---
title: "Command ER"
slug: "command-er"
updated: 2024-07-04T11:10:10Z
published: 2024-07-04T11:10:10Z
canonical: "docs-linescan.alliedvision.com/command-er"
---

> ## 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 ER

Command ER is used to query the error state of the XLC4 control unit.

## Structure

| Command | Notes |
| --- | --- |
| CommandID | ER | ER works in all XLC4 operating modes |
| Parameter | None |  |
| reset |  |
| Parameter | Value | Description |
| None |  | The error state is queried |
| reset | “0” | The error state is reset |
| Response |
|  | er , space , err_state |
| General notes |
|  | You can only reset the error state when the error cause is solved. For more information about the error codes refer to [Error codes](/v1/docs/error-codes). |

## Example

| Query | Response | Action |
| --- | --- | --- |
| ER | er 205 | The error 205 is set |
| ER 0 | er 0 | The error state is reset |
| ER | er 0 | There are no errors set |