Siemens Sinamics S120 Function Manual page 767

The following combinations are permissible for current controller cycle mixed operation:
● Servo with 125 µs and servo with 250 µs (max. 2 clock cycle levels can be mixed)
● Servo with 62.5 µs and servo with 125 µs (max. 2 clock cycle levels can be mixed)
Note the following: 1 axis with 31.25 µs corresponds to
● 2 servo axes with 62.5 µs
● 4 servo axes with 125 µs
● 8 U/f axes with 500 µs
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 12- 18 Sampling time setting for vector control
Cycle times [µs]
Current Speed controller
controller
500 µs 2000 µs
400 µs 1600 µs
3)
250 µs 1000 µs
1) Valid for TM31 or TM15IO; for TM54F, TM41, TM15, TM17, TM120, TM150 - restrictions are possible dependent on the
set sampling time.
2) For power units in chassis format, the infeed cycle depends on the power rating of the module and can assume values
of 400 μs, 375 μs or 250 μs.
3) This setting results in lower remaining computation times.
In closed-loop vector control, current controller cycles can be mixed with 250 µs and 500 µs.
NOTICE
Restriction for the chassis format
If edge modulation and wobbling are activated simultaneously with p1802 ≥ 7 and p1810.2
= 1 respectively, the quantity structure for vector control is halved. Then a maximum of 3
axes at a current control cycle of 500 µs, 2 axes at 400 µs or 1 axis at 250 µs are
permissible.
Drive functions
Function Manual, (FH1), 01/2012, 6SL3097-4AB00-0BP2
12.12 System sampling times and number of controllable drives
Number
Axes
6 1 [250 μs]
5 1 [250 μs]
3 1 [250 μs]
Basic information about the drive system
Motor / dir.
measuring
Infeed
2)
systems
6 / 6
5 / 5
3 / 3
TM / TB
1)
3 [2000 μs]
3 [2000 μs]
3 [2000 μs]
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