The DeviceNet protocol specifies that the device manufacturer provide a text file for every device. This file, called an Electronic Data Sheet (EDS), contains all the parameter information for a device: number of parameters, parameter groupings, parameter name, minimum, maximum, and default values, units, data format, and scaling. The EDS file may also specify the default I/O polling sizes. When the EDS file is imported into the DeltaV Library, it creates a new DeviceNet revision. When the revision is added to the port, it creates a new DeviceNet device.