Further information
For further information, see the
SIMOTION Communication
System Manual.
6.5.2.5 PROFINET V2.3: Optimized data transfer / 125 µs PROFINET send cycle clock
All SIMOTION D4x5‑2 DP/PN Control Units support PROFINET according to the
PI specification PN V2.3. For SIMOTION D455‑2 DP/PN, the optional functionality
Performance Upgrade is available, which provides the following functional scope:
● Reduction of the minimum PROFINET send cycle clock from 250 µs to 125 µs (isochronous)
● Optimization of data transfer (e.g. by Dynamic Frame Packing - DFP)
By optimized data transfer
– more devices can be operated with the same cycle time or
– the cycle time can be reduced for the same number of devices
Requirements
The following configuration rules must be taken into account when using the 125 µs send cycle
clocks:
● The 125 µs send cycle clock is only available for the SIMOTION D455-2 DP/PN
● Configuration only with SCOUT TIA as of V4.5 (SIMOTION in the TIA Portal)
● The 125 μs send cycle clock is only supported by the onboard PROFINET interface X150
● X150 can only be used as a PROFINET IO controller (not as an I-device)
● Only one port can be used on X150; the other two ports must therefore be deactivated in
the interface properties of X150
The following then applies:
– The deactivated ports also cannot be used for TCP/IP and UDP communication
– No MRP/MRPD media redundancy
– Devices that support a send cycle clock of 125 µs must be connected via "one" active
port of X150 (assign device to the controller and configure the Ethernet topology in the
topology view)
● For isochronous mode, the clock synchronization must be activated on the controller (sync
master) and on the device (sync slave) (RT class: IRT)
● The 125 µs send cycle clock is only supported in conjunction with Servo_fast/IPO_fast;
activate the "Use Servo_fast" option at Isochronous mode in the CPU properties in the TIA
Portal.
● In addition to the send cycle clock, the "Enable High Performance" option must be activated
for the sync domain.
Parameter assignment / addressing
6.5 Configuring PROFINET IO
SIMOTION D4x5-2
158 Commissioning and Hardware Installation Manual, 03/2018, A5E33441636B
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