Setting the send cycle clock in HW Config
The send cycle clock for PROFINET IO must be set in the "Domain Management" dialog in
HW Config.
To do this, select the "Edit" > "PROFINET IO" > "Domain management ..." menu
command in HW Config and set the desired cycle clock.
The PROFINET interface can be operated with a send cycle clock in the range of: 0.25 ms ≤
send cycle clock ≤ 4 ms. The smallest configurable time base is 0.125 ms.
Note
Information for version < V4.4
If
there are IO devices with RT class "RT" in a sync domain, it is only possible to set the send
cycle clocks 0.5 ms, 1 ms, 2 ms, and 4 ms.
Cycle clock scaling
The PROFIBUS cycle clock can be scaled down in relation to the servo cycle clock. The
reduction ratio is only permitted when PROFINET IO with IRT has not been configured. A
reduction ratio for the PROFINET send cycle clock to the PROFIBUS cycle clock is also
possible.
Example:
PROFINET send cycle clock = 0.5 ms
PROFIBUS cycle clock = servo cycle clock = 1 ms
The PROFIBUS cycle clock can be operated relative to the PROFINET send cycle clock at a
ratio of 1:1 to 16:1.
The table below shows which ratios you can set for the system cycle clocks of the
SIMOTION D410‑2 DP/PN based on the DP cycle of SINAMICS Integrated or on the
PROFINET send cycle clock.
Table 6-7
Ratios of system cycle clocks
Cycle clock name Settable factors Reference cycle clock
PROFIBUS DP
bus cycle clock
1, 2, 3, 4, 6, 8, 10, 12, 14, 16 PROFINET IO send cycle clock
Servo
1)
1, 2, 3, 4, 8
2)
PROFIBUS DP bus cycle clock
IPO 1, 2, 3, 4, 5, 6 Servo
IPO_2 2, 3, 4, 5, …, 64 IPO
1)
When using the TO axis and the integrated drive control, the minimum servo cycle clock is 1 ms.
2)
Always "1", if PROFINET with IRT is configured.
Setting the cycle clock ratios
The set bus cycle clock is displayed in SIMOTION SCOUT as the "Bus data cycle" in the
"System Cycle Clocks - D410" dialog box. Select the SIMOTION D410-2 and then select the
"Set system cycle clocks" option in the "Target system" > "Expert" menu.
Set
the required cycle clock ratios for the servo, IPO, and IPO_2 in the "System Cycle Clocks
- D410" dialog box.
Parameter assignment / addressing
6.5 Configuring PROFINET IO
SIMOTION D410-2
Commissioning and Hardware Installation Manual, 01/2015 129