[@wago/wdx-schema](../README.md) / [Exports](../modules.md) / [WDX](../modules/WDX.md) / [Schema](../modules/WDX.Schema.md) / [Model](../modules/WDX.Schema.Model.md) / [Data](../modules/WDX.Schema.Model.Data.md) / [MetaData](../modules/WDX.Schema.Model.Data.MetaData.md) / MetadataMODBUSEntity

# Enumeration: MetadataMODBUSEntity

[Data](../modules/WDX.Schema.Model.Data.md).[MetaData](../modules/WDX.Schema.Model.Data.MetaData.md).MetadataMODBUSEntity

## Table of contents

### Enumeration Members

- [Coil](WDX.Schema.Model.Data.MetaData.MetadataMODBUSEntity.md#coil)
- [Device](WDX.Schema.Model.Data.MetaData.MetadataMODBUSEntity.md#device)
- [DiscreteInput](WDX.Schema.Model.Data.MetaData.MetadataMODBUSEntity.md#discreteinput)
- [HoldingRegister](WDX.Schema.Model.Data.MetaData.MetadataMODBUSEntity.md#holdingregister)
- [InputRegister](WDX.Schema.Model.Data.MetaData.MetadataMODBUSEntity.md#inputregister)

## Enumeration Members

### Coil

• **Coil** = ``"Coil"``

**Coil (0xxxx)**

- Data Type: Single bit
- Address Range: 00001–09999
- Access: **Read/Write**
- Typical Use: Digital outputs (on/off), relay states, discrete control values.
- Related FCs: FC1 (Read Coils), FC5 (Write Single Coil), FC15 (Write Multiple Coils).

#### Defined in

src/WDX/Schema/Model/Data/MetaData/MetadataMODBUSEntity.ts:22

___

### Device

• **Device** = ``"Device"``

**Device (Identification via FC43/14)**

- Data Type: Structured identification objects
- Address Range: *Not bound to coil/register ranges*  
- Access: **Read-Only**
- Typical Use: Provides information about the Modbus device itself
  (e.g., Vendor Name, Product Code, Revision, Serial Number).
- Related FCs: FC43/14 (Read Device Identification).

Unlike coils or registers, the **Device entity** is not tied to a
memory address range but represents metadata about the device.

#### Defined in

src/WDX/Schema/Model/Data/MetaData/MetadataMODBUSEntity.ts:71

___

### DiscreteInput

• **DiscreteInput** = ``"DiscreteInput"``

**Discrete Input (1xxxx)**

- Data Type: Single bit
- Address Range: 10001–19999
- Access: **Read-Only**
- Typical Use: Digital inputs such as sensor contacts, push buttons, limit switches.
- Related FCs: FC2 (Read Discrete Inputs).

#### Defined in

src/WDX/Schema/Model/Data/MetaData/MetadataMODBUSEntity.ts:33

___

### HoldingRegister

• **HoldingRegister** = ``"HoldingRegister"``

**Holding Register (4xxxx)**

- Data Type: 16-bit word
- Address Range: 40001–49999
- Access: **Read/Write**
- Typical Use: Analog outputs, configuration parameters, counters.
- Related FCs: FC3 (Read Holding Registers), FC6 (Write Single Register),
  FC16 (Write Multiple Registers), FC22 (Mask Write Register).

#### Defined in

src/WDX/Schema/Model/Data/MetaData/MetadataMODBUSEntity.ts:45

___

### InputRegister

• **InputRegister** = ``"InputRegister"``

**Input Register (3xxxx)**

- Data Type: 16-bit word
- Address Range: 30001–39999
- Access: **Read-Only**
- Typical Use: Analog input values such as temperature, pressure, or flow sensors.
- Related FCs: FC4 (Read Input Registers).

#### Defined in

src/WDX/Schema/Model/Data/MetaData/MetadataMODBUSEntity.ts:56