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EN
DIRIS DIGIWARE - 546420C - SOCOMEC
9. communication
9.1. general information
With DIRIS Digiware, communication is available at a single point from the system interface. Depending on the
system interface used, DIRIS Digiware can communicate over Ethernet or over an RS485 serial link (2- or 3-wire)
via multiple protocols (Modbus RTU, TCP, BACnet and SNMP).
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 meters.
BACnet and SNMP protocols are available from the DIRIS Digiware D-70 display. For more information about these
protocols, please refer to the instruction manual of the DIRIS Digiware D-70.
Example of architecture in combination with the DIRIS G gateway:
Webserver
WEBVIEW
RS485
RS485
RS485
Ethernet
Digiware C-31
DIRIS G
DIRIS B
DIRIS
DIRIS Digiware U
Digiware bus
DIRIS Digiware S
DIRIS B
120 Ω
120 Ω
Bus Digiware
Termination
9.2. RS485 and Bus DIRIS Digiware rules
A certain number of rules must be respected when DIRIS Digiware is connected using RS485. These rules are set
out in the paragraphs below.
Digiware Bus
PC
RS485
120 Ω
120 Ω
RS485
Ethernet
DIRIS Digiware C-31
DIRIS G
DIRIS B
DIRIS Digiware U
DIRIS Digiware S
Bus Digiware
Termination
