FieldServer FS-8704-12 Configuring the FieldServer as a GE-EGD Client, Data Arrays, Section Title

FS-8704-12_GE-EGD Manual Page 6 of 26

4.Configuring the FieldServer as a GE-EGD Client

Historically, one uses the client-server model to describe the operation of most protocols. Recently producer-consumer model protocols have started to become more numerous. The GE-EGD (Ethernet Global Data) is a producer-consumer model protocol. In equating the two models it is important to regard the consumer as a passive (FieldServer) client. Other clients typically are active and poll for new data. The consumer is a passive client in that waits to digest new data generated by a producer.

For a detailed discussion on FieldServer configuration, please refer to the instruction manual for the FieldServer. The information that follows describes how to expand upon the factory defaults provided in the configuration files included with the FieldServer (See “.csv” files provided with the FieldServer).

This section documents and describes the parameters necessary for configuring the FieldServer to communicate with a GE-EGD Producer.

The configuration file tells the FieldServer about its interfaces, and the routing of data required. In order to enable the FieldServer for GE-EGD communications, the driver independent FieldServer buffers need to be declared in the “Data Arrays” section, the destination device addresses need to be declared in the “Client Side Nodes” section, and the data required from the servers needs to be mapped in the “Client Side Map Descriptors” section. Details on how to do this can be found below.

Note that in the tables, * indicates an optional parameter, with the bold legal value being the default.

4.1.Data Arrays

Section Title
Data_Arrays
Column Title	Function	Legal Values
Data_Array_Name	Provide name for Data Array	Up to 15	alphanumeric
		characters
		FLOAT,	BIT, UInt16,
Data_Format	Provide data format. Each Data Array	SInt16, Packed_Bit, Byte,
	can only take on one format.	Packed_Byte,
		Swapped_Byte
	Number of Data Objects. Must be
Data_Array_Length	larger than the data storage area	1-10,000
	required for the data being placed in
	this array.

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