Operating Instructions

Communication via PROFIBUS and PROFINET

3.1 PROFIDRIVE profile - Cyclic communication

Fieldbuses

Function Manual, 04/2018, FW V4.7 SP10, A5E34229197B AE

3.1.7

Slave-to-slave communication

"Direct data exchange" is sometimes called "slave-to-slave communication" or "data

exchange broadcast". Here, slaves exchange data without any direct involvement of the

master.

Example: An inverter uses the actual speed value of another inverter as its speed setpoint.

Definitions

●

Publisher:

Slave, which sends data for direct data exchange.

●

Subscriber:

Slave, which receives the data for direct data exchange from the publisher.

●

Links and access points

define the data that is used for direct data exchange.

Restrictions

● Direct data exchange in the current firmware version is only possible for inverters with

PROFIBUS communication.

● A maximum of 12 PZDs are permissible for each drive.

● A maximum of four links are possible from one subscriber to one or several publishers.

Configuring slave-to-slave communication

Procedure

1. In the control, define:

– Which inverters operate as publisher (sender) or subscriber (receiver)?

– Which data or data areas do you use for direct data exchange?

2. In the inverter, define:

How does the subscriber process the data transferred using direct data exchange?

You have now configured slave-to-slave communication.

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