Siemens SIMATIC S7-1500 Function Manual page 95

Setting isochronous mode
1. Select the network view.
2. Select the DP master system.
3. In the properties dialog, select the tab "General > Constant bus cycle time".
4. Select the desired "Constant DP bus cycle times".
Select drive in the configuration of the technology object
1. Add a new axis technology object, or open the configuration of an existing axis.
2. Open the configuration "Hardware interface > Drive".
3. Select "PROFIdrive" from the "Drive type" drop-down list.
4. Select the standard frame of the PROFIBUS drive from the "Drive" list.
For information on how to add a technology object, refer to the section Add technology
object (Page 99).
Result
The technology object is connected to the drive and the "MC Servo" organization block can
be checked/configured.
The frame of the configured drive is assigned to the "PIP OB Servo" process image.
Checking/configuring the properties of the MC Servo
1. Open the "Program blocks" folder in the project navigator.
2. Select the "MC Servo" organization block.
3. Select the "Properties" command in the shortcut menu.
4. Select the "Cycle time" entry in the area navigation.
5. The option "Synchronous to the bus" must be selected in the dialog box.
6. A "PROFINET IO system" must be selected in the "Distributed I/O" drop-down list.
7. The application cycle of "MC-Servo" must correspond to the send clock of the bus or be
You can select a drive connected to the CPU via a communications
processor/communications module (CP/CM) in the configuration of the technology object.
You cannot select the DP master system of the CP/CM as the source clock for MC-Servo
[OB91].
Result
The PROFIBUS DP drive is now configured so that it can be controlled in the PROFIBUS
network in isochronous mode.
The properties of the SINAMICS drive must be configured according to the configuration of
the axis with a separate STARTER program.
S7-1500 Motion Control V13 Update 3
Function Manual, 07/2014, A5E03879256-AC
reduced by an integral factor relative to the send clock of the bus.
6.1 Adding and configuring drives in the device configuration
Configuring
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