Siemens Sinamics S120 Function Manual page 769

Cycle times of the CU310-2 in the servo control mode
Table 12- 22 Sampling time setting for servo control
Cycle times [µs]
Current Speed controller
controller
125 125
62,5 62,5
31,25 31,25
2) 2)
125 125
62,5 62,5
31,25 31,25
2) 2)
1) Valid for TM15, TM17 or TM41; for TM54F, TM31, TM120, TM150 - restrictions are possible dependent on the set
sampling time.
2) In the cycle level 31.25 µs, you can also create the following objects:
- Sensor Module External (SME) and SMC20 that support the current firmware and hardware. These can be recognized by
the end of the order number ... 3.
3) DQ = DRIVE-CLiQ
A CU310-2 can only have a clock cycle level of 31.25 µs in conjunction with one Motor
Module connected via the X100 DRIVE-CLiQ port. In this application it is not permissible that
the Control Unit is snapped onto the power unit.
If the 310-2 Control Unit is snapped onto 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.
Drive functions
Function Manual, (FH1), 01/2012, 6SL3097-4AB00-0BP2
Number
Axes
1
1
1
1
1
1
with 125 μs that can be omitted/eliminated (≙ 2 U/f axes with 500 μs).
12.12 System sampling times and number of controllable drives
Via DQ
Infeed Motor Module
- -
- -
- -
1 [250 μs] 1
1 [250 μs] 1
1 [250 μs] 1
Basic information about the drive system
Snapped-on
3)
Power Module
1
1
1
-
-
-
TM / TB
1)
3 [2000 μs]
3 [2000 μs]
3 [2000 μs]
3 [2000 μs]
3 [2000 μs]
3 [2000 μs]
767