Siemens SIMATIC S7-1500 Function Manual page 34

Procedure for configuring isochronous mode on the DP slave
1. Select the DP slave in the network view. Navigate to the "Isochronous mode" area in the
Inspector window.
2. Enable the option for synchronization to the DP cycle for the DP slave.
Default: The DP slaves get the Ti/To values from the subnet. Therefore, the values are
automatically the same for all DP slaves of the DP master system.
3. In the "Detail overview", select the "Isochronous mode" option for all I/O modules you
want to operate isochronously.
4. Repeat steps 1 and 3 for all DP slaves that you want to operate in isochronous mode.
Figure 5-6 Configuring isochronous mode on the DP slave
Procedure for configuring the I/O module
1. Select an I/O module in the device view. Navigate to the "I/O addresses" area in the
Inspector window.
– The option for isochronous mode is selected.
Assign the process image partition and OB to the I/O modules as described in section
Configuring isochronous mode for distributed I/O on PROFINET IO (Page 24).
Isochronous mode
Function Manual, 10/2018, A5E43884988-AA
5.4 Configuring isochronous mode for distributed I/O on PROFIBUS DP
Configuring isochronous mode
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