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TR-Electronic GmbH 2016, All Rights Reserved
11/20/2018
TR - ECE - BA - DGB - 0128 - 01
Page 103 of 127
5 Commissioning
5.1 CAN
– interface
The CAN-Bus-Interface is defined by the international norm ISO/DIS 11898 and
specifies the two lowest layers of the ISO/DIS CAN Reference Model.
The CAN-BUS-Interface with the BUS-Driver PCA82C251 is galvanic isolated of the
measuring system electronic and becomes the power over internal DC/DC-converter.
There is no external power supply necessary for the CAN-BUS-Driver.
The conversion of the measuring system information to the CAN message format
(CAN 2.0A) is done by the CAN-controller SJA1000. The function of the CAN-
controller is controlled by a watchdog.
The CANopen Communication Profile (CIA standard DS 301) is a subset of CAN
Application Layer (CAL) and describes, how the services are used by devices. The
CANopen Profile allows the definition of device profiles for decentralized I/O.
The measuring system with CANopen-protocol support the Device Profile for Encoder
(CIA Draft Standard Proposal 406, Version 3.2).
The measuring systems support
the extended functions in Class C2 .
The communication functionality and objects, which are used in the encoder profile,
are described in a EDS-File (Electronic Data Sheet).
When using a CANopen Configuration Tool (e.g.: CANSETTER), the user can read
the objects of the measuring system (SDOs) and program the functionality.
The selection of transmission rate and node number is done by LSS.
5.1.1 EDS file
The EDS (electronic datasheet) contains all information on the measuring system-
specific parameters and the measuring system’s operating modes. The EDS file is
integrated using the CANopen network configuration tool to correctly configure or
operate the measuring system.
The EDS file has the file name
"CMx36M_CANopen.eds"
.
Download:
www.tr-electronic.com/f/TR-ECE-ID-MUL-0054
