---
title: "Command ST"
slug: "command-st"
updated: 2024-07-04T11:10:02Z
published: 2024-07-04T11:10:02Z
canonical: "docs-linescan.alliedvision.com/command-st"
---

> ## 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 ST

Command ST is used to read and set the Corona II temperature warning and temperature error limits.

## Structure

| Command | Notes |
| --- | --- |
| CommandID | ST | ST works in all XLC4 operating modes |
| Parameter | None |  |
| channel |  |
| temperature-pair |  |
| Parameter | Value | Description |
| None |  | The current values for channel A are queried |
| channel | “A” | The current values for channel A are queried and set |
| “B” | The current values for channel B are queried and set |
| “C” | The current values for channel C are queried and set |
| “D” | The current values for channel D are queried and set |
| temperature-pair | Two comma-separated integer values | The two values are the new warning and error temperature levels [°C]. They are stored permanently in the Corona II module. |
| Response |
|  | st , space , channel , space, warning-level , error-level |
| General notes |
|  | Applicable for firmware release from 4.25. Changes are applied after switching on again. Automated switch-off at temperature limit only for firmware release from 4.25. The temperature limit values must be between 0 °C and 90 °C. |

## Error case

An error (err 101) is set when the following happens:

- There is no I2C control unit connected to the channel
- The values are not in the defined range

If the values exceed the defined range the XLC4 control unit switches off the Corona II modules. The error LED is set, the error output pin is set to high and err 205 is set. There is no automatic startup after cooldown of the Corona II module.

Reset the error witch the command ER 0 or by switching on again.

## Example

| Query | Response | Action |
| --- | --- | --- |
| ST | st 70,90 | The values for channel A are displayed: - Warning level temperature limit: 70 °C - Error level temperature limit: 90 °C |
| ST B 65,75 | st B 65,75 | The new values for channel B are set: - Warning level temperature limit: 65 °C - Error level temperature limit: 75 °C |
| ST B 65,75 | st B 65,75 | The new values for channel B are set: - Warning level temperature limit: 65 °C - Error level temperature limit: 75 °C |