socomec DIRIS Digiware D-70 - Admin Profile Configuration

37EN
DIRIS DIGIWARE DC - 545830B - SOCOMEC
9. COMMUNICATION
9.1. General information
DIRIS Digiware communicates via RS485 using the Modbus protocol. RS485 communication is available at a single
point either on the DIRIS Digiware D display or on the DIRIS Digiware C-31 system interface module. It takes place
via an RS485 serial link (2- or 3-wire) in accordance with the Modbus RTU protocol.
With the RS485 link, DIRIS Digiware can be directly connected to a PC, a PLC, a DIRIS G gateway or a
DIRISDigiware D display (see the corresponding manual for more details) to exploit the data.
The Modbus protocol requires a dialogue with a master/slave structure. The mode of communication is the RTU
(Remote Terminal Unit). In a standard setup, an RS485 link enables the interconnection of 32 RS485 devices to a
PC (with DIRIS Digiware C-31 counting as one device), a PLC or the gateway over a distance of 1,200 metres.
Example of architecture in combination with the DIRIS G gateway:
Webserver
WEBVIEW
RS485RS485 RS485
Ethernet
Digiware C-31
DIRIS G DIRIS B DIRIS DIRIS B
120 Ω 120 Ω
Digiware Bus
Termination
Digiware Bus
9.2. RS485 and Digiware Bus rules
A certain number of rules must be followed when DIRIS Digiware is connected using RS485. These rules are set
out in the paragraphs below.
PC
RS485
120 Ω 120 Ω
RS485
Ethernet
DIRIS Digiware C-31
DIRIS G DIRIS B
Digiware Bus
Termination
Digiware Bus