User's Manual

DRAFT TrimTrac 1.5 Technical Manual v0.3ab 68

1. If HPA Status is set:

a. “1=Activated”, then go to immediately to the IDLE state;

b. “2=Sent”, then ignore all data messages received prior to the

receipt of SET_ALERT_STATE message and:

i. If Position Age is set “1=Aged”, then go immediately to the

IDLE state; or

ii. If Position Age is set “0=Current”, then go to the IDLE state

upon expiration of HPA Query Timeout, T17.

If MPA Status is set:

“1=Activated”, then go to immediately to the IDLE state;

b. “2=Sent” then ignore all data messages received prior to the receipt

of SET_ALERT_STATE message and go immediately to the

IDLE state.

3. If LPA Status is set:

a. “1=Activated”, then go to immediately to the IDLE state;

b. “2=Sent” then ignore all data messages received prior to the receipt

of SET_ALERT_STATE message and go immediately to the

IDLE state.

4. During the QUERY state, any alert (High, Low, Medium) status can be

changed from “2=Sent” or “3=Acknowledged” to “0=Clear”,

“3=Acknowledged”, or “X=Do not care” upon receipt of the appropriately

configured SET_ALERT_STATE message.