Siemens ET 200SP Manual page 124

The figure below shows an example of a 1:3 ratio of application cycle to period duration with
a duty cycle of 50%.
Note
No HW enable or On delay
No hardware enable or On delay can be used in isochronous mode.
If you configure the hardware enable in isochronous mode, this is interpreted by the module
as a limit switch.
Further information
You will find a detailed description of isochronous mode in:
● In the isochronous mode function manual as a download from the Internet
(https://support.industry.siemens.com/cs/ww/en/view/109755401).
● PROFINET with STEP 7 function manual available for download on the Internet
(https://support.industry.siemens.com/cs/ww/en/view/49948856).
Technology Module TM Pulse 2x24V (6ES7138‑6DB00‑0BB1)
Manual, 05/2019, A5E35061186-AB
Configuring/address space
4.6 PWM with DC motor motor
123