Annunciator Overview,
Continued
Acknowledge Keys and
Associated LEDs
Piezo Alert Signal
The operation of Graphical LCD Annunciator Acknowledgement Keys and
associated LEDs are defined the same as their counterparts on the Master System’s
Front Panel.
Annunciation of the ALARM, PRIORITY 2, SUPERVISORY, and TROUBLE events
are programmable via the 4 100 programming unit. (See “Progranming.“)
Once a point is acknowledged (ACKed) at the LCD annunciator, its ACKed status is
taken into account in all the corresponding LED tracking modes. In other words, the
change in point status is system-wide.
The Graphical LCD Annunciator Piezo Alert Signal (Piezo) is updated in a
prioritized manner similar to the Piezo on the 4 100 FACP:
1. Key feedback
2. Alarm, Priority 2 (beeping)
3. Supervisory/Trouble, Communication loss (steady ON)
4. Alert Condition (four programmable LEDs)
Piezo activation due to a key press is protected by the Key Switch.
Any Alarm / Priority 2 / Supervisory / Trouble / Alert condition at the Graphical LCD
Annunciator causes an automatic activation of the Piezo.
If the Piezo is activated due to Alarm I Priority 2 / Supervisory I Trouble I Alert
condition(s) can be silenced locally with the first key press of the appropriate ACK Key,
name1.y - ALARM ACK, PRI2 ACK, SUPV ACK, or TBL ACK - given the current
Protection Level is valid to perform the operation. However, the appropriate LED will
remain flashing until all of the abnormal conditions are acknowledged.
Note: The Graphical LCD Annunciator Piezo can not be controlled by SMPL or
Custom Control user programming.
Continued on next page
20
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