---
title: "system.sfc.setVariables"
description: "Sets any number of variables inside a currently running chart."
---

# system.sfc.setVariables

> Sets any number of variables inside a currently running chart.

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

## Description
## Client Permission Restrictions
[Permission Type](../../../ignition-modules/vision/vision-project-properties/vision-project-properties.md#vision-permissions-properties): SFC 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.sfc.setVariables(instanceId, [stepId], variableMap)`

### Parameters
Type | Parameter | Description 
------- | ------- | ------
String| `instanceId` | The instance identifier of the chart.
String| `stepId` | The id for a step inside of a cart. If omitted the function will target a chart scoped variable. [optional]
Dictionary[String, Any]| `variablesMap` | A dictionary containing the name:value pairs of the variables to set.

### Returns
Nothing
### Scope
Gateway, Vision Client, Perspective Session

:::note
Omitting the **stepId** parameter will cause the function to target a chart scoped variable. If the variable is persistent to the whole chart, or used in multiple different steps, then this parameter should be omitted.

If a stepId parameter is used, then the function will target a step scoped variable. The step associated with the stepId must be the currently active step.
:::

## Code Examples
```python title="Code Snippet"
# Get the instance ID from the selected chart on a SFC Monitor component
id = event.source.parent.getComponent('SFC Monitor').instanceId
  
# Create a Python dictionary of values. This example assumes there are variables on the
# chart named chartParam and counter. The script will set these to 1, and 0 respectively
dict = {"chartParam":1, "counter":0}
 
# Set the variables on the chart
system.sfc.setVariables( id, dict)
```