# CODESYS V3

The EMQX Neuron CODESYS V3 TCP driver enables access to PLCs and motion control systems based on the CODESYS V3 platform through the TCP protocol.

For the generic steps, see [Create a Southbound Driver](../south-devices.md) and [Groups and Tags](../../groups-tags/groups-tags.md).
## Device Settings
| Field    | Description                                     |
| -------- | ----------------------------------------------- |
| host     | Device IP address                               |
| port     | Device port, default is 11740                   |
| timeout  | Request send/receive timeout, default is 3000ms |
| username | Device username                                 |
| password | Device password                                 |

If the device logs in anonymously, fill in "Anonymous" as the username and leave the password blank.

## Supported Data Types
- uint8
- int8
- uint16
- int16
- uint32
- int32
- float
- bool
- string
Type Mapping Table

| CODESYS V3 | EMQX Neuron |
| ---------- | ------ |
| Bool       | bool   |
| Byte       | uint8  |
| SInt       | int8   |
| USInt      | uint8  |
| Word       | uint16 |
| Int        | int16  |
| UInt       | uint16 |
| DWord      | uint32 |
| DInt       | int32  |
| Real       | float  |
| UDInt      | uint32 |
| String     | string |

## ADDRESS
> TAG NAME

The symbol configuration exported by the CODESYS V3 platform is the address of the Nueron location.

## Address Examples
| Address                            | Data Type | Description                                                 |
| ---------------------------------- | --------- | ----------------------------------------------------------- |
| Application.PLC_PRG.ok             | bool      | Boolean flag                                                |
| Application.PLC_PRG.d1arr[1]       | int16     | Value of index 1 in a 1D array                              |
| Application.PLC_PRG.d2arr[1,1]     | int32     | Value of index 1,1 in a 2D array                            |
| Application.PLC_PRG.d3arr[1,1,1]   | int16     | Value of index 1,1,1 in a 3D array                          |
| Application.PLC_PRG.point.Y        | float     | Y variable value of the Point structure                     |
| Application.PLC_PRG.points[1].Name | string    | Name variable value of the Point structure array at index 1 |