Siemens SIMATIC ET 200M Operating Instructions Manual page 171

3. Settings on the DP slave:
"Object properties" of the DP slave > tab "Isochrone mode"
– Enable "Synchronize DP slave to constant bus cycle time for DP cycle".
– Enter the times Ti and To (if "Times Ti and To same for all slaves" has not been set on
– Select the modules to be synchronized and in the "Addresses" tab assign the process
4. Setting up a user program:
– Setting up the OB 61.
– At the beginning of the OB 61 the SFC 126 must be called in order to update the part
– At the end of the OB 61 the SFC 127 must be called in order to update the part process
– Here, use the part process image that has been configured in the CPU ("Synchronous
ET 200M
Operating Instructions, 04/2022, EWA-4NEB7806006-09
the DP master system). Recommendation: Adopt the standard settings for Ti and To.
image partition that has been defined in the CPU.
Figure 8-23 DP slave properties dialog box
Note
If, in the "Edit" menu you click on "Isochrone mode", you will be shown a configuration
overview of the isochrone modules.
Note
An ET 200M with analog input / output modules does not work in isochrone mode if
the format of the analog values has been configured as SIMATIC S5.
process image of the inputs.
image of the outputs.
cycle interrupts" tab).
Functions
8.6 Isochrone mode
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