM120, TM150 depending on the
1)
set sampling time.
For power units in chassis format, the infeed cycle depends on the power rating of the module and can be 400 μs, 375
2)
μs or 250 μs.
This setting results in lower remaining computation times.
3)
Adjustable pulse frequencies and current controller sampling times for vector control
The pulse frequencies that can be set depending on the selected current controller sampling
time are shown in r0114.
This means that maximum 2 cycle levels can be mixed.
Note
Clock cycle mix
Detailed information about the clock cycle mix for servo control is provided in Section Cycle
mix for servo control and vector control (Page 1031).
Drive functions
Function Manual, 11/2017, 6SL3097-4AB00-0BP5
13.12 System rules, sampling times and DRIVE-CLiQ wiring
Number
Axes Infeed
2)
6 1 [250 μs]
5 1 [250 μs]
3 1 [250 μs]
Basic information about the drive system
Motor/dir. measur-
ing systems
6 / 6
5/5
3 / 3
TM /TB
1)
3 [2000 μs]
3 [2000 μs]
3 [2000 μs]
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