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The following applies to a CU320‑2 DP/CU320‑2 PN for which a CBE20 is configured, but
does not exist:
● SINAMICS uses the local clock (clock configured in SINAMICS); if there is no data
exchange via PROFINET, alarm A01487 is output ("Topology: Comparison option slot
component missing in the actual topology").
Access via PROFINET is not available.
Comparison between RT and IRT
Table A-9
Comparison between RT and IRT
RT
IRT "high flexibility"
IRT "high performance"
Transfer mode
Switching based on the MAC
address; prioritization of the
RT telegrams possible using
Ethernet-Prio (VLAN tag).
Switching using the MAC ad‐
dress;
bandwidth reservation by re‐
serving an IRT "high flexibili‐
ty" interval in which only IRT
"high flexibility" frames are
transferred but, for example,
no TCP/IP frames.
Path-based switching accord‐
ing to a topology-based plan;
no transmission of TCP/IP
frames and IRT "high flexibil‐
ity" frames in the IRT "high
performance" interval.
Isochronous application
in the IO controller
No
No
Yes
Determinism
Variance of the transmission
duration by started TCP/IP
telegrams.
Guaranteed transmission of
the IRT "high flexibility" tele‐
grams in the current cycle by
the reserved bandwidth.
Exactly planned transfer;
times for transmission and re‐
ceiving are guaranteed for
any topologies.
Reload the network configu‐
ration after a change
Not relevant
Only when the size of the IRT
"high flexibility" interval
needs to be modified (reser‐
vation of position is possible).
Always when the topology or
the communications relation‐
ships change.
Maximum switching depth
(number of switches in one
line)
10 at 1 ms
61
64
For possible send cycles, see subitem "Send cycles and update cycles for RT classes" in table "Adjustable send cycles and
update cycles"
Set the RT class
The RT class is set by means of the properties of the controller interface of the IO controller.
If RT class IRT "high performance" is set, it is not possible to operate any IRT "high flexibility"
devices on the IO controller and vice versa. IO devices with RT can always be operated,
regardless of the IRT class setting.
You can set the RT class in the HW Config for the associated PROFINET device.
1. In HW Config, double-click item PROFINET interface in the module.
The "Properties" dialog box opens.
2. Select the RT class under RT class on the "Synchronization" tab.
Communication
A.1 Communication
Industrial Security
Configuration Manual, 08/2017, A5E36912609A
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Страница 8: ...Introduction Industrial Security 8 Configuration Manual 08 2017 A5E36912609A ...
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