Siemens SINAMICS S120 Function Manual page 911

Cycle times for servo control
This following table lists the number of axes that can be operated with a Control Unit in the
servo control mode. The number of axes is also dependent on the cycle times of the
controller:
Table 12- 14 Sampling time setting for servo control
Cycle times [µs]
Current Speed controller
controller
125 125
62,5 62,5
31,25 31,25
2)
Valid for TM31 or TM15IO; for TM54F, TM41, TM15, TM17, TM120, TM150 - restrictions are possible dependent on the
1)
set sampling time.
At the 31.25 µs cycle level you can additionally setup the following objects:
2)
Sensor Module External (SME) and the SMC20 supported with the current firmware and hardware. These can be
•
identified by the final digit of the order number ... 3.
No additional axis can be operated at this cycle level.
•
The following combinations are permissible for current controller cycle mixed operation:
● Servo control with 125 µs and servo control with 250 µs (max. 2 clock cycle levels can be
● Servo control with 62.5 µs and servo control with 125 µs (max. 2 clock cycle levels can be
Note the following: 1 axis with 31.25 µs corresponds to
● 2 servo control axes with 62.5 µs
● 4 servo control axes with 125 µs
● 8 U/f control axes with 500 µs
Drive functions
Function Manual, (FH1), 01/2013, 6SL3097-4AB00-0BP3
Axes
6
3
1
2)
mixed)
mixed)
12.12 System sampling times and number of controllable drives
Number
Infeed
1 [250 μs]
1 [250 μs]
1 [250 μs]
Basic information about the drive system
Motor / dir.
measuring
systems
6 / 6
3 / 3
1 / 1
TM /TB
1)
3 [2000 μs]
3 [2000 μs]
3 [2000 μs]
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