Siemens D410 Benutzerhandbuch

 

Configuring SIMOTION D410 

 

3.3 Configuring the PROFIBUS DP interface (only D410 DP) 

D410 
Commissioning Manual, 08/2008 Edition 

49

 

3.3.5 

Setting the DP cycle and system cycle clocks 

All system clocks for SIMOTION D410 DP are based on the DP cycle of SINAMICS 

Integrated, which must be set in HW Config.  
Double-click the SINAMICS block at the integrated PROFIBUS. The "DP Slave Properties" 

dialog box opens. You can synchronize the DP cycle of SINAMICS Integrated in the 

"Isochronous mode" tab. 

Table 3-1 

Range of values for SIMOTION D410 DP 

DP cycle: 

≥ 1 ms 

Resolution: 

0.125 ms 

 
The PROFIBUS DP interface of the SIMOTION D410 DP supports operation at a DP cycle 

time ≥ 1 ms, at a resolution of 0.125 ms. SINAMICS Integrated always runs in isochronous 

mode. The cyclic tasks of SIMOTION are therefore always in synchronism with 

SINAMICS Integrated. 
The set DP cycle of SINAMICS Integrated is displayed as "Bus cycle" in the "System Clocks 

- D410..." dialog box in SIMOTION SCOUT. Select the SIMOTION D410 DP in the project 

tree, and then select the "Set system clocks" option in the "Target system" > "Expert" menu. 
The table below shows the ratios you can set for the system clocks of SIMOTION D410 DP 

based on the DP cycle.  

Table 3-2 

Possible factors between the system cycle clocks 

Bus cycle: Servo cycle clock 

Servo cycle clock: IPO 

cycle 

IPO cycle: IPO2 cycle 

1 ... 4, 6, 8 

1 … 6 

2 … 64 

 
The minimum configurable length of the servo cycle is 1 ms. In conjunction with technology 

objects, a minimum servo cycle of 2 ms is recommended. 
If you programmed the PROFIBUS DP interface for operation in isochronous master mode, 

you must synchronize its DP cycle with the DP cycle of SINAMICS Integrated in HW Config. 
The timebase for the system clocks is generated internally if the DP interface is operated in 

isochronous or non-isochronous master mode. SIMOTION D410 does not have to 

synchronize itself with an external cycle. 
The PROFIBUS DP interface can also be operated in isochronous slave mode. In this 

constellation system clocks are based on the clock signals received at the slave interface. A 

substitute clock of a duration equivalent to the configured clock is generated internally if the 

isochronous slave interface has not received a clock signal. 
The clock settings are included in the project download to SIMOTION D410 DP and are 

adjusted according to specification. 
At a PROFIBUS DP interface operated in isochronous slave mode you can also step down 

the clock ratio for synchronization with SINAMICS Integrated. This reduction of the clock 

ratio at the isochronous slave interface for synchronization with SINAMICS Integrated allows 

the operation of a DP cycle at the slave interface which is equivalent to an integer multiple 

SINAMICS Integrated. You set up this reduction by configuring the SINAMICS Integrated 

and DP interface cycles in HW Config. The rule is checked in HW Config.