---
title: "Read and Write Data"
slug: "read-and-write-data"
updated: 2024-01-30T14:09:44Z
published: 2024-01-30T14:09:44Z
canonical: "kb.dataparc.com/read-and-write-data"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://kb.dataparc.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Read and Write Data

### GD(tagnumber)

Get data for input tag “tagnumber”.

**Syntax**: *result* = *GD(tagnumber)*

**Remarks**: GD returns the current value for the input tag in location “tagnumber”.

**Example**: This example gets the current value for Input tag number 9.

Result = **GD**(9)

### Tag(tagnumber, writevalue,*datetime*)

Write data to output tag “tagnumber”.

**Syntax:** *Tag(tagnumber, writevalue,optional datetime)*

**Remarks:** This function writes the value “writevalue” as the current value of the output tag in location “tagnumber”. It defaults to writing that value with a timestamp equal to current time. An optional third parameter allows the user to set a specific timestamp to write out data, which should be a time equal to current time or in the past, not a future point.

**Example:** This example sets the current value for the output tag in location 9 to 30.5.

**Tag**(9, 30.5)