Global Variable Invalidation

## Global Variable Invalidation

![](/media/202601/91f25ec3-58a7-4514-a156-471547551d12_1769060910.png)

## Module Principle
Turn the specified global variable to invalid.

## Usage Scenarios
Mostly used to control the invalidation of global variables, and then realize flow control through Global Variable Writing module valid after running and Global Variable waiting for global variable valid.

## Usage Method
1. Function Addition Tree &rArr; Auxiliary Tools &rArr; Variable Processing &rArr; Global Variable Invalidation Module, drag or double-click to add to the specified position in the flow.
2. Add the global variable to be invalidated.

## Parameter Configuration Description

![](/media/202601/bfdf5ea1-1f64-457a-8e93-e8e5fb243c8d_1769068833.png)
Global Variable in Table: Click to pop up the global variable menu, select the global variable to be read.
Data Type in Table: Display the data type of the global variable.
Table operations include the following:
1. Plus sign: Click to add a group of read global variables and corresponding output ports.
2. Minus sign: Click to delete the selected group of read global variables and corresponding output ports.
3. Clear: Click to clear all read global variables and corresponding output ports.
4. Block Add: Cooperate with the global variable block selection drop-down box to add all data in the block at once.

## Output Description
![](/media/202601/b93f5936-9656-4e8c-96d1-4547152999f5_1769063943.png)
1. Run Result: Whether the global variable was invalidated successfully.
2. Realized global variable:

## Precautions
1. Global variable invalidation and global variable clearing are fundamentally different.

---

Click here to jump to the corresponding Chinese manual page: [Global Variable Invalidation](/doc/221)