Siemens SIMATIC S7-1500 Function Manual page 41

Configuring isochronous mode
5.5 Configuring isochronous mode for a Motion Control application
7. In the "Output cam output" area of the configuration, enable output by the technology
module for the output cam. Assign a cam output.
Figure 5-12 Assigning output of the technology module to the output cam
The addresses and TPA OB Servo process image partition are automatically assigned to
the technology module.
Result: The cam output is configured as isochronous cam output.
Reference
You can find information on programming isochronous mode for Motion Control applications
in section Programming isochronous mode.
You can find additional information on the above-mentioned OBs and their use in the
STEP 7 online help.
You can find examples of parameter assignment and possible settings of isochronous mode
for distributed I/O and drives in STEP 7 as FAQs on the Internet
(https://support.industry.siemens.com/cs/ww/en/view/109480489).
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Isochronous mode
Function Manual, 10/2018, A5E43884988-AA