Siemens SIMODRIVE 611U Product Information page 42

Commissioning
4.4 Setting up a STEP 7 project
Setting the system clock cycles
Right-click Technology and select the Set system clock cycles entry in the context menu.
The following window opens:
Figure 4-27
Specifying the system clock cycles
The specifications for system clock cycles in the Technology CPU affect the position setpoint
adjustment in the SIMODRIVE 611U.
Technology CPU
The ratio of DP clock cycle to position controller clock cycle and to interpolator clock cycle
(refer to the "Set system clock cycles" figure) is set to 1:1:3, for example. This represents a
DP clock cycle of 3 ms, a position controller clock cycle of 3 ms and an interpolator clock
cycle of 9 ms.
Note
The position controller clock cycle entered here must match the master application cycle in
the HW Config!
For instructions on how to activate and use interpolator clock cycle 2, see the online
documentation in S7T Config.
42
Set system clock cycles
Connecting the SIMODRIVE 611U to the Technology CPU
Product Information, 03/2008, A5E00272066-05