Notes On The Number Of Controllable Drives; System Sampling Times And Number Of Controllable Drives - Siemens SINAMICS S120 Commissioning Manual

1.5.4

Notes on the number of controllable drives

The number and type of controlled axes and the additionally activated functions can be
scaled by configuring the firmware. Especially for demanding configurations, drives with high
dynamics or a large number of axes with additional utilization of special functions for
example, a check using the SIZER engineering tool is recommended. The SIZER
engineering tool calculates the feasibility of the project.
The maximum possible functionality depends on the performance of the Control Unit used
and the components configured.
1.5.4.1

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- 5 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.
•
Commissioning Manual
Commissioning Manual, (IH1), 01/2013, 6SL3097-4AF00-0BP3
Number
Axes
6
3
1
2)
1.5 Rules for wiring with DRIVE-CLiQ
Motor / dir.
measuring
Infeed
systems
1 [250 μs] 6 / 6
1 [250 μs] 3 / 3
1 [250 μs] 1 / 1
Preparation for commissioning
TM /TB
1)
3 [2000 μs]
3 [2000 μs]
3 [2000 μs]
35