Setting The Dp Cycle And System Cycle Clocks - Siemens SIMOTION D4 5-2 Series Commissioning And Hardware Installation Manual

5.3.4

Setting the DP cycle and system cycle clocks

All cycle clocks for the SIMOTION D4x5-2 are based on the DP cycle of SINAMICS
Integrated, which must be set in HW Config.
To do so, click the SINAMICS block on the integrated PROFIBUS. The "DP Slave
Properties" dialog box opens. You can adjust the DP cycle of the SINAMICS Integrated on
the "Isochronous mode" tab.
Table 5- 2
DP cycle
Grid
Min. IPO cycle
External DP interfaces can only be operated with a DP cycle of ≥ 1 ms.
SINAMICS Integrated always runs in isochronous mode. The DP cycle setting of the
SINAMICS Integrated is displayed as the "Bus data cycle" in the "System Cycle Clocks"
dialog box. In SIMOTION SCOUT, select the SIMOTION D control unit and then select the
"Set system cycle clocks" option in the "Target system" > "Expert" menu.
The table below shows the possible ratio settings for the SIMOTION D4x5-2 system cycle
clocks based on the bus cycle clock.
Table 5- 3
Servo cycle clock: Bus cycle clock
As of V4.3: 1 ...4, 8
V4.2: 1
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 clock.
When the project is downloaded, the cycle clock configuration is downloaded to the
SIMOTION D4x5-2 and automatically set according to the specifications.
SIMOTION D4x5-2
Commissioning and Hardware Installation Manual, 02/2012
SIMOTION D4x5-2 value range
D425-2 DP, DP/PN
D435-2 DP, DP/PN
≥ 0.5 ms (DP internal
)≥ 1.0 ms (DP external)
0.125 ms
≥ 0.5 ms
Ratios of system cycle clocks
Parameter assignment / addressing
IPO cycle clock: Servo cycle
clock
1 ... 6
5.3 Configuring PROFIBUS DP
D445-2 DP/PN
D455-2 DP/PN
≥ 0.5 ms (DP internal
)≥ 1.0 ms (DP external)
0.125 ms
≥ 0.5 ms
IPO2 cycle clock: IPO cycle
clock
2 ... 64
125