Technical data - PROFINET RT

When using TwinCAT 2.11, all the target systems, for instance the CX Controllers, must have TwinCAT version 2.11 installed.

Technical data

Supplement

PROFINET version

RT Class 1 ConformanceClassB

Number of device interfaces )1

8

Topology

variable

Quantity of user data

per device, maximum one Ethernet frame length )2
1500 bytes of user data, inc. IOPS and IOCS

Cycle time

≥ 1 ms

)1 see the chapter on virtual PROFINET devices
)2 Depending on the cycle time, the PROFINET cycle time, and the CPU being used

Technical data - PROFINET RT 1:

Conditions required for operation

    • Only Ethernet cards with Intel chipset are allowed.
    • RealTime Ethernet driver must be installed.
    • No other RealTime protocols must be connected through this interface.
    • The real-time capability can only be guaranteed in the transmit direction; in the receive direction, the possibility of incorrect use means that it cannot be guaranteed. This might, for example, be the copying of large quantities of data through this interface.
      It is recommended that the PROFINET network is separated from other networks.