CAN Communication
General Information
EPOS4 Communication Guide
3-22 CCMC | 2019-11 | rel8759
Table 3-6 CAN communication – Abbreviations
Table 3-7 CAN communication – Terms
PDO Process Data Object – object for data exchange between several devices
PLC Programmable Controller – can serve as a CAN Master for the EPOS4
RO Read Only
RW Read Write
SDO
Service Data Object – peer-to-peer communication with access to the device’s
Object Directory
WO Write Only
Term Description
CAN Client
or
CAN Master
A host (typically a PC, PLC, or other control device) supervising the nodes of a
network
CAN Server
or
CAN Slave
A node in the CAN network that can provide service under the CAN Master’s control
Object
A CAN message with meaningful functionality and/or data. Objects are referenced
according to addresses in the Object Dictionary.
Receive “received” data is being sent from the control equipment to the EPOS4
Transmit “transmitted” data is being sent from the EPOS4 to the other equipment
Abbreviation Description
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