---
title: "Command VR"
slug: "command-vr"
updated: 2024-07-04T11:07:39Z
published: 2024-07-04T11:07:39Z
canonical: "docs-linescan.alliedvision.com/command-vr"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs-linescan.alliedvision.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Command VR

Command VR is used to query the current firmware version or release of the XLC4 control unit.

## Structure

| Command | Notes |
| --- | --- |
| CommandID | VR | VR works in all XLC4 operating modes |
| Parameter | None |  |
| Parameter | Value | Description |
| None |  | The current version and release of the XLC4 firmware is coded in the return value |
| Response |
|  | vr , space , version , “,” , release |
| General notes |
|  |  |

## Example

VR

VR 005 , 010