Siemens SINAMICS S120, Function Manual

Page: 1030 / 1094

Basic information about the drive system
13.12 System rules, sampling times and DRIVE-CLiQ wiring
Drive functions
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Function Manual, 11/2017, 6SL3097-4AB00-0BP5
Mixed operation of vector control and V/f open-loop control
In mixed operation with vector control and V/f control, one axis in vector control at 250 µs
uses exactly as much computing power as two axes in V/f control at 500 µs. In conjunction
with vector control, a maximum of 11 axes are permitted (1 vector control plus 10 V/f
control).
Table 13- 19 Number of axes for mixed vector control operation
Number of axes in vector control Number of axes in V/f control
6 500 µs 3 250 µs 0 -
5 500 µs - - 2 500 µs
4 500 µs 2 250 µs 4 500 µs
3 500 µs - - 6 500 µs
2 500 µs 1 250 µs 8 500 µs
1 500 µs - - 10 500 µs
0 - 0 - 12 500 µs
Cycle times of the CU310-2 in the servo control mode
Table 13- 20 Sampling time setting for servo control
Cycle times [µs] Number Via DQ
2)
Snapped-on TM
1)
/TB
Current con-
troller
Speed controller Axes Infeed Motor Module Power Module
125 125 1 - - 1 3 [2000 μs]
62.5 62.5 1 - - 1 3 [2000 μs]
1)
Valid for TM15, TM17 or TM41; for TM54F, TM31, TM120, TM150 - restrictions are possible dependent on the set
sampling time.
2)
DQ = DRIVE-CLiQ
If the 310-2 Control Unit is snapped on to a PM340 or a PM240-2 FS A-C, a minimum
current controller sampling time of 62.5 µs is possible. For PM240-2 FS D-F the minimum
current controller sampling time is 125 µs.
Using DCC
The available remaining computation time can be used for DCC. In this case, the following
supplementary conditions apply:
● For a 2 ms time slice, a max. of 75 DCC blocks can be configured for each servo control
axis with 125 μs that can be omitted/eliminated (≙ 2 V/f axes with 500 μs).
● 50 DCC blocks for 2 ms time slice correspond to 1.5 V/f axes with 500 μs.
Detailed information about handling and using DCC standard blocks is provided in the
"SINAMICS/SIMOTION Editor Description DCC" manual.