Technosoft 2014
78
iPOS4808 MX Technical Reference
5. Step 3. Motion Programming
5.1. Using a CANopen Master (for iPOS4808 CANopen execution)
The iPOS4808 drive conforms to
CiA 301 v.4.2
application layer and communication profile,
CiA
WD
305 v.2.2.13
layer settings services and protocols and
CiA DSP 402
v3.0
device profile for
drives and motion control the now included in IEC 61800-7-1 Annex A, IEC 61800-7-201 and IEC
61800-7-301 standards. For details see
iPOS CANopen Programming
(part no.
P091.063.iPOS.UM.xxxx)
.
5.1.1.
CiA-301 Application Layer and Communication Profile Overview
The iPOS4808 drive accepts the following basic services and types of communication objects of
the CANopen communication profile CiA301 v4.2:
Service Data Object (SDO)
Service Data Objects (SDOs) are used by CANopen m
aster to access any object from the drive’s
Object Dictionary. Both expedited and segmented SDO transfers are supported. SDO transfers
are confirmed services. The SDOs are typically used for drive configuration after power-on, for
PDOs mapping and for infrequent low priority communication between the CANopen master and
the drives.
Process Data Object (PDO)
Process Data Objects (PDO) are used for high priority, real-time data transfers between CANopen
master and the drives. The PDOs are unconfirmed services which are performed with no protocol
overhead. Transmit PDOs are used to send data from the drive, and receive PDOs are used to
receive on to the drive. The iPOS4808 accepts 4 transmit PDOs and 4 receive PDOs. The
contents of the PDOs can be set according with the application needs using the dynamic PDO-
mapping. This operation can be done during the drive configuration phase using SDOs.
Synchronization Object (SYNC)
The SYNC message provides the basic network clock, as the SYNC producer broadcasts the
synchronization object periodically. The service is unconfirmed. The iPOS4808 supports both
SYNC consumer and producer.
Time Stamp Object (TIME)
The Time Stamp Object is supported by the iPOS4808 device.
Emergency Object (EMCY)
Emergency objects are triggered by the occurrence of a drive internal error situation. An
emergency object is transmitted only once per ‘error event’. As long as no new errors occur, the
drive will not transmit further emergency objects.
Network Management Objects (NMT)
The Network Management is node oriented and follows a master-slave structure. NMT objects are
used for executing NMT services. Through NMT services the drive can be initialized, started,
monitored, reset or stopped. The iPOS4808 is a NMT slave in a CANopen network.
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