Configuring Channel Properties

Use the Parameter Configuration dialog to configure the HART channels. In this dialog, you can:

  • enable or disable each of the HART channels

  • for each enabled channel specify:

    • the minimum number of preambles the module uses to communicate with a HART instrument

    • the value assigned to the primary variable if communication between the module and the HART instrument is disrupted

Create the module configuration settings offline, and then download them – along with the rest of the project configuration settings.

Configuring Parameters

You can configure the following parameters for the HART analog I/O module:

Parameter Name

Description

CH-Enable

The state of the HART channels. The CH-Enable value equals the sum of the binary values of every channel that is enabled.

NOTE: The CH-Enable parameters can be enabled or disabled in this dialog only if CH-Enable is de-selected in the Process Data dialog.

  • Channel 0...(N-1)

Sets the status of the selected channel to one of the following settings:

  • 0 = disabled

  • 1 = enabled (default)

Channel 0...(N-1) Settings

  • Number of Preambles

The minimum number of preambles the HART module uses to communicate with a HART instrument. If the HART instrument requires:

  • more preambles, the HART interface module sends more preambles

  • fewer preambles, the HART interface module sends the minimum number configured by this setting

Default = 5.

  • Fallback Mode Setting

If the HART instrument on this channel is disconnected, or if there is no HART instrument, this setting determines the value that is assigned to the primary variable ( PV):

  • Set to 0

  • Hold Last Value

  • Not a Number (NaN)

Default = NaN

Restore Default Values

You can click the Restore to Defaults button to reset the modified values in this dialog to their default values.

Downloading Configuration Settings

To download an edited parameter configuration, follow these steps:

Step

Action

1

In the DTM Browser, right click on the HART gateway DTM.

2

In the context menu, select Additional Functions > Transfer to FDR Server.

3

When the transfer is complete, the message “Transfer to FDR Server is Successful” displays. Click OK.