Notes On The Number Of Controllable Drives; Introduction; Number Of Controllable Drives - Siemens SINAMICS S120 Commissioning Manual

Preparations for Commissioning
1.5 Rules for wiring with DRIVE-CLiQ
Figure 1-13 Sample vector U/f topology
1.5.8

Notes on the number of controllable drives

1.5.8.1

Introduction

The number and type of controlled drives and the extra activated functions on a Control Unit
can be scaled by configuring the firmware. The maximum possible functionality depends on
the computing power of the Control Unit used and may be checked in each case using the
SIZER projecting tool.
1.5.8.2

Number of controllable drives

The following specifications provide a rough guide to the potential drive numbers for each
Control Unit CU320 as a function of the current and speed controller clock cycles and the
sampling times of the frequency/voltage channels with vector V/f.
Servo control
● Servo without extra function modules (e.g. setpoint channel):
36
PROFIBUS-DP cycle >=1 ms
– 6 drives (sampling times: current controller 125 µs / speed controller 125 µs), of which
max. 2 induction motors or
2 drives (sampling times: current controller 62.5 µs / speed controller 62.5 µs), both
also induction motors
Commissioning Manual, (IH1), 07/2007 Edition, 6SL3097-2AF00-0BP7
Commissioning