2
Functional Description
10/67 ekr 500 digital Unit Touch – CANopen User Gateway
2.3 Communication Objects
The following communication objects are used for the communic-
ation of the ekr 500 digital Unit Touch web guiding controller with
the customer control system:
Communication Object Utilisation
SDO Service Data Object
Parameterization of the controller, status requests
The Service Data Objects are used for the parameterization and
control of the web guiding controller and for status requests.
PDO Process Data Object
High-speed exchange of process data (real-time data)
The Process Data Objects enable the exchange of real-time
process data such as the current web edge position.
SYNC Synchronization Message Synchronization of multiple CAN nodes
EMCY Emergency Message Transmission of error messages
NMT Network Management Network service
HEART-
BEAT
Error Control Protocol Supervision of the communication participants by cyclic messages
In addition, there are defined further communication objects for
special applications sent either from the controller or from the
higher-level control system.
This interface description only describes the manufacturer
specific Service Data Objects (SDOs) and Process Data
Objects (PDOs). The other standardized communication
objects used for the communication of the web guiding
controller with the customer control system are described
in the European Standard EN 50325-4.