DOCA0110EN-06

Read Device Registers

Description

This page allows the Link150 gateway to read Modbus registers from the selected device.

Read Procedure

Step

Action

Result

1

On the Link150 menu bar, click Diagnostics.

Opens the Diagnostics menu.

2

From the Diagnostics menu, in the Communication submenu, click Read Device Registers.

Opens the Read Device Registers page.

3

Select the device from the Device Name list.

Selects the device from the list.

4

Enter Local ID (or choose from the defined device list), Starting Register, and then Number of Registers.

Enters the registers to read from the specified device.

NOTE: The Local ID parameter is disabled in slave mode.

5

Select the Data Type.

Selects the appropriate data type.

6

To change how Modbus data is displayed in the Value column, select Decimal, Hexadecimal, Binary, or ASCII.

Selects how the data values are displayed.

7

Click Read.

Reads the device register according to the selected configuration.

Link150 Read Device Register Parameters

Parameter

Description

Settings

Device Name

Selects a device to read from the list of previously added devices.

NOTE: When the device is in slave mode, the Read button is available even if a name is not selected from the Device Name list.

-

Local ID

The address (Local ID) of the device that is to be read.

NOTE: The Local ID parameter is disabled in slave mode.

1 (Factory setting)

Starting Register

Register number in decimal.

  • 0–65535

  • 1000 (Factory setting)

Number of Registers

The number of registers to read.

  • 1–125

  • 10 (Factory setting)

Register

Lists the register numbers in decimal.

-

Value

Lists the data stored for a register. Values retrieved depend on the device connected to the Link150 gateway. Refer to the documentation for the connected device for more information about stored register values.

-

Data Type

Lists the data types available for the device.

  • Holding Registers (Factory setting)

  • Input Registers

  • Input Coils

  • Output Coils

Decimal, Hexadecimal, Binary, ASCII options

Selects an option to specify how the Value column data is displayed.

Decimal (Factory setting)

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