Siemens SIMATIC CM35 Manual page 45

Commissioning
Data consistency
3-22
When the distributed integration is used, data consistency must be consid-
ered. Data are called consistent when their contents belong together.
When you access the CM35 with load/transfer commands, only word ac-
cesses may be used and only even addresses may be accessed so that consis-
tency is ensured.
Data consistency is specified via the COM PROFIBUS configuration. Word
consistency has already been set for the CM35 in the type or GSD files in-
cluded in the configuration package.
Figure 3-6 Setting of the consistency via COM PROFIBUS
For more information, see the manual on the distributed I/O system ET 200.
CM35 Counter Module
(4) J31069-D0416-U001-A5-7618