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2.8 Enabling safe outputs for PROFIsafe
A “1” is only forwarded by the PST (PROFIsafe driver for F-Slaves) to the SAL (safety appli-
cation layer) for a safe output if the consecutive number has changed in the corresponding
PROFIsafe container.
A “0” is always forwarded.
This prevents the toggling of an output by telegrams with the same consecutive number
(e.g., by changing the order of PROFIsafe containers with the same consecutive number).
2.9 Process data words
2.9.1 INTERBUS
The module occupies three words in the INTERBUS system. In the standard control system,
the input and output data is mapped to a single word.
The standard control system provides the output data for the safe INTERBUS controller as
standard data. The outputs are only controlled by the safe INTERBUS controller.
The input data only indicates the actual status of the outputs if no bus errors or device errors
are present. Even during the parameterized switch-off delay in stop category 1, the status
of the outputs on the module does not correspond to the status of the outputs on the safe
controller.
The parameterization of the outputs determines whether the input data is mapped in single-
channel or two-channel mode. The value for “parameterized output” for the outputs is also
set for the input data.
In the following tables, both the maximum single-channel and maximum two-channel as-
signments are presented. Depending on the parameterization, other process data word as-
signments are also possible (for an example, see Page 28).
The process data input word is specified for internal use only.