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Functions

3.1 Cycle synchronization

IM151-1 HIGH FEATURE interface module (6ES7151-1BA02-0AB0)

24 Manual, 03/2008, A5E01075975-02

3. DP slave settings:

DP slave "Object properties" > "Cycle synchronization" tab

– Activate "Synchronize DP slave to equidistant DP cycle".

– Enter the times Ti and To (if "Times Ti and To identical for all slaves" has not been set

on the DP master system). Recommendation: Accept the standard settings for Ti and

To.

– Select the electronic modules to be synchronized and assign them in the "Addresses"

tab to the sub-process image defined in the CPU. For further information, please refer

to the

Isochronous Mode

Function Manual.

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Figure 3-3 DP slave properties dialog box

Note

If you click on "Cycle synchronization" in the "Edit" menu, a configuration overview of

the cycle-synchronized modules appears.

4. Create user program:

– Creating the OB 61.

– At the start of the OB 61, the SFC 126 must be called in order to update the sub-

process image of the inputs.

– At the end of the OB 61, the SFC 127 must be called in order to update the sub-

process image of the outputs.

– The sub-process image to be used is the sub-process image parameterized in the

CPU ("Cycle synchronization alarms" tab).

Siemens SIMATIC IM151-1 User Manual

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