UDP EIE

Devices > Communication Devices > UDP EIE

UDP EIE

The UDP EIE enables use of the User Datagram Protocol (UDP) for communication with CygNet remote devices. The UDP EIE communication device provides an interface to multiple RTUs primarily based on IP address and port. Because UDP doesn't have the same restrictions as TCP/IP, the UDP EIE enables faster messaging and less strain on a network. However, UDP can present complications when multiple field devices are talking through the same port at the same time since UDP cannot dictate message priority in such cases. Implementation of a Cryout Listen EIE is one way to avoid such complication.

Click the following image to see an example Device Editor:

For information about overriding communication device settings from the remote device, see Overriding Communication Settings.

A 64-bit version of this EIE is available. See 64-bit Device Drivers.

Configuring a UDP Communication Device

Assuming that a UDP communication device is the optimal communication device for your system, its configuration is relatively simple.

To Configure a UDP Communication Device

Open your DDS, click Comm Devices, and right-click in the white space of its service pane.
Click New Comm Device and add a Comm. Device - UDP.
Make settings on the UDP Device Editor dialog box to suit your needs.
Save your UDP Device Editor settings.
Click Remote Devices in your DDS, navigate to the remote device you want to assign your new UDP communication device to, and open the remote device.
Locate the Comm ID field and click the Browse button.
On the Select Communications Device dialog box, select the UDP communication device you want this remote device to use.
If you want to make advanced UDP settings, click Settings beside the Comm ID field and override UDP Destination Settings to establish connection with a new specific destination IP Address and Port.

Properties

The following tables list and describe properties from the UDP Device Editor dialog box.

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. Valid characters are A-Z, 0-9, dash (-), underscore (_), and tilde (~). No spaces are allowed. 20 character maximum. Note: Tilde (~) is a valid character for both devices and facilities, but its use is not recommended.
Host mode	Master: This default mode allows any message to be sent. NonMaster: This mode is remote device EIE-specific. It is not designed to allow write messages to be sent to an RTU. However, because each remote device EIE specifies what a write message is, you might still be able to send some write messages.
Description	A free-form description of the device. 32 character maximum.
Buffer size	The size (4K, 8K, 16K, or 32K) of your temporary message storage. 4K is ample to handle standard messages. However, 32K is recommended for Totalflow devices.
Message delay (msec)	The delay (in milliseconds) to wait before sending a message to the remote device. If the remote device also has a message delay, the greater value takes precedence.
Local address settings
IP address	The address of the local (host) communication device. Required for correct addressing.
Port	The port number of the local (host) communication device. Required for correct addressing.
Default destination settings
IP address	The address of a field communication device. Not required for correct addressing.
Port	The port number for a field device on a field communication device. Not required for correct addressing.
Enable Device	Check to enable or disable the device. The default setting is disabled. The device will automatically disable if an invalid configuration is detected. The device can be re-enabled after the invalid configuration is fixed.