Siemens SINAMICS S120 Function Manual page 841

Pulse frequencies and current controller sampling times:
● The current controller sampling times of the drives and infeeds must be synchronous with
the set pulse frequency of the power unit (see also p1800 in the SINAMICS S120/S150 Lists
Manual). Increasing the current controller cycle time in an integer ratio that is not equal to
the configured pulse frequency requires reducing the sampling times.
Line Modules
● For Active Line Modules (ALM) and Smart Line Modules (SLM) in Booksize format the only
current controller sampling time which can be set is 125 µs or 250 µs.
● For Active Line Modules (ALM) and Smart Line Modules (SLM) in Chassis format the
permitted current controller sampling time depends on the relevant module. The current
controller sampling time can either only be set to 250 µs or the current controller sampling
time selected can be 400 µs or 375 µs (375 µs for p0092 = 1).
● For Basic Line Modules (BLM) the only current controller sampling time which can be set is
2000 µs (Chassis format) or 250 µs (Booksize format).
Motor Modules
● For Single Motor Modules in Booksize format, a current controller sampling time of minimum
31.25 µs can be set (31.25 µs ≤ p0115[0] ≤ 500 µs).
● For Double Motor Modules in Booksize format, a current controller sampling time of
minimum 62.5 µs can be set (62.5 µs ≤ p0115[0] ≤ 500 µs).
● For Motor Modules in Chassis format, a current controller sampling time of minimum 125 µs
can be set (125 µs ≤ p0115[0] ≤ 500 µs).
● For Motor Modules in Blocksize format, a current controller sampling time of 62.5 µs, 125 µs,
250 µs or 500 µs can be set (only pulse frequencies in multiples of 2 kHz are permissible).
For PM240‑2 FS D-F the minimum current controller sampling time is 125 µs.
● For the HLA module, a current controller sampling time of minimum 62.5 µs can be set (62.5
µs ≤ p0115[0] ≤ 250 µs).
Servo control/HLA closed-loop control
● For drives, a current controller sampling time between 31.25 µs and 250 µs can be set
(31.25 µs ≤ p0115[0] ≤ 250 µs).
● For drives with HLA modules, a current controller sampling time between 62.5 µs and 250 µs
can be set (62.5 µs ≤ p0115[0] ≤ 250 µs).
● The fastest sampling time for a drive object in servo control or HLA is as follows:
– T
– T
– T
Drive functions
Function Manual, 06/2019, 6SL3097-5AB00-0BP2
= 31.25 µs: Exactly one drive object in servo control
i
= 62.5 µs: Max. three drive objects in servo control or HLA
i
= 125 µs: Max. six drive objects in servo control or HLA
i
Basic information about the drive system
14.12 System rules, sampling times and DRIVE-CLiQ wiring
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