Parameterization and configuration
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The PROFIsafe address type 1 is used, i.e. the uniqueness of the PROFIsafe address is only ensured
by the PROFIsafe destination address. The PROFIsafe source address has no influence on the
uniqueness of the PROFIsafe address. The PROFIsafe destination address must therefore be unique
CPU-wide (includes all F-peripherals assigned to an F-CPU) and network-wide (across subnet
boundaries).
6.8.8 F_WD_Time
This parameter determines the monitoring time [ms] in the measuring system. A valid current safety
telegram must arrive from the F Host within this time, otherwise the measuring system is set into the
safe state.
The default value is 125 ms.
Generally, the watchdog time must be selected high enough so that telegram running times are
tolerated by the communication, but low enough so that the fault reaction function can be executed
fast enough in case of an error.
6.8.9 F_iPar_CRC
This parameter represents the checksum value (CRC3) calculated from all iParameters of the device-
specific part of the measuring system and ensures the secure transmission of iParameters. This value
is calculated by the program TR_iParameter provided by TR-Electronic, see below. The checksum
value determined must then be manually entered in the Engineering Tool of the F Host.
6.8.10 F_Par_CRC
This parameter represents the checksum value (CRC1) calculated from all F-Parameters of the
measuring system and ensures the secure transmission of F-Parameters. This value is externally
calculated in the F Host Engineering Tool and must be entered into this parameter, or it is
automatically generated.
6.8.11 iPar_CRC checksums – calculation
The checksum calculation of the iParameters (F_iPar_CRC) requires the CRC calculation program
TR_iParameter:
– Program download: www.tr-electronic.de/f/zip/TR-ECE-SW-MUL-0008
– Manual download: www.tr-electronic.de/f/TR-ECE-TI-DGB-0327
This program is a Device Tool with TCI interface (Tool Calling Interface) and can be started from
within the Engineering Tool. The network address of the measuring system to be configured is also
provided. The Device Tool enables parameterization and calculates the iPar_CRC checksum. The
checksum can either be displayed in hexadecimal or decimal form; it can be copy/pasted into the input
field F_iPar_CRC in the configuration part of the Engineering Tool.
The program can also be operated in stand-alone mode if the engineering tool does not support a TCI
interface. To do this, simply install the program under a WINDOWS operating system, load the
appropriate GSDML device description file, set the iParameter accordingly, and calculate the
iPar_CRC checksum from it.
The F_Par_CRC checksum calculation usually takes place within the Engineering Tool itself and
requires no additional software.
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