The table below shows the possible ratio settings for the SIMOTION D4x5‑2 system cycle
clocks based on the bus cycle clock.
Table 6-3
Ratios of system cycle clocks
Servo cycle clock: Bus cycle clock
IPO cycle clock: Servo cycle
clock
IPO2 cycle clock: IPO cycle
clock
As of V4.3: 1 …4, 8
V4.2: 1
1 … 6
2 … 64
As of V4.3, a reduction ratio for the servo cycle clock to the DP cycle clock is possible. The
reduction ratio is only permitted when PROFINET IO with IRT has not been configured.
If the DP interfaces (X126/X136) are configured as isochronous master interfaces, you must
set both DP cycles equal to the bus cycle clock of the SINAMICS Integrated in HW Config.
If the DP interfaces (X126/X136) are operated as the master, the system cycle clocks are
obtained from an internal cycle clock of the module. Of the two DP interfaces (X126/X136), no
more than one can also be operated as an isochronous slave interface. In this case, the system
cycle clocks are obtained from the cycle clock of the slave interface.
As a result, the task system of SIMOTION and SINAMICS Integrated runs synchronously to
the slave cycle clock. This assumes that a slave cycle clock exists and synchronization with
the slave cycle clock has been achieved. If this is not the case, the system cycle clocks are
acquired from an internal replacement cycle clock.
When the project is downloaded, the cycle clock configuration is downloaded to the
SIMOTION D4x5‑2 and automatically set according to the specifications.
Note
The deployment of TM15 (SIMOTION) and TM17 (SIMOTION) is possible only with DP
Integrated, PN and servo cycle clocks ≥ 0.5 ms. This applies to TM modules connected directly
to D4x5-2 and indirectly via CX32-2/CU320-2.
6.3.5
Cycle clock scaling of external PROFIBUS interface to internal PROFIBUS
interface
Definition
Cycle clock scaling means that an external PROFIBUS interface of the SIMOTION D4x5‑2
(X126/X136) can be operated in an integer multiple of the internal PROFIBUS interface. This
reduces the CPU load, thereby allowing you to operate more axes, for example. The settings
of the scaled cycle clocks for the external DP interfaces are made in HW Config.
Parameter assignment / addressing
6.3 Configuring PROFIBUS DP
SIMOTION D4x5-2
136
Commissioning and Hardware Installation Manual, 03/2018, A5E33441636B
