Description Of Parameters; F-Parameters - Siemens SIMATIC ET 200SP HA Equipment Manual

Parameters/address space

5.2 Description of parameters

5.2 Description of parameters
5.2.1

F-parameters

F_source_address
Together, the F-source address "F_source_address" and the F-destination address
"F_destination_address" form the PROFIsafe address. The PROFIsafe address is used for the
unique identification of the F-I/O modules.
The F-source address is a unique address of the fail-safe CPU for the entire network. In S7 F/FH
systems, it is automatically preset with the value "1" and cannot be changed in the properties of
the I/O module.
F_destination_address
Together, the F-destination address "F_destination_address" and the F-source address
"F_source_address" form the PROFIsafe address. The PROFIsafe address is used for the unique
identification of the F-I/O modules.
Station-wide uniqueness:
• The F-source address "F_source_address" of the F-CPU is unique station-wide. In S7 F/FH
systems, it is automatically preset with the value "1".
• The F-destination address of the F-I/O module is automatically unique station-wide.
To prevent an incorrect parameter assignment, a station-wide unique F-destination address
is automatically assigned when the F-I/O module is placed in HW Config.
If you change F-destination address, the station-wide uniqueness of F-destination address is
automatically checked.
You must assign the F-destination address to the F-I/O module before you commission it.
Note
Requirement for type R1 system redundancy
With type R1 system redundancy for distributed I/O, the left interface module must be
plugged in so that a new F_destination_address can be assigned to the module.
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Equipment Manual, 08/2021, A5E45647528-AD
F-DI 16x24VDC HA