Siemens SIMATIC S7-1500 System Manual page 150

Activating isochronous mode in the device configuration
You can operate PROFINET drives in isochronous or non-isochronous mode. Isochronous
mode, however, increases the quality of the position control of the drive and is therefore
recommended for drives such as SINAMICS S120.
Proceed as follows to activate isochronous mode for the drive:
1. Select the device view of the drive system.
2. In the properties window, select the tab "PROFINET Interface [X150]" > "Advanced
options" > "Isochronous mode".
3. Select the "Isochronous mode" check box.
4. In the properties window, select the tab "PROFINET Interface [150]" > "Advanced
options" > "Real-time settings" > "Synchronization".
5. Select "IRT" as the RT class.
Note
If you have configured a PROFIdrive frame at the drive that requires isochronous mode,
STEP 7 automatically sets "Isochronous mode" and the RT class "IRT".
Configuring the PLC as sync master and setting the send clock
1. Select the device view of the CPU.
2. In the properties window, select the tab "PROFINET interface [X150]" > "Advanced
options" > "Real-time settings" > "Synchronization".
3. Select "IRT" as the RT class if it has not already been set automatically.
4. Select "Sync master" from the "Synchronization role" drop-down list.
5. Click the "Domain settings" button.
6. Set the required send clock.
Selecting the drive in the configuration of the technology object
1. Add a new axis technology object.
2. Open the configuration "Hardware interface" > "Drive".
3. Select the "PROFIdrive" entry from the "Drive type" drop-down list.
4. Select a drive axis of the PROFINET drive unit from the "Drive" list.
Only drives for which you have configured a suitable PROFIdrive frame are available for
selection. You can find out which PROFIdrive frames are supported by the SIMATIC
Drive Controller in the S7-1500T Motion Control function manuals
(https://support.industry.siemens.com/cs/ww/en/view/109751049).
Using the "Device configuration" button, you can switch to the drive device view, for
example, to configure drives or set other PROFIdrive frames (for example 39x frame for
the X122/X132 IOs of a CU320-2).
SIMATIC Drive Controller
System Manual, 11/2019, A5E46600094-AA
Configuring
7.11 Configuring the clock system
149