---
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](../../../ignition-modules/vision/vision-project-properties/vision-project-properties.md#vision-permissions-properties) 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.
Integer| `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
**List[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
Gateway, Vision Client, Perspective Session

## Code Examples
```python title="Example #1"
# This example will read raw data from a Matrikon server between two specified dates.
# Declare start and end dates
start = system.date.getDate(2022, 3, 14)
end = system.date.now()
 
# Call system function and print results
readValue = system.opchda.readRaw("Matrikon",[1],start,end,0,False)
print readValue
```