Siemens SIMATIC S7-1500/ET 200MP Manual page 18

Address space of AI 16xU BA
The figure below shows the address space allocation for the configuration as 16-channel
module. You can freely assign the start address for the module. The addresses of the
channels are derived from the start address.
"IB x" stands, for example, for the module start address input byte x.
Figure 4-2
Address space for configuration as 1 x 16-channel AI 16xU BA MSI
The channels 0 to 15 of the module are copied in up to four submodules with configuration 1
x 16-channel module (module-internal shared input, MSI). Channels 0 to 15 are then
available with identical input values in different submodules. These submodules can be
assigned to up to four IO controllers when the module is used in a shared device. Each IO
controller has read access to the same channels.
The number of usable IO controllers depends on the interface module used. Please observe
the information in the manual for the particular interface module.
Value status (Quality Information, QI)
The meaning of the value status depends on the submodule on which it occurs.
For the first submodule (=basic submodule), the value status 0 indicates that the value is
incorrect.
For the 2nd to 4th submodule (=MSI submodule), the value status 0 indicates that the value
is incorrect or the basic submodule has not yet been configured (not ready).
Analog input module AI 16xU BA (6ES7531-7LH00-0AB0)
Equipment Manual, 09/2020, A5E47052556-AA
Address space for configuration as 1 x 16-channel AI 16xU BA with value status
Parameters/address space
4.4 Address space
17