User guide

Overview

1.9.2 Quality of OPC Alarms and Events data and logged data

The C-Bus OPC Server provides information on the quality of the

information coming from the OPC Alarms and Events as well as logging

data to track the behaviour of the interface over time.

Quality of OPC Alarms and Events data

The OPC Alarms and Events interface evaluates the quality of information

coming from C-Gate and provides a quality rating.

Logging of OPC Alarms and Events data

The C-Bus OPC Server generates logging data during start/restart and

stopping event sequences as well as operational OPC transmission events.

A subset of the log information is displayed in the M

ESSAGES

tab. The full

log information can be read using SmartInspect logging viewer. The

location of C-Bus OPC Server log files is at:

C:\Clipsal\CbusOpcServer\Logs. There are log entries with "OPC

AE" in the text for whenever events are sent, alarm conditions are

changed, acknowledgements are received from OPC Clients, and

acknowledgements are sent to C-Bus units.

1.9.3 How the OPC Alarms and Events interface works

The sequences below show firstly how alarm conditions are transmitted

and then translated to OPC messages for the 12 channel architectural

dimmer. The second sequence shows how acknowledgements from the

OPC Client are translated from the OPC to Error Reporting messages.

Sending error conditions to the OPC Client

The sequence diagram below illustrates the messaging sequences for

sending an error condition event between a C-Bus network, a C-Gate

server, a C-Bus OPC Server, and the OPC Client.

Figure 12: Sequence showing OPC Client alarm error condition message

Architectural

Dimmer

Seq 1

OPC Server OPC ClientC-Gate Server

Seq 2

Seq 3