Sign Messages

A sign message is an immutable record containing all information needed to display a message on a DMS. They are created when operators compose them, and also when device actions are scheduled. They are deleted automatically after being unused for a few minutes.

Sign configuration determines the type of sign that can display the message.

The MULTI string contains the text and/or graphics of the message.

The msg_owner is a string containing 3 fields, separated by semicolons (system; sources; user):

• system: normally "IRIS"; possibly another system
• sources: message sources, separated by + (operator, blank, incident, lcs, gate_arm, alert, external, reset or schedule + action tag source)
• user: name of user who created the message

Sticky indicates the message should persist even if communication or power is lost.

Flash Beacon indicates whether an associated beacon should flash.

Pixel Service indicates whether the sign should perform scheduled pixel service while the message is displayed.

Message Priority

Priority determines precedence between operator messages and device actions.

Messages composed by operators have high_1 priority. Cleared incidents use the low_sys priority. Messages sent by external systems are assigned to medium_sys.