navSpeedLimitAlert (Functionblock)

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Architecture:

NX32 / NX32L

Device support:

MX2 turbo/encore/warp, AX9 turbo, NX-200, NX-400, NX-900

Firmware version:

4.70 / 1.30.00

Nav. API level:

8


The function block returns information about Speed Limit Alerts(SLA).

Note that the SLA is only valid after an "SLA" event is raised; the event will be removed when this function block is called.

An "SLA" event is raised when SLA is enabled with navSpeedLimitAlertSetup and the speed has been exceeded.

 

 

Input:

None.

 

 

Output:

time : DINT

The timestamp for the alert.

 

latitude : DINT

The latitude of the position of the alert.

 

longitude : DINT

The longitude of the position of the alert.

 

speed : INT

The speed at the time of the alert.

 

speed_limit : INT

The speed limit at the time of the alert.

 

max_speed : INT

The maximum speed since the last alert.

 

type : SINT

The type of alert:

0

- Speeding has begun.

1

- Speed limit has changed.

2

- Speeding has ended.

3

- Internal error.

4

- Invalid alert. If over 50 alerts have been queued without being received by the RTCU device, the queue is cleared and this alert is added.

Can also happen if changing the SLA setup while driving.

 

ready : BOOL

TRUE:

If data is ready.

FALSE:

If data is not ready.

 

Declaration:

FUNCTION_BLOCK navSpeedLimitAlert;
VAR_OUTPUT
  ready       : BOOL;
  type       : SINT;
  time       : DINT;
  latitude   : DINT;
  longitude   : DINT;
  speed       : INT;
  speed_limit : INT;
  max_speed   : INT;
END_VAR;

 

Example:

INCLUDE rtcu.inc
 
VAR
  slaRcv : navSpeedLimitAlert;
END_VAR;
 
FUNCTION ReadSLA;
  slaRcv();
  IF slaRcv.ready THEN
    DebugMsg(message := "*** SLA received ***");
    DebugFmt(message := "-time=\4", v4 := slaRcv.time);
    DebugFmt(message := "-type=\1", v1 := slaRcv.type);
    DebugFmt(message := "-latitude=\4", v4 := slaRcv.latitude);
    DebugFmt(message := "-longitude=\4", v4 := slaRcv.longitude);
    DebugFmt(message := "-speed=\1", v1 := slaRcv.speed);
    DebugFmt(message := "-speed_limit=\1", v1 := slaRcv.speed_limit);
    DebugFmt(message := "-max_speed=\1", v1 := slaRcv.max_speed);
  END_IF;
END_FUNCTION;
 
THREAD_BLOCK navMonitor;
VAR
  event : INT := 0;
END_VAR;
 
WHILE event <> -1 DO
  event := navWaitEvent(timeout := -1);
  CASE event OF
     ...
    15: ReadSLA();
     ...
  END_CASE;
END_WHILE;
END_THREAD_BLOCK;