Opc Alarms And Events Area Space - ABB SPA OPC Server User Manual

Section 3 Features
Object status
In use
Device connection status
Transparent SPA

3.3 OPC Alarms and Events Area Space

The area space resembles the OPC Data Access Namespace, but instead of signals there
are alarm and event sources. The signals that generate events are event sources in the area
space. Signals that do not generate events are not included in the area space.
32
OPC Alarms and Events Area Space
Integer
Communication status of the device, see Status
Codes on page 57 for status code values and
explanation.
Integer
Controls whether the SPA OPC Server tries to
communicate with the device. When the SPA
device is taken into use (In use set to value 1),
the SPA OPC Server tries to establish
communication with the device. When a SPA
device is taken out of use (In use set to value
0), the SPA OPC Server does not communicate
with the device anymore.
Boolean
The communication connection status of the
device. If the device is communicating properly,
the value is true. If the communication with the
device is broken, the value is false.
String
To write and read SPA parameters using
transparent SPA messages. Transparent SPA
enables a direct communication with the device
using the SPA messages. The SPA command is
written to "Transparent SPA" OPC item, and
when the answer is received, it can be read
from the same item.
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