Siemens SINAMICS S120 Function Manual page 914

Basic information about the drive system
12.12 System sampling times and number of controllable drives
Cycle times of the CU310-2 in the servo control mode
Table 12- 19 Sampling time setting for servo control
Cycle times [µs]
Current Speed controller
controller
125 125
62,5 62,5
Valid for TM15, TM17 or TM41; for TM54F, TM31, TM120, TM150 - restrictions are possible dependent on the set
1)
sampling time.
DQ = DRIVE-CLiQ
2)
If the 310-2 Control Unit is snapped on to a PM340 Power Module, a minimum current
controller clock cycle of 62.5 µs is possible.
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
● 50 DCC blocks for 2 ms time slice correspond to 1.5 U/f axes with 500 μs.
Detailed information about handling and using DCC standard blocks is provided in the
"SINAMICS/SIMOTION Editor description DCC" manual.
Using EPOS
The following table lists the number of axes that can be operated with a SINAMICS S120
when using a basic positioning system (EPOS). The number of axes is dependent on the
current controller clock cycle.
Table 12- 20 Sampling times when using EPOS
Cycle times [µs]
Current controller Speed controller
250
250
125
The CPU processing time required for the function module EPOS (with 1 ms position
controller/4 ms positioner) corresponds to the same CPU processing time of 0.5 U/f axes
with 500 μs.
912
Number
Axes
1
1
axis with 125 μs that can be omitted/eliminated (≙ 2 U/f axes with 500 μs).
Position controller
250
250
125
Via DQ
Infeed Motor Module
-
-
Cycle times [ms]
Positioner
2 8
1 4
1 4
Function Manual, (FH1), 01/2013, 6SL3097-4AB00-0BP3
Snapped-on
2)
Power Module
- 1
- 1
Number
Axes
6
5
4
TM /TB
1)
3 [2000 μs]
3 [2000 μs]
Infeed
1 [250 μs]
1 [250 μs]
1 [250 μs]
Drive functions