---
title: "system.opchda.replace"
description: "Replaces values on the OPC-HDA server if the given item ID exists."
---

# system.opchda.replace

> Replaces values on the OPC-HDA server if the given item ID exists.

This function is used in **Python Scripting**.

## Description
## Client Permission Restrictions
[Permission Type](projects\project-properties\project-properties.md#client---permissions): OPC Server Management

Client access to this scripting function is blocked to users that do not meet the role/zone requirements for the above permission type. This function is unaffected when run in the Gateway scope.

## Syntax
`system.opchda.replace(serverName, itemId, value, date, quality)`

### Parameters

|Type|Parameter|Description|
|--|--|--|
|String |`serverName` |The name of the defined OPC-HDA server.|
|String |`itemId` | The item ID to perform the operation on.|
|Object |`value`| The value to replace.|
|Object| `date` |The date to replace.|
|int |`quality` | The quality to replace.|
### Returns
**int** - The items quality resulting from the operation.
### Scope
All