Configuring additional drives on PROFINET (X150) as isochronous

Requirement

STEP 7, V16 or higher

SINAMICS Startdrive, V16 or higher

You can import drives that are not integrated in the TIA Portal via Startdrive using GSD files (generic station description). To do so, install the drive in the "Options" menu as a device description file (GSD).

Adding a drive and frame to the device configuration

Add the required drive system in the network view, for example, SINAMICS S120 CU320-2 PN.

Open the device view of the drive system and configure the drive objects.
You can find the relevant details in the SINAMICS S120 with Startdrive commissioning manual.

Open the network view. Assign the drive system to the PROFINET interface [X150] of the CPU.

Open the topology view. Interconnect the port of the drive system as in the real configuration with the port of the CPU.

Configure the PROFIdrive frames for the drive axes, for example, frame 105.

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:

Select the device view of the drive system.

In the properties window, select the tab "PROFINET Interface [X150]" > "Advanced options" > "Isochronous mode".

Select the "Isochronous mode" check box.

In the properties window, select the tab "PROFINET Interface [150]" > "Advanced options" > "Real-time settings" > "Synchronization".

Select "IRT" as the RT class.

Configuring the PLC as sync master and setting the send clock

Select the device view of the CPU.

In the properties window, select the tab "PROFINET interface [X150]" > "Advanced options" > "Real-time settings" > "Synchronization".

Select "IRT" as the RT class if it has not already been set automatically.

Select "Sync master" from the "Synchronization role" drop-down list.

Click the "Domain settings" button.

Set the required send clock.

Selecting the drive in the configuration of the technology object

Add a new axis technology object.

Open the configuration "Hardware interface" > "Drive".

Select the "PROFIdrive" entry from the "Drive type" drop-down list.

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.

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).

Setting the clock system

You have configured an external drive as isochronous on PROFINET using the example of the SINAMICS S120 CU320‑2 PN. Next, set the clock system.

Choose between independent and coupled isochronous mode.

Set the required send clock.

Assign the "MC Servo" OB the clock system of the PROFINET interface X150.