GE POWER LEADER DEH-210 User Manual page 49

From the Event Logger's perspective, there are two parts to configuring the
Annunciator Panel. First, each DDE Item that will be displayed on the Annunciator
Panel wizard must be added (using the Add Items dialog). For the example we're
discussing, we'll assume you've created a DDE Item named Trip1. Each DDE item
will connect to an individual tile in the Annunciator Panel wizard.
The second part consists of defining events which will turn individual DDE items
ON or OFF. Each DDE item (or Annunciator Panel tile) can be turned on or off by
any number of device events you define. The events are logically ORed together to
determine ON or OFF conditions; i.e., if any of the events occurs, the DDE item is
ON; if none of the events have occurred, the DDE item remains OFF.
We'll continue the relay example we began above. For example, you might
configure the Trip1 DDE Item to be ON if any of the following events occurs: the
relay is tripped, or the relay reports an error condition, or the relay senses an
overvoltage condition. The Annunciator Panel wizard displays a grey indicator tile
for the relay for as long as the DDE item remains in the OFF condition. If the
Annunciator Panel wizard sees the DDE Item change from OFF to ON, it reacts by
changing the indicator tile from grey to red. The Event Logger Annunciator Panel
logic will also change the state of a DDE Item in response to actions performed at
the Annunciator Panel Wizard. The user can both acknowledge and reset individual
Annunciator DDE Items. The following diagram shows the relationship of the
Annunciator Panel wizard, the Event Logger, and the PMCS DDE Server.
PMCS Interface Toolkit Configuring and Using PMCS Wizards 43