Siemens Simatic ET 200S Operating Instructions Manual page 136

Functions
7.2 Cycle synchronization on the PROFIBUS DP
3. DP slave settings:
Figure 7-3
4. Create user program:
7-6
DP slave "Object properties" > "Cycle synchronization" tab
– Activate "Synchronize DP slave to constant DP cycle".
– Enter times Ti and To (if "Times Ti and To for all DP slave equal" was not set on the
DP master). Recommendation: Recommendation: accept the standard settings Ti and
To.
– Select the electronic modules to be synchronized, and assign them on the
"Addresses" tab to the sub-process image defined in the CPU.
DP slave properties dialog box
Note
If you click on "Cycle synchronization" in the "Edit" menu, a configuration overview of the
cycle-synchronized devices is displayed.
– Creating the OB 61.
– At the start of the OB 61, the SFC 126 has to call up the inputs to update the sub-
process image.
– At the end of the OB 61, the SFC 127 has to call up the inputs to update the sub-
process image.
– The sub-process image to be used is the sub-process image parameterized in the
CPU ("Cycle synchronization alarms" tab).
Operating Instructions, 12/2005, A5E00515771-03
ET 200S