Siemens SIMOTION D4x5-2 Commissioning And Hardware Installation Manual page 157

Rules for two PROFINET interfaces
The following rules must be taken into account when using two PROFINET interfaces, if both
interfaces are to be operated isochronously (an isochronous device or an isochronous I-device
or data exchange broadcast is configured at the interface):
● Both interfaces can be configured as a PROFINET IO I-device and/or as a controller.
● A higher-level controller must always be connected isochronously via the CBE30-2.
This applies both for the controller-controller communication and for the I-device
communication to a higher-level controller. Lower-level isochronous drives/I/O should be
connected via the onboard PROFINET interface.
● The onboard PROFINET interface must be configured as sync master.
● The CBE30-2 can be configured as sync master or sync slave.
● An F-CPU can only be connected to one of the two PROFINET interfaces, because fail-
safe I/O transfer areas can only be configured either on the I-device on the onboard
PROFINET interface or on the CBE30-2.
The PROFIsafe telegrams are routed to the following drives:
– Drives on the SINAMICS Integrated and CX32-2
– Drives on the onboard PROFINET interface (X150 interface)
– Drives on the CBE30-2 (X1400 interface)
The maximum quantity structure for PROFIsafe on PROFINET is therefore not increased
by using a second PROFINET interface.
● If Servo_fast is not used, the servo isochronous devices can be assigned to both
PROFINET interfaces.
● A redundant sync master is not permitted in the SYNC domain of the onboard PROFINET
interface if both PROFINET interfaces are operated isochronously and the CBE30-2 is
configured as a sync slave or IRT I-device.
● CBE30 supports a minimum send cycle clock of 500 μs. The SINAMICS Integrated can
therefore only be operated with 250 µs or 375 µs if isochronous communication has not
been configured for the CBE30.
Rules for Servo_fast
The following rules apply for the onboard PROFINET interface (X150) assigned to the
Servo_fast:
● The interfaces are permanently assigned:
– Servo/IPO/IPO_2 to the CBE30-2 (or DP and DP Integrated)
– Servo_fast and IPO_fast to the onboard PROFINET interface
● If the Servo_fast is used, only one CACF (Controller Application Cycle Factor) = 1 is
permitted for Servo and Servo_fast, i.e. it must be set:
– Servo cycle clock = send cycle clock of the PROFINET interface X1400 (CBE30-2)
– Servo_fast cycle clock = send cycle clock of the PROFINET interface X150 (onboard
● The Servo_fast must have a reduction ratio to the Servo of 2, 4, 8, or 16.
SIMOTION D4x5-2
Commissioning and Hardware Installation Manual, 03/2018, A5E33441636B
interface)
Parameter assignment / addressing
6.5 Configuring PROFINET IO
157