FieldServer FS-8704-12 Appendix B.1. EGD-ii EGD Internal Indications, Array Contents Element

FS-8704-12_GE-EGD Manual Page 23 of 26

Appendix B.1. EGD-ii (EGD Internal Indications)

This driver can expose data from the most recently consumed message and some additional diagnostic information.

A special Map Descriptor is required. The driver recognizes the Map Descriptor by its name which must be "EGD-ii" which stands for EGD Internal Indications.

The following example shows how this special Map Descriptor can be configured.

Nodes
Node_name,	Protocol
null_node,	ge_egd
Data_Arrays
Data_Array_Name,	Data_Format,	Data_Array_Length
EGD_DIAG,	UINT32,	100
Map_Descriptors
Map_Descriptor_Name,	Data_Array_Name,	Node_name
egd-ii,	EGD_DIAG,	null_node

When the driver sees this Map Descriptor it uses the Data Array EGD_DIAG to store driver specific data. Only one of these Map Descriptors may be specified per FieldServer.

The driver stores the following data.

Array		Contents
Element
0-31		The first 32 bytes of the most recently received UDP packet received on
		port 0x4746 (The GE EGD port).
32	PDUTypeVersion
33	RequestID
34	ProducerID2
35		ExchangeID
36	TimeStampSec
37	TimeStampNanoSec
38	Status3
39	ConfigSignature
40	Reserved
41	Source IP Address1

2As a UINT32. Not in dot format

3Read section 4.4 of GE-Fanuc document GFK-1541 for more information.

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