Functional Overview; Network Management - BONFIGLIOLI Active Cube User Manual

7.6

Functional overview

The system bus produces the physical connection between the frequency inverters.
Logical communication channels are produced via this physical medium. These chan-
nels are defined via the identifiers. As CAN does not possess a subscriber-oriented,
but a message-oriented addressing via the identifiers, the logical channels can be
displayed via it.
In the basic state (factory setting) the identifiers are set according to the Predefined
Connection Set of CANopen. These settings are aimed at one master serving all the
channels. In order to be able to build up process data movement via the PDO chan-
nels between individual or a number of inverters (transverse movement), the setting
of the identifiers in the subscribers has to be adapted.
Note:
As a special feature, the properties of the CAN bus mean that the messages transmit-
ted by one subscriber can be received by a number of subscribers simultaneously.
The error monitoring methods of the CAN bus result in the message being rejected
by all recipients and automatically transmitted again if there is a faulty reception in
one receiver.
7.7

Network management

The network management controls the start of all subscribers to the system bus.
Subscribers can be started or stopped individually or jointly. For subscriber recogni-
tion in a CAL or CAN open system, the slaves on the system bus generate a starting
telegram (boot-up report).
In the event of a fault, the slaves automatically transmit a fault report (emergency
message).
For the functions of the network management, the methods and NMT telegrams
(network management telegrams) defined according to CAN open (CiA DS 301) are
used.
SDO 2 SDO 1
Controller / PC
03/12
The exchange of data is done message-oriented. A frequency inverter
can transmit and receive a number of messages, identified via various
identifiers.
PLC
Field bus
System bus Master
Parameter Function
PDO
System bus
EM-ABS-01 for ACU
System bus Slave
Parameter Function
SDO 2 SDO 1
System bus
System bus
PDO
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