
EtherCAT Information
TR-Electronic GmbH 2010, All Rights Reserved
Printed in the Federal Republic of Germany
Page 108 of 176
TR - ECE - BA - DGB - 0080 - 05
10/07/2013
Write services, Client --> Server
●
Initiate SDO Download Expedited
The
Expedited SDO Download
service is used for the accelerated
transmission of ≤ 4 bytes. The server responds with the result of the
download request.
●
Initiate SDO Download Normal
The
Initiate SDO Download
service is used for an individual transmission
of data, if the number of bytes can be accepted by the mailbox, or if a
segmented transmission is to be started with more bytes.
●
Download SDO Segment
The
SDO Download Segment
service is used to transfer the additional
data that could not be transferred with the
Initiate SDO Download
service.
The master starts as many Download SDO Segment services as are
required to transfer all data to the server.
Read services, Server --> Client
●
Initiate SDO Upload Expedited
The
Expedited SDO Upload
service is used for the accelerated
trans
mission of ≤ 4 bytes. The server responds with the result of the
upload request and the required data, in the event of successful execution.
●
Initiate SDO Upload Normal
The
Initiate SDO Upload
service is used for an individual transmission of
data, if the number of bytes can be accepted by the mailbox, or if a
segmented transmission is to be started with more bytes. The server
responds with the result of the upload request and the required data, in the
event of successful execution.
●
Upload SDO Segment
The
SDO Upload Segment
service is used to transfer the additional data
that could not be transferred with the
Initiate SDO Upload
service
response. The server starts as many Upload SDO Segment services as
are required to transfer all data from the server.