Notes On The Number Of Controllable Drives - Siemens Sinamics S120 Function Manual

Basic information about the drive system
12.12 System sampling times and number of controllable drives
For p0092 = 1, the sampling times are pre-assigned so that isochronous operation together
with a control is possible. If isochronous operation is not possible due to incorrect sampling
time settings, then an appropriate message is output (A01223, A01224). Before the
automatic configuration, parameter p0092 must be set to "1" in order that the sampling times
are appropriately pre-set.
Note
Any change to the preset sampling times should only be performed by experts.
12.12.1

Notes on the number of controllable drives

The number and type of controlled axes and the extra activated functions of the project 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 configuration tool is recommended. The SIZER
calculates the feasibility of the project.
The maximum possible functionality depends on the performance of the Control Unit used
and the components configured.
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 12- 17 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.
764
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
Function Manual, (FH1), 01/2012, 6SL3097-4AB00-0BP2
TM / TB
1)
3 [2000 μs]
3 [2000 μs]
3 [2000 μs]
Drive functions