Siemens SINAMICS S150 Operating Instructions Manual page 251

RT class
Determinism
Reload the network
configuration after a change
Cross-traffic (controller-
controller):
Maximum switching depth
(number of switches in one
line)
Synchronization accuracy
Possible transmission cycle
clocks (observe any device-
specific restrictions)
Set the RT class
The IO controller determines which RT class its IO system supports, by setting the real time
class at its controller interface. If IRTtop is set, it is not possible to operate any IRTflex
devices on the IO controller and conversely. RT devices can always be operated, even if IRT
classes are set.
You can set the RT class in the HW Config for the associated PROFINET device.
1. Double-click the PROFINET board entry in the module in HW Config.
2. Select the realtime class for RT class in the Synchronization tab.
3. Click OK to confirm.
Drive converter cabinet units
Operating Instructions, 07/07, A5E00288214A
RT
Variance of the transmission
duration due to TCP/IP
telegrams being underway.
-
-
10 at 1 ms
-
1,000; 2,000; 4,000 µs
The Properties dialog box is called.
IRTflex
Guaranteed transmission of
the IRTflex telegrams in the
current cycle by the reserved
bandwidth.
Only when the size of the
IRTflex interval needs to be
modified (reservation of
reserves is possible).
-
20
Forwarding of the sync
telegram in software.
500 (planned as of FW2.5
SP1); 1,000; 2,000; 4,000 µs
Operation
6.8 PROFINET IO
IRTtop
Exactly planned transfer;
times for transmission and
receiving are guaranteed for
any topologies.
Always when the topology or
the communications
relationships change.
Yes
20
Forwarding of the sync
telegram in software.
accuracy <1 µs)
500 (planned as of FW2.5
SP1)/1,000 – 4,000 µs in
increments of 125 µs. The
increment depends on the
controller.
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