---
title: "system.opchda.readRaw"
description: "Reads raw values from the OPC-HDA server."
---

# system.opchda.readRaw

> Reads raw values from the OPC-HDA server.

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

## Description
## Client Permission Restrictions
This scripting function has no [Client Permission](projects\project-properties\project-properties.md#client---permissions) restrictions.

## Syntax
`system.opchda.readRaw(serverName, itemIds, startDate, endDate, maxValues, boundingValues)`

### Parameters

|Type|Parameter|Description|
|--|--|--|
|String| `serverName` | The name of the defined OPC-HDA server to read.|
|List |`itemIds` | A list of item ids to read.|
|Object| `startDate` | The starting date/time of the query.|
|Object| `endDate` | The ending date/time of the query.|
|int|`maxValues`| The maximum number of values to return. 0 or less means unlimited.|
|Boolean| `boundingValues`| A boolean indicating whether or not the "bounding values" should be included in the result set. The bounding values provide a value exactly at the start and end dates, but may be resource-intensive to retrieve.|
### Returns
**ReadResults[]** - A list of read results which is one-to-one with the item IDs passed in. The ReadResult object has a `serviceResult` quality property that indicates whether the call was successful, and is itself a list of QualifiedValues.
### Scope
All