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Setting the send cycle clock on the PLC
Proceed as follows to set the send cycle clock on the PLC:
1. In the network view, click the PLC in the basic rack of the SINUMERIK MCU.
2. Switch to Inspector window "Properties > General > PROFINET interface [X150] >
Extended options > Real-time settings > I/O communication > Send clock".
3. Set the required send cycle clock.
Checking the settings for isochronous operation
The drive and control together form a sync domain. For motion control applications of the
PROFINET IO system, you must parameterize the IRT operating mode (for isochronous drives)
and the PROFINET settings. Isochronous mode of the application with the bus is only possible
with 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.
As default, "Automatic" mode is set for the drive to calculate the Ti/To values. When
"Automatic" is activated, STEP 7 calculates a Ti value and a To value that is suitable for all
modules that are operated isochronously and assigned to the OB.
To change the calculation mode for the Ti/To values, proceed as follows:
1. Under "Project navigation > Ungrouped devices", double-click the drive you created.
The device configuration for the drive is displayed in the Inspector window.
2. In the Inspector window, under "Properties > General > PROFINET interface [X150] >
Extended options > Isochronous mode", under "Manual" mode select "Ti/To values".
MCU commissioning: NC, PLC, Drive
Commissioning Manual, 02/2020, A5E47437618B AB
Commissioning NC-controlled drives
6.3 Commissioning drives via device master files
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