Siemens Sinamics s120 Commissioning Manual page 63

Cycle times of the CU310-2 in the servo control mode
Table 2- 15 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 or a PM240-2 FS A-C, a minimum
current controller clock cycle of 62.5 µs is possible. For PM240-2 FS D-F the minimum
current controller clock cycle 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.
Using EPOS
The following table lists the number of axes that can be operated with a SINAMICS S120
when using a "basic positioner" (EPOS) function module. The number of axes is dependent
on the current controller clock cycle.
Table 2- 16 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 V/f axes
with 500 μs.
STARTER Commissioning Manual
Commissioning Manual, (IH1), 07/2016, 6SL3097-4AF00-0BP5
Number
Axes
1
1
Cycle times [ms]
Position controller
250 2
250 1
125 1
2.5 System rules, sampling times and DRIVE-CLiQ wiring
Via DQ
2)
Infeed Motor Module
- -
- -
Positioner
8
4
4
Preparation for commissioning
Snapped-on TM
1)
Power Module
1 3 [2000 μs]
1 3 [2000 μs]
Number
Axes Infeed
6 1 [250 μs]
5 1 [250 μs]
4 1 [250 μs]
/TB
63