Siemens Simatic S7-1500 Manual page 31

Note
You may only access the addresses occupied by user data and value status.
The other address areas occupied by the F-modules are assigned for functions including
safety-related communication between the F-modules and F-CPU in accordance with
PROFIsafe.
1oo2 evaluation of the sensors combines the two channels, e.g. CH0 (input bit DI
group a) with CH8 (input bit DI
you may only access the input bit from channel group a in the safety program, in this
example CH0.
Additional information
For detailed information about F-I/O access and for evaluation and processing of the value
status, refer to the SIMATIC Safety – Configuring and Programming
(http://support.automation.siemens.com/WW/view/en/54110126) manual.
Digital input module F-DI 16x24VDC (6ES7526-1BH00-0AB0)
Manual, 01/2016, A5E03858068-AA
in channel group b). With 1oo2 evaluation of the sensors,
0
Parameters/address space
4.3 Address space
in channel
0
31