Siemens SIMATIC ET 200pro - Commissioning and diagnostics; 4.1 Commissioning

Commissioning
5.3 Grouping electronic modules
ET 200pro distributed I/O EtherNet/IP interface module
Manual, 03/2016, A5E32861915-AB
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
B
: Incorrect module; invalid user data
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.