Editor – Device Page

Use the Device page to view, select, and modify general device settings for a remote device. These settings are the minimum required for remote device functionality. The Device page of a remote device editor typically contains settings unique to its field device type(s) or to the EIE itself.

OPC EIE - Device Page

Click the thumbnail to see an example
OPC EIE - Device Page

For more information, see Remote Device Editors.

Device Properties

The following table lists and describes specialized Device page properties for this device. See Device Page for common properties.

Property Description

Device ID

The unique identifier of an instance for this device. This free-form name must be unique in the DDS and the FAC. That is, it must be a name not used by any other communication device, import/export device, remote device, or facility.

CygNet naming standards for device ID are as follows:

Component Valid Character Set Limits

Device ID

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z (uppercase)

0 1 2 3 4 5 6 7 8 9

dash (-), underscore (_), and tilde (~).

Note: Tilde (~) is a valid character for both devices and facilities, but its use is not recommended.

20 character maximum

No spaces

Description

Displays a user-defined description of the remote device. A free-form description of the device. 32 character maximum.

Sentinel Value

See the following topics with more information about configuring point processing for unreliable data:

Use sentinel value

To accommodate OPC servers that send sentinel values to indicate data quality, select this check box to use the sentinel value for this device. If checked it will apply to all data groups on this device.

Sentinel value

Specify the sentinel value to be used or if the "defaultSentinelValue" is specified in the DTF for the device, that value will be displayed.

Access path

The CygNet "Access path" must match the access path for this device as defined in the OPC server.

Note: This value is also a component of the path used to access an OPC tag. By default, the separator character used between this value and the "itemId" value (set on the DEID in the device template file) for the path is "." (period). To set an alternative or custom value for this separator, use the accessPathSeparator attribute when defining the DataGroup element in the DTF.

OPC Group Definition

See OPC Group Management for more information about OPC groups.

Enable asynchronous callbacks

When Enable asynchronous callbacks is selected, the OPC server will perform asynchronous callbacks and push data to the OPC EIE as it retrieves changed values from the remote device.

Update rate (ms)

The value selected for the Update rate (ms) for asynchronous callbacks determines the following behavior:

  • If asynchronous callbacks are enabled, the Update rate indicates the maximum rate at which the callback should occur, i.e., the OPC server should initiate a callback no more frequently than the update rate.
  • If asynchronous callbacks are not enabled, the Update rate indicates the minimum rate that the OPC server cache should be updated, i.e., the OPC server should request data from the remote device at least this frequently.

The default value is 60000 milliseconds.

Deadband %

The Deadband % is an OPC standard capability that requests that an OPC server only report value changes that exceed a configured percentage. Type a percentage value for the OPC Group Definition. The default value is 0.
Communications

Comm ID

The name of the communication device this remote device uses. Click the Options button to select from the choices in the drop-down menu. See Communication Devices.

Options

This button provides several communications-oriented options.

Options are as follows:

  • Browse: Enables you to browse to the Select Communications Device dialog box where you can choose a different communication device.
  • Override settings: Not available for OPC remote devices.
  • Properties: Enables you to browse to the applicable communication-device properties dialog box.

Note: When selecting a communication device, the only options available in the Select Communications Device dialog box are OPC Comm devices.

Async timeout (ms)

Async timeout (ms) displays the time in milliseconds a remote device waits for a valid response from an associated field device before timing out.

This setting is not the same as similar settings on the currently active communication device and device failover settings. But these settings work in conjunction with one another.

Advanced

Click to access advanced communication device failover settings.

Enable device

Select whether to enable or disable the device. The default setting is disabled. If an invalid configuration is detected, the device will automatically be disabled. The device can be re-enabled after the invalid configuration is fixed.
Device security

Application

Defines the ACS security application name used to validate the users of this device. See Applications, Events, Permissions.

Event

Defines the ACS security event used to validate users of this device. Click … to select the security event. See Applications, Events, Permissions.

Comm Data

Enables you to open a modeless Communications Data Viewer dialog box.

Audit History

Enables you to view the audit trail for the device.

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