Functional Overview; Network Management - BONFIGLIOLI actice Instruction Manual

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Table of Contents

4.6

The system bus connects different frequency inverters physically. Logical communica-

tion channels are established via this physical medium. These channels are defined via

the identifiers. As CAN is not defined with a node-oriented, but a message-oriented

addressing via the identifiers, these identifiers can be used to define the logical chan-

nels.

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 channels

between an individual and a number of inverters (transverse movement), the setting

of the identifiers in the nodes has to be adapted.

Note:

As a special feature, the properties of the CAN bus mean that the messages transmit-

ted by one node can be received by a number of nodes simultaneously. The error

monitoring methods of the CAN bus result in the message being rejected by all recipi-

ents and automatically transmitted again if there is a faulty reception in one receiver.

4.7

The network management controls the start of all the nodes on the system bus. Nodes

can be started or stopped individually or together. For node recognition in a CAL or

CANopen 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 (net-

work management telegrams) defined according to CAN open (CiA DS 301) are used.