REXROTH IndraDrive Fc FCS01, Operating Instructions Manual

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Control Communication - Field Busses and Protocols Rexroth IndraDrive FCS01.1
DOK-INDRV*--FCS01*****-IB01_EN-P
15.5 DeviceNet
Use and Application
The FCS01 basic device is supplied with a blind cover for the function
module slot. In basic version, it does not comprise components for
parameterization or control.
In addition to the communication profile, DeviceNet defines the so-called
device profiles for the main device types used in industrial automation
engineering, e.g. digital and analog I/Os, drives etc.
DeviceNet is an open field bus system for networking various controls,
e.g. PLC or PC, with sensors and actuators.
Devices by different manufacturers and different complexities can be
interconnected per DeviceNet and controlled, diagnosed, configured and
parameterized via the bus.
DeviceNet constitutes the link between the communication nodes by
means of the well-proven "Common Industrial Protocol" (CIP). Physical
basis is the CANbus.
DeviceNet Protocol
Overview
Element Description
Nodes In a DeviceNet, up to 64 nodes can communicate with each other. Each
node has its own node address.
Communication, connection
objects Communication between the individual devices takes place via
connection objects. Before data exchange starts, these links (
connection
objects) must be established.
Predefined Master/ Slave
Connection Set The Predefined Master/ Slave Connection Set provides an interface which
can be used to allocate a set of up to 4 connections:
Explicit Messaging Connection
Polled I/O Connection
Bit.Strobe I/O Connection
Change Of State / Cyclic I/O Connection
The slave can only be accessed from a master.
Object model DeviceNet describes all data and functions by way of an object model.
Here, an
object represents the individual components within a device.
It is defined by its data or characteristics ( attributes) and provides
functions or services for external access. An object class defines all
characteristics (attributes/services) of objects of the same type. The
generation of an object instance creates a real copy of the object with
data of its own.
Explicit message Via Explicit messages, configuration/diagnosis data with low priority are
exchanged (parameterization). This connection is always a point-to-point
connection according to the client/server principle.