Field Bus Discovery Service

Introduction

Use the field bus discovery service to detect, and add to your Control Expert application, network devices that are situated on a local channel. The field bus discovery service is available only when the Ethernet communication module DTM is connected to its physical device.

Only the first level devices below the communication DTM are detected.

Performing Field Bus Discovery

The results of the scanning process is compared to the registered DTMs in the DTM catalog of the computer. If a match is found in the DTM catalog for a scanned device, the results are accompanied with a matching type that gives the accuracy of the match.

The three available matching types are:

exact match:

All identification attributes are matching. The correct device type was found.
generic match:

At least the Vendor and device Type ID attributes match. The support level of DTM is Generic Support.
uncertain match:

At least the Vendor and device Type ID attributes match. The support level of DTM is not Generic Support.

The following procedure explains how to use the field bus discovery service:

Step	Action
1	In the DTM Browser, select an appropriate DTM.
2	Right click, and in the pop-up menu and select Field bus discovery. Result: The Field bus discovery dialog opens.
3	If necessary, select a channel and a protocol: if the DTM has more than one channel if the channel supports more than one protocol
4	Click OK. Result:The service starts to detect devices on the selected channel. NOTE: The field bus discovery service limits its search to only the range of IP addresses that is pre-configured for the selected channel in the Channel Properties page.
5	If at least one matched device has been found, the Field bus discovery dialog displays a list of Scanned Devices.
6	Use the controls of the Field bus discovery dialog to select the devices to add to your Control Expert application.
7	After you have selected all the devices you want to add in the Field bus discovery dialog, click OK.
8	If the field bus discovery process has found one or more devices with an IP address that is already in use in the project, you will be asked if you want to continue and replace the existing project device(s). Click Yes and proceed to step 9. — or — Click No to cancel automatic field bus discovery.
9	The device properties dialog opens, displaying the default name for the first discovered device to be added: In the General page of the device properties dialog, type in the Alias name for the device to be added, then click OK. Result: The dialog closes, then re-opens if there is another device to be added to the application.
10	Repeat step 9 for each additional discovered device.
11	After all devices have been added to the application, configure each device for operation as part of the application. To do this: Disconnect the Ethernet communication module from its DTM. In the DTM Browser, select the Ethernet communication module, then select Edit → Disconnect. Configure the new device properties in the DTMs for both the Ethernet communication module, and the newly added remote device.

Field Bus Discovery Dialog

If at least one matched device has been found, the Field bus discovery dialog box is displayed listing the scanned and matched devices. Select the matched devices to be created in the Control Expert project (which then shows up in the Selected Devices list:

This dialog presents 3 lists:

This list...	Displays...
Scanned Devices	All the devices (matched and unmatched) found during the scan.
Matched Devices	The matched DTMs found in the workstation DTM catalogue for the device that you selected in the Scanned Devices list. Each time a scanned device is selected in the Scanned Devices list, the contents of the Matched Devices list is updated to display the matched device DTMs found for the selected scanned device. The matching process can yield one or more matched devices for a given scanned device. In this case, only one DTM was discovered for the selected scanned device.
Selected Devices	This list displays the device DTMs that have been selected in the Matched Devices list, which will be added to the Control Expert project.

The lists use the following colored icons:

This color...	Indicates...
green	The device has been selected.
yellow	The device has been matched.
red	The device has not been matched.
black	Information about the address of the scanned device: In the Scanned Devices list, the device has an address identical to one of the DTMs in the Control Expert project. In the Matched Devices list, the device will be assigned an address identical to one of the DTMs in the Control Expert project.
NOTE: An icon can consist of 2 colors. For example, a search can discover a device that: has a matching DTM — and — has an IP address identical to a device already added to the Control Expert application In this case, the icon next to the discovered device would be: half yellow and half black, before it is selected — and — half green and half black, after it is selected

This dialog has 5 buttons:

Button	Use this button to...
Add All	Automatically add the best matched (according to the matching types listed above) device DTM for each found device in the Matched Devices list to the Selected Devices list.
Add One	Add the matched device DTM selected in the Matched Devices list.
Remove	Remove one or more devices from the Selected Devices list.
OK	Insert the device DTMs in the Selected Devices list into the Control Expert project. If there are one or more devices in the Selected Devices list that have the same address in the Control Expert project, a message box opens asking if you want to continue. If you click OK, all devices in the Control Expert project that have identical addresses as the selected devices are deleted and replaced by the DTMs selected in the Selected Devices list.
Cancel	Cancel the field bus discovery scan and do nothing. All information in the three lists is discarded.