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6.2.5.4
Configure isochronous IO device
Configuring isochronous mode for IO devices
The drive and controller together form a sync domain. You must parameterize the IRT
operating mode (for isochronous drives) and the PROFINET settings for motion control
applications of the PROFINET IO system. Isochronous mode for the application on the bus is
only possible for PROFINET IO with IRT. In the case of PROFINET IO with IRT, a sync master
generates a synchronization telegram to which all sync slaves synchronize themselves. To use
isochronous mode, you must configure it for the IO device.
Note
Isochronous mode only applies if isochronous submodules are configured in the IO device so
that the IO controller has isochronous IO submodules. Otherwise, the Save and compile in the
TIA Portal will be terminated with an error message.
To configure isochronous mode in the TIA Portal, you should therefore have already configured
the drive and an axis for the control and assigned it to a drive object in Startdrive.
To configure isochronous mode, proceed as follows:
1. Select the IO device in the network view and click the PN interface.
The interface properties are displayed in the Inspector window.
2. In the Inspector window, under "General", click "Extended options > Isochronous mode".
3. Activate the "isochronous mode" option.
In the "detailed overview", the drive objects are displayed with the appropriate telegrams.
You must already have configured the objects and telegrams in Startdrive.
4. If necessary, activate the option "Isochronous mode" for the drive object in question. This
setting cannot be changed for telegrams for which isochronous mode is essential (e.g.
telegram 105).
MCU commissioning: NC, PLC, Drive
Commissioning Manual, 02/2020, A5E47437618B AB
Commissioning NC-controlled drives
6.2 Commissioning drives with "Startdrive"
117
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