IRT technology with SCALANCE X-200 7
With STEP 7 as of V5.4, you can configure PROFINET devices that support data exchange
over isochronous real-time Ethernet (IRT). IRT frames are transferred deterministically over
planned communication paths in a fixed order to achieve the best possible synchronicity and
performance.
Supported devices
Topology-based IRT requires special network components that support planned data
transmission. X202-2IRT, X204IRT, XF204IRT, X204IRT PRO , X202-2P IRT, X202-2P IRT
PRO , X201-3P IRT and X200-4P IRT support topology-based IRT.
Note
In IRT mode, all X-200 IE switches in a plant must either have firmware version V3.1 or
older, or they must have firmware version V4.0 or newer.
Operating an IRT plant containing both devices with firmware V3.1 or older and devices with
V4.0 or newer is not possible.
Where necessary, install firmware V3.1 on the devices. This can be found on the
accompanying CD in the \FW\SCALANCE X-200 IRT Isochronous Real-Time\ folder.
You should remember the following restrictions:
The SCALANCE XF204 IRT is compatible with firmware X200IRT V4.1 or later.
The SCALANCE X201-3P IRT PRO is compatible with firmware X200IRT V4.5 or later.
Firmware V3.1 must not be used for these two modules.
Note
No port mirroring in IRT mode
Disable the function "Port Mirroring" in SCALANCE X-200 IRT devices if you want to operate
the device in IRT mode. IRT mode is not possible when the mirroring function is enabled.
Note
The use of the SCALANCE X-200 IRT as a redundant sync master is only permitted for IRT
with the "High Performance" option.
Constant bus cycle and isochronous real time now also available with PROFINET
The possibilities available for constant bus cycles and isochronous real time with PROFIBUS
DP are now available for PROFINET IO.
When using the constant bus cycle functionality in PROFIBUS DP, all nodes are
synchronized by a global control signal generated by the DP master.
SCALANCE X-200
Operating Instructions, 12/2011, A5E00349864-19 243