1 Engineering
CANopen for DA1, DC1, DE11 09/16 MN040019EN www.eaton.com 9
1 Engineering
The variable frequency drives‘ CANopen slaves are integrated into a
CANopen fieldbus system.
Figure 1: Integrating a DA1 variable frequency drive into a CANopen network
a Master area, PLC (e. g.: XC100, XC200) or PC with CANopen card
b Slave area: Variable frequency drives with CANopen interface
The RJ45 plug makes it possible to connect the variable frequency drives to a
CANopen communication network. The CiA DS-301 CANopen
communication profile documents the “How” of communications.
The CANopen communications protocol draws a distinction between
process data objects (PDOs) and service data objects (SDOs).
The variable frequency drive is controlled with fast, cyclic process data
(PDOs). The process data channel can be used not only to specify the speed
setpoint, but also to trigger various drive functions, such as enables,
operating directions, and resets.
At the same time, it can also be used to read actual values, such as the
actual speed, current, and device status, from the variable frequency drive.
As a general rule, the variable frequency drive‘s parameters are configured
using SDOs. The parameter data channel makes it possible to store all
application-related drive parameters in the higher-level controller and transfer
them to the variable frequency drive if necessary. All of the variable
frequency drive‘s parameters can be transferred with CANopen by using the
appropriate SDOs/PDOs.
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