Linear Variable Writing

## Linear Variable Writing

![](/media/202601/f936707e-3603-4d29-96f6-9c25916f67d7_1768641334.png)

## Module Principle
Change the value of the Linear variable to be modified to the data of the connected output port.

## Usage Scenarios
Used when the value of a Linear variable needs to be modified, especially when outputting the value of an output port to the outside of a container using a container module such as if.

## Usage Method
Prerequisite: Create a flow containing a Linear Variable Creation module in the VG3 project.
1. Function Addition Tree &rArr; Auxiliary Tools &rArr; Hardware Control &rArr; Linear Variable Writing Module, drag or double-click to add to the specified position in the flow.
2. Select the communication port to be output. When the communication port is a server, fill in the specified client IP according to the specific situation. Generally, it is not necessary to fill in.

### Pre/Post-Sequence Modules
There must be a Linear Variable Creation module before the module.

## Parameter Configuration Description

![](/media/202601/7e722ca8-2b82-46db-b0ff-4307f65e4d3e_1768641462.png)
Name Column in Table: Double-click to modify the selected name.
Linear Variable in Table: Click to pop up to set Linear variable data.
Data Type in Table: Only used to display the data type of the Linear variable.
Subscribe in Table: If checked, connect to the output port of the same data type above the module; if not checked, double-click to modify the value to set the Linear variable.
Data Source in Table: Only after the Subscribe column is checked, click to select the output port of the module above the module.
Modify Value in Table: When the Subscribe column is not checked, double-click to manually set the value of the Linear variable. When the Linear variable is a structure or array, the structure setting interface and array setting interface will pop up.
Table operations include the following:
1. Plus sign: Click to add the input port to be output.
2. Minus sign: Click to delete the selected input port.
3. Clear: Click to clear all added input ports.

## Output Description

![](/media/202601/1d744b5c-350f-4bbc-9554-9a9cb45d9391_1768641525.png)
1. Run Result: If the Linear variable is set successfully, return true, otherwise return false.

## Precautions

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Click here to jump to the corresponding Chinese manual page: [Linear Variable Writing](/doc/215)