Siemens SIMATIC ET 200SP Manual page 36

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).
The following figure shows the assignment of the address space with submodules 1 and 2.
Figure 5-8
The figure below shows the assignment of the address space with submodules 3 and 4.
Analog input module AI 2xU/I 2-/4-wire HF (6ES7134-6HB00-0CA1)
Equipment Manual, 05/21, A5E51055079-AA
Address space for configuration as 1x 2-channel AI 2×U/I 2-/4-wire HF MSI
Parameters/address space
5.6 Address space
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