Rockwell Automation 2706 DL20 SERIES G USER MANUAL User Manual

Page 35

Chapter 4
Creating and Editing Messages

4–9

Flashing Messages

The next attribute prompt is self explanatory:

FLASH MSG? N

Answering Yes to this prompt causes the message to flash once per second
when the message is triggered.

Relay Operation

ATTENTION: Use relay for annunciator purposes only. Do not
use it for control.

The DL20 has a single-throw, double-pole internal relay. This relay can be
energized by messages. The relay attribute prompt looks like this:

TURN RELAY ON? N

If you answer Yes to this prompt, the relay is energized when the message is
triggered, and de-energized when the message has terminated its display.

Important: The relay does not stay energized between message displays;
triggering two messages with this attribute selected does not guarantee that
the relay will remain energized continuously between the two messages.
Similarly, an auto repeat message does not guarantee a continuously
energized relay.

The relay can also be energized by the battery low detector circuit within the
DL20. This option is described in Chapter 8. If the relay is used to flag a
low battery, it cannot be controlled by message attributes.