Siemens SINAMICS S120 Commissioning Manual page 37

Cycle times of the CU310-2 in the servo control mode
Table 1- 11 Sampling time setting for servo control
Cycle times [µs]
Current Speed controller
controller
125 125
62.5 62.5
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 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 axis
● 75 DCC blocks for 2 ms time slice correspond to 2 U/f axes with 500 μs.
● 50 DCC blocks for 2 ms time slice correspond to 1.5 U/f axes with 500 μs.
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 1- 12 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.
Commissioning Manual
Commissioning Manual, (IH1), 01/2012, 6SL3097-4AF00-0BP2
Number
Axes
1
1
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
Preparation for commissioning
1.5 Rules for wiring with DRIVE-CLiQ
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]
35