EM-RES-03
10/07
36
36 EM-RES-03
10/07
5.11.4
Communication relationships of the process data
channel
Regardless of the process data to be transmitted, the communication relationships of
the process data channels must be defined. The connection of PDO channels is done
via the assignment of the identifiers. The identifiers of Rx-/Tx-PDO must match in each
case.
There are two principal possibilities:
-
one
Rx-PDO to one Tx-PDO (one to one)
-
connect several Rx-PDO’s to one TxPDO (one to many)
This process is documented in a tabular form via a communication relationship
list
.
Example:
Frequency inverter 1 Frequency inverter 2 Frequency inverter 3
PDO Identifier PDO Identifier PDO Identifier
TxPDO1
385
TxPDO1
TxPDO1
RxPDO1
RxPDO1
385
RxPDO1
385
TxPDO2
641
TxPDO2
TxPDO2
642
RxPDO2
RxPDO2
641
RxPDO2
TxPDO3
TxPDO3
TxPDO3
RxPDO3
RxPDO3
642
RxPDO3
Attention:
All the TxPDO’s used must have different identifiers !!!
The Identifier must be clear in the system bus network.
Frequency inverter 2
PDO2
Rx Tx
385
641
PDO1
Rx Tx
PDO3
Rx Tx
Frequency inverter 1
PDO2
Rx Tx
385
641
PDO1
Rx Tx
PDO3
Rx Tx
Frequency inverter 3
PDO2
Rx Tx
385
642
PDO1
Rx Tx
PDO3
Rx Tx
642
Summary of Contents for Vectron
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