CANDPSX user manual rev 2 Page 6 of 42
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1 INTRODUCTION
1.1 PRODUCT OVERVIEW
The CANDPSX module is a gateway serving as a coupler between a CAN bus system and a
Profibus-DP network. It supports three operating modes for data exchange between the two
networks:
1. Profibus-DP slave / CAN (see § 13).
2. Profibus-DP slave / CANopen Master (see § 13).
3. Profibus-DP slave / CANopen Slave (see § 21).
CAN message programming and mapping are the principles underlaying the function of the
module. For each byte making up a CAN message, they allow to define the offset of the
corresponding byte in the Profibus dual port (see § 23).
The CANDPSX module is endowed with a standard 9-pole connector for the Profibus network and
a standard 5-pole open-style connector for the CAN bus network (see § 38). There is also a RS232
port supporting the Modbus protocol for module configuration (from PC running SoftTune, from PC
running a Modbus configurator, from PLC, etc.)
CANDPSX is also endowed with 9 LEDs for immediate diagnostics.
All the functions of the module can be configured and the configuration can be saved to non-
volatile memory. It is also possible to save the settings to file. The board is supplied together with a
setup program containing a configuration tool and a firmware upgrade tool.
The configuration software, named SoftTune, has an HTML interface supporting the
implementation of configuration pages to ease the interaction with operators.
The module is designed for installation on standard omega support.
1.2 PROFIBUS
A processor implementing the full PROFIBUS-DP slave protocol manages the interface with the
Profibus system. The module can be configured in a Profibus network by means of the GSD file,
which contains all the information on characteristics of communication and on data configuration. A
word (16 bits) is the minimum unit of data that can be exchanged (see § 32).
Below you find the characteristics of Profibus communication on CANDPSX:
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