Rules On The Sampling Times; Rules When Setting The Sampling Times - Siemens SINAMICS S120 Commissioning Manual

Appendix
A.5 System rules, sampling times and DRIVE-CLiQ wiring
The following applies to parallel connection of Line Modules:
● Parallel connection is permissible for Infeed Modules in the chassis format and for Active
Line Modules (ALM) from the 120 kW performance class for the booksize format.
● A maximum of four Infeed Modules are permissible within a parallel connection.
● In booksize format, a maximum of two Active Line Modules (ALM) from the 120 kW
performance class are permissible within a parallel connection.
● The operation of Infeed Modules with different performance values is not permissible
within a parallel connection.
● An active Voltage Sensing Module (VSM) must be assigned to each Active Line Module
(ALM) in the parallel connection. A violation of this rule causes alarm F05061 to be
issued.
● When using Smart Line Modules (SLM) an active Voltage Sensing Module (VSM) must
be assigned to at least one Smart Line Module (SLM) in the parallel connection. A
violation of this rule causes fault F05061 to be issued.
Terminal Modules
Control Unit CU320-2:
● In total a maximum of 16 drive objects of the types TM15, TM31, TM41, TM120 or TM150
can be operated concurrently.
A.5.3

Rules on the sampling times

A.5.3.1

Rules when setting the sampling times

The following rules apply when setting the sampling times:
General rules
● There are a maximum 2 possible cycle levels on the Control Unit, where the lowest
sampling times are not integer multiples with respect to one another. All sampling times
set must be an integer multiple of the smallest sampling time from one of these two cycle
levels.
This setting is permissible.
Additional sampling times must be integer multiples of 250 µs or 455 µs.
Terminal Modules, Terminal Board, Control Unit
● For the digital and analog inputs/outputs of these components the minimum sampling
time (p0799, p4099, p0115) set must be 125 µs.
Pulse frequencies and current controller sampling times:
● The current controller sampling times of the drives and infeeds must be synchronous to
the set pulse frequency of the power unit (see also p1800 in the SINAMICS S120/S150
Lists Manual). Any increase in the pulse frequency requires a reduction in the sampling
times and increases the derating in the power unit.
394
Commissioning with Startdrive
Commissioning Manual, 11/2017, 6SL3097-4AA10-0BP1