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XtrapulsPac - User Guide
Chapter 3 – Reference
Index 0x23A1
Name TPDO
Control
Object Code
ARRAY
Number of Elements
4
Value Description
Sub Index
1-4
Description
TPDO control for TPDO n.
Data Type
Unsigned8
Access rw
PDO Mapping
No
Value Range
0..255
Default Value
0
3.1.1.6 - Service Data Objects (SDO)
The SDO is a communication channel with 2 basic characteristics:
- Client/Server relationship,
- Object Dictionary.
Client/Server:
This is a relationship between a single client and a single server (Servo Drive). A client issues a request
(upload/download) thus triggering the server to perform a certain task. After finishing the task, the server answers
the request.
Object Dictionary:
All objects (variables, constants, records...) of the server are defined as a list of objects where each element is
appointed by an index and a sub-index. This object list is called object dictionary. This object dictionary allows the
client accessing all objects of the server. The Servo Drive object dictionary consists of 2 parts: the communication
profile (DS-301) for the objects related to the CAN communication and the device profile (DSP-402) for objects
related to the drive functionality.
For more information about the SDO protocol, please report to the CiA DS-301 version 4.01 specification.