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Logical I/O of an F-Device

The PROFIsafe parameters of an F-Device are located in the editor of the logical I/Os of the F-Device:

  • Tab: Safe parameterization: i-parameters. These are the safety-oriented device parameters from PROFIsafe devices.

  • Tab: Safe Configuration: F-Parameters. These are the protocol parameters of PROFIsafe.

The variables that are used for the safety application to access the I/Os are defined on the I/O Mapping tab of the editor.

For a more detailed description of the editor and its tabs, refer to Device Editor of Logical I/Os.

F-Parameters

Which of the F-Parameters listed below are actually used depends on the device.

  • F_Check_SeqNr

    • V2 mode: A sequential number that is always to be included in the CRC2 generation

    • Not editable

  • F_Check_iPar

    • Manufacturer-specific use within a homogeneous system

    • Not editable

  • F_SIL

    • SIL which the user requires from the respective F-Device. It is compared with the manufacturer's specification.

    • Editable

  • F_CRC_Length

    • CRC length

    • Value: 3-byte CRC

  • F_Par_Version

    • Version number of F-Parameters/FSCT 3/1 operating mode

    • Preset value: V2 mode (only V2 is supported)

    • Editable

  • F_Block_ID

    • Identification of the type of parameter block

    • Not editable

  • F_Source_Add

    • Editable

    • F_Par_CRC changes when there is a change to F_Source_Add.

Caution

The user must ensure that the F-Host has a unique source address within the PROFINET network and PROFIBUS fieldbuses (even for several safety controllers in the same fieldbus).

For topology T2 when several safety controllers are below the same PROFIBUS/PROFINET master: The uniqueness of F_Source_Add must be guaranteed in the entire PROFINET/PROFIBUS network.

Tip

The user must ensure through organizational means that the F_Source_Add source address of each F-Device of an F-Host corresponds exactly to the source address of its F-Host.

  • F_Dest_Add

    • Unique target address of the F-Device in the PROFIsafe network.

      • If several F-Hosts are used for controlling a plant, it is recommended to give to all F-Devices a unique F_Dest_Add. To this end, it is recommended that the user makes a list with the ranges of values for F_Dest_Add that are permissible for the individual hosts.

      This must also be realized even in the case of failure to satisfy the prerequisite that each F-Device is connected to precisely one F-Host via the wiring and thus receives its F-Parameters only from this F-Host.

    • Editable

    • F_Par_CRC changes when there is a change to F_Dest_Add.

Caution

The user must ensure that all F-Devices have a unique destination address F_Dest_Add within a PROFINET network or PROFIBUS fieldbus (even for several safety controllers in the same network).

Tip

The user must make sure that the F_Dest_Add on the Safe Configuration tab corresponds to the setting on the address switch of the F-Device (usually a DIP switch).

  • F_WD_Time

    • Time specification (in milliseconds) for the watchdog timer that monitors the duration until the receipt of the next valid PROFIsafe message.

    • Default value of the GSD file: Maximum processing time of the F-Device

    • Editable

    • F_Par_CRC changes when there is a change to F_WD_Time.

  • F_iPar_CRC

    • CRC that is calculated from the i-Parameters of the F-Device.

    • F_Par_CRC changes when there is a change to F_iPar_CRC.

Tip

As the value of F_iPar_CRC, the value of the CRC must be entered manually by means of the i-Parameters of the F-Device. The CRC for the i-Parameters is located on the Safe parametrization tab of the logical I/O of the F-Device or in the respective F-Device manufacturer-specific tool.

  • F_Par_CRC

    • CRC for all F-Parameters

    • Calculation by safe editors

    • This ensures the error-free transmission of the F-Parameters.

    • Not editable

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