User guide

C
-
Bus OPC installation
User Guide
12
© Schneider Electric 2011
1.8.1 How the OPC Data Access interface works
A simple example of a C-Bus OPC Server implementation is to send
lighting information to and receive lighting control messages from the
OPC Client. Within the C-Bus, there is one network which contains a
Lighting application which controls four dimmer output units, each being
named FLR1_DIM1, FLR1_DIM2, FLR1_DIM3, and FLR1_DIM4.
In the graphic below, the C-Bus network consists of a dimmer and a 4 key
input unit. The C-Bus network is connected to the Ethernet via a CNI unit.
Figure 6: C-Bus connecting to a TCP/IP network
Ethernet (TCP/IP)
OPC Server
OPC Client
Dimmer
CNI
C-Bus network
4 key input
unit
C-Bus C-Gate Server
Transmitting Lighting Compatible lighting data to the OPC Client
The sequence diagram below illustrates the messaging sequencing
between a C-Bus network, a C-Gate server, a C-Bus OPC Server, and the
OPC Client for sending a lighting message originating from a 4 key input
unit.
Figure 7: OPC Lighting message sequence