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Operation and communication
Additional Information
CAN in Automation (CiA)
International Users and Manufacturers Group e.V.
Kontumazgarten 3
90429 Nuremberg, Germany
•
CiA Draft Standard V4.02
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CiA Draft Standard 303 LED-Behavior
Process data objects (PDOs)
Service data objects (SDOs)
Are used for real-time data exchange
Permit access to the object directory; each
SDO assembles a point-to-point service com-
munication channel.
Typically messages with high priority
Messages with lower priority
Synchronous and asynchronous data transfer Typically asynchronous data transfer
Cyclical and noncyclical transmission
Typically noncyclical transmission
Data of the PDOs can be configured via SDOs Use of the data field is dictated by the CMS
(CAN Message Specification) Multiplexed
Domain Protocol.
Preformatted data field
Access to an entry in the device object direc-
tory via index and subindex.