---
title: "How To Restrict Acknowledgement on the Vision Alarm Status Table Component"
---

# How To Restrict Acknowledgement on the Vision Alarm Status Table Component

> In order for operators to acknowledge alarms, the correct permission must be assigned. This example shows how to set permissions to acknowledge alarms for users in the **Operator** role. You can setup permissions for any role, user and user source in your system.

## Security for Alarm Acknowledgement
If you want to restrict who can use the Acknowledge button, there is the **Show Ack Button** in the Property Editor that can be set to '**False**.'  By setting the **Show Ack Button** to '**false**,' this hides the Acknowledge button on the Alarm Status Table.  

1. Select the Alarm Status Table component, and click the **Show Ack Button** binding ![](../binding.png) icon to open the Property Binding window.
1. Under **Property Binding Type**, select **Expression**.
1. Click the **Function** ![](../function.png) icon and scroll down to **Users**, and select '**hasRole**.'  This enters the function name.
1. Edit the expression to read: **hasRole("Operator")**
1. Click **OK**. 

If you currently have the "Operator" role you will notice that the **Show Ack Button** property is now '**true**,' otherwise, it will be '**false**.'

![](how-to-restrict-acknowledgement.png)