Siemens SIMATIC ET 200pro Manual page 55

Note
The EIP ET200 Configuration Tool does not check whether the modules have been grouped
correctly. If you configure more than 8 channels in one byte, the modules that exceed the
byte limit are reported as being incorrectly configured in the diagnosis:
Module status → 10
These modules are not addressed.
Note
ET 200pro assembles data on byte boundaries. Some scanners may only provide access to
this data on word boundaries. You should organize your ET 200pro modules to conform to
the scanner's restrictions. For example, configure the grouping of digital modules so that an
analog module will occupy bytes 0 to 3 or 4 to 7. In this way, the analog modules will begin
on even-byte boundaries to avoid an analog value being split between two words.
ET 200pro distributed I/O EtherNet/IP interface module
Manual, 03/2016, A5E32861915-AB
: Incorrect module; invalid user data
B
Commissioning
5.3 Grouping electronic modules
55