System Sampling Times And Number Of Controllable Drives - Siemens SINAMICS S120 Commissioning Manual

Preparation for commissioning
1.5 Rules for wiring with DRIVE-CLiQ
1.5.3.1

System sampling times and number of controllable drives

This chapter lists the number of axes that can be operated with a Control Unit. The number
of axes depends on the cycle times and the control mode. The other available remaining
computation times are available for options (e.g. DCC).
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 1- 6 Sampling time setting for servo control
Cycle times [µs]
Current Speed controller
controller
125 125
62.5 62.5
31.25 31.25
2) 2)
1) Valid for TM31 or TM15IO; for TM54F, TM41, TM15, TM17, TM120, TM150 - restrictions are possible dependent on the
set sampling time.
2) In the cycle level 31.25 µs, you can also create the following objects:
- Sensor Module External (SME) and SMC20 that support the current firmware and hardware. These can be recognized
from the Order end number ... 3.
- No additional axis can be operated in this cycle level.
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
32
Number
Axes
6 1 [250 μs]
3 1 [250 μs]
1 1 [250 μs]
Motor / dir.
measuring
Infeed
systems
6 / 6
3 / 3
1 / 1
Commissioning Manual, (IH1), 01/2012, 6SL3097-4AF00-0BP2
TM / TB
1)
3 [2000 μs]
3 [2000 μs]
3 [2000 μs]
Commissioning Manual