Siemens SIMATIC ET 200S Operating Instructions Manual page 105

Acceptance of Values with the Load Function
Figure 2-41
Note
Only one of the following control bits can be set at a particular time:
LOAD_VAL or LOAD_PREPARE.
Otherwise, the ERR_LOAD error is reported until all the specified control bits are deleted
again.
The ERR_LOAD error bit is only deleted when a correct value is transferred as follows.
Technological Functions
Operating Instructions, 06/2010, A5E00124867-07
Acceptance of Values with the Load Function
1Count24V
2.9 Position feedback
105