Siemens SINAMICS G120 Instructions d'exploitation télécharger pdf (Page 118)

Configuring the fieldbus

6.1 Communication via PROFIBUS

Inverter with CU240B-2 and CU240E-2 Control Units

116 Operating Instructions, 01/2011, FW 4.4, A5E02299792B AB

6.1.4.4 Slave-to-slave communication

With "Slave-slave communication" ( also called "Data Exchange Broadcast") it is possible to

quickly exchange data between inverters (slaves) without the master being directly involved,

for instance to use the actual value of one inverter as setpoint for other inverters.

For slave-to-slave communication, in the control system you must define which inverter acts

as publisher (sender) or subscriber (receiver) - and which data or data areas (access points)

you wish to use for slave-to-slave communication. In the inverters that operate as subscriber,

you must define how the data transferred using slave-to-slave communication is processed.

Using parameter r2077, in the inverter, you can read-out the PROFIBUS addresses of the

inverters for which the slave-to-slave communication function is configured.

● Publisher Slave, which sends the data for slave-to-slave communication.

● Subscriber Slave, which receives the data from slave-to-slave communication from the

publisher.

● Links and access points define the data that are used for slave-to-slave communication.

You must observe the following restrictions for the slave-to-slave communication function:

● a maximum of 8 PZD are permissible for each drive

● To a publisher, a maximum of 4 links are possible

An example of how you configure slave-to-slave communication between two inverters in

STEP 7 is provided in Section: Configuring slave-to-slave communication in STEP 7

(Page 290).

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Siemens SINAMICS G120 Instructions d'exploitation Page 118