VL Command - Speed Limits

Configure up to 16 independent speed limits that generate signals when exceeded.

What is it for?

🚗 Speed control — Monitor that vehicles do not exceed established limits
📊 Driving analysis — Record speeding events
🛡️ Road safety — Alert in real time about dangerous speed
📋 Regulatory compliance — Document adherence to legal limits
💰 Fuel savings — Identify high-speed driving

Command Summary

Action	Command	Description
Configure	`SVLaabcccde`	Define limit with all parameters
Query	`QVLaa`	Get configuration of a limit
Response	`RVLaabcccde`	Response format

Parameters

Field	Description	Values
aa	Limit index	`00`-`15` (16 available limits)
b	Status	`E` = Enabled, `D` = Disabled
ccc	Speed in km/h	`000`-`999`
d	Filter mode	`0` = No filter, `1` = GPS filtered
e	Stabilization time	`0`-`9` seconds

The GPS filter smooths speed readings, reducing false alarms from momentary fluctuations. The stabilization time requires the speed to exceed the limit for X seconds before activating the signal.

Associated Signals

Signals	Description
`VL00` - `VL15`	Activated when corresponding limit is exceeded

Examples

Basic 50 km/h limit


>SVL00E05001<
// Limit 00: Enabled, 50 km/h, no filter, 1s stabilization

80 km/h limit with GPS filter


>SVL01E08012<
// Limit 01: Enabled, 80 km/h, GPS filtered, 2s stabilization

Highway limit 120 km/h


>SVL02E12013<
// Limit 02: Enabled, 120 km/h, GPS filtered, 3s stabilization

Query configuration


>QVL00<
// Response: RVL00E05001

Disable a limit


>SVL00D05001<
// Keeps configuration but deactivates the limit

Use in Event Rules

SMS alert for speeding


>SRL80E;TRG=VL00+;ACC={GSMS Speed violation: >50km/h| GGPXXL}<
// Send SMS when exceeding 50 km/h

Periodic report while exceeding limit


>STD05 E 00060 00000<  // 60-second timer
>SRL81E;TRG=TD05+;CND=VL01;ACC={GGPXXL}<
// Report every 60s while exceeding limit 01

Zone-based speed system


// Urban zone: 50 km/h
>SVL00E05012<
>SRL82E;TRG=VL00+;CND=RG00;ACC={GSMS Speed violation in urban zone}<
 
// School zone: 30 km/h
>SVL01E03013<
>SRL83E;TRG=VL01+;CND=RG01;ACC={GSMS ALERT: Speed violation in school zone!}<

Speed event counter


>SRL84E;TRG=VL00+;ACC={SOUT00 1}<
// Increment counter each time limit is exceeded

To avoid false alarms, use the GPS filter (d=1) and a stabilization time of at least 2 seconds (e>=2) for low limits.

Compatibility

💾Firmware:v1.00.00

SPLegacy

ULLegacy

MTLegacy

C3Legacy

C5Legacy

SP-IOT

SM-IOT

ZE-IOT