Operating instructions

IRT technology with SCALANCE X-200
Industrial Ethernet SCALANCE X-100 and SCALANCE X-200 Product Line
6-2 Operating instructions, 09/2006, A5E00349864 Release 7
group with n times the update time compared with the previous group (n can be configured);
in other words, the group is updated less often and network load is reduced.
In STEP 7 V5.4, only one update group is planned.
IRT runs alongside real-time and TCP/IP communication
Apart from IRT communication for which a fixed bandwidth is reserved within the update
time, RT communication and TCP/IP communication are also permitted within the update
time.
In RT communication (real-time communication), the cyclic data is transferred between the
IO controller and IO device, however, without the "best possible synchronicity".
Unsynchronized IO device automatically exchange data using RT communication.
Since TCP/IP communication is also possible, other non real-time data or
configuration/diagnostic data can be transported.