Siemens SINAMICS S120 Function Manual page 842

Basic information about the drive system
14.12 System rules, sampling times and DRIVE-CLiQ wiring
Vector control/U/f control
● For drives with vector control, a current controller sampling time between 125 µs and 500 µs
can be set (125 µs ≤ p0115[0] ≤ 500 µs). This also applies to operation with U/f control.
● For vector control and vector control, U/f control modes, and when using a sine-wave filter
(p0230 > 0), it is only permissible to change the current controller sampling time of the DO
involved in multiple integer steps of the default value on account of the design of the sine-
wave filter.
● The fastest sampling time of a drive object in vector control mode is obtained as follows:
– T
– T
– T
– T
Note
Restriction of the number of axes for Chassis in vector control
For active edge modulation or optimized pulse patterns and active wobbling, only half the
number of axes is permitted.
Note
Restriction when using Active Line Modules of the Chassis-2 format
If an Active Line Module (ALM) of the Chassis-2 format is driven in a parallel connection
together with VECTOR drives, the sampling times within the Motor Modules must be set to
400 μs. To ensure the ability to set faster sampling times, the ALM must be operated on a
separate CU.
● The fastest sampling time of a drive object in U/f control mode is obtained as follows:
– T
● When vector control is operated together with vector control, U/f control, a maximum of 11
axes is possible (ALM, TB and TM additionally possible).
Safety functions
● Only Single Motor Modules are permissible for servo axes with a current controller sampling
time T
840
= 250 µs: Max. three drive objects in vector control
i
= 375 µs: Max. four drive objects in vector control
i
= 400 µs: Max. five drive objects in vector control
i
= 500 µs: Max. six drive objects in vector control
i
= 500 µs: Max. 12 drive objects in U/f control mode
i
≤ 62.5 μs with the "Safety sensorless" functionality.
IReg
Function Manual, 06/2019, 6SL3097-5AB00-0BP2
Drive functions