Siemens S7-1500 Manual page 20

Parameters/address space
4.3 Address space
The following figure shows the assignment of the address space with submodules 3 and 4
and the value status.
Figure 4-4
Reference
You can find information on the module-internal shared input/shared output (MSI/MSO)
function in the section Module-internal shared input/shared output (MSI/MSO) of the function
manual PROFINET with STEP 7 V13
(https://support.industry.siemens.com/cs/ww/en/view/49948856).
20
Address space for configuration as 1 x 16-channel DI 16x24...125VUC HF MSI
Digital input module DI 16x24...125VUC HF (6ES7521-7EH00-0AB0)
Manual, 12/2016, A5E35681478-AC