# checkLicense

## `checkLicense` (FB)

FUNCTION\_BLOCK checkLicense

### Short description

> Check for a valid license

### Representation

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### Interfaces

#### Inputs

#### Outputs

| Name             | Data type | Value range | Initial value | Function                                                                      |
| ---------------- | --------- | ----------- | ------------- | ----------------------------------------------------------------------------- |
| *xLicenseActive* | BOOL      |             |               | Indicator - Result - License check (FALSE = no license, TRUE = valid license) |

#### Setpoints / parameters

### Function description

#### General

This function block is used to check whether a valid license for the library(ies) is present.

| Condition                                          | *xLicenseActive* | Notes                                              |
| -------------------------------------------------- | ---------------- | -------------------------------------------------- |
| Valid license present                              | TRUE             | Valid license present                              |
| Demo mode active                                   | TRUE             | Demo mode active                                   |
| Valid license not present AND demo mode not active | FALSE            | Valid license not present AND demo mode not active |

### CODESYS

InOut:

| Scope  | Name             | Type   |
| ------ | ---------------- | ------ |
| Output | `xLicenseActive` | `BOOL` |