Overview

This topic describes how to access the HART field instrument and its data.

Preliminary Tasks

Before you can access the HART field instrument and its data, you first need to complete the following preliminary tasks:

Using an Animation Table to Connect to the HART Device

If the following output variables are selected in the Process Data page of the HART gateway module DTM, you may need to use an animation table to manually edit their settings:

  • G_Enable_ID: if the channel for a HART field instrument is not enabled, you need to enable that channel.

  • G_ResetChanged_ID : if the HART field instrument detected on the HART channel is different from the instrument previously specified for that channel, you need to accept the instrument actually detected on the channel.

To manually enable a channel for a HART field instrument, and accept the instrument detected on that channel, follow these steps:

Step

Action

1

In the Project Browser, navigate to Project > Animation Tables and click the right mouse button.

2

Select New Animation Table. A dialog of the same name opens.

3

In the New Animation Table dialog, accept the default Name or type in a new name, then click OK . The new animation table opens.

4

In the new animation table, double-click in the first cell of the first row. An ellipsis (...) appears.

5

Click on the ellipsis to open an Instance Selection dialog.

6

In the Instance Selection dialog, select the instance of the HART gateway module (for example a BMEAHI0812(H) module) and click OK . The selected object appears in the first row of the animation table.

7

In the animation table, expand the nodes for the module and outputs.

NOTE: If CH-Enable and CH-ResetChanged are selected in the Process Data page, the G_Enable_ID and G_ResetChanged_ID objects are displayed.

8

Check the HART gateway module Analog and HART channel LEDs for the HART field instrument.

9

To enable every HART gateway module channel, for the object G_Enable_ID :

  • click Modification in the animation table

  • type 255 in the Value field

  • click Enter

The channels for the HART gateway module are enabled.

10

Again, check the HART gateway module Analog and HART channel LEDs for the HART field instrument. If the HART channel LED for the field instrument is flickering red, that field instrument is not recognized by the HART gateway module.

11

If you need to accept the field instruments detected by the HART gateway module on every channel, for the object G_ResetChanged_ID :

  • click Modification in the animation table

  • type 255 in the Value field

  • click Enter

The field instruments detected by the HART gateway module are accepted.

Accessing HART Field Instrument Data

Follow these steps to connect to a field instrument and access its data. This procedure uses the example of the KIROHNE TT51 HART field instrument.

Step

Action

1

In the DTM Browser, navigate to and right click on the HART field instrument, which is located beneath a HART gateway module. A context menu opens.

2

Select Connect to establish a connection between Control Expert and the field instrument.

NOTE: When a connection is established, the HART field instrument is displayed in bold text.

3

If necessary, select PLC > Disconnect to disconnect Control Expert from the PLC.

4

In the DTM Browser, right click on the HART field instrument. A context menu opens.

5

Select Load data from device to load data from the HART field instrument into Control Expert.

6

In the DTM Browser, right click on the HART field instrument. A context menu opens.

7

Select Device menu > Observe (in this example) to load data from the HART field instrument into Control Expert.

8

Select the HART field instrument in the DTM Browser, then right click and select Open in the context menu. Basic HART data for the selected HART field instrument is now available from the DTM user interface.