FieldServer FS-8704-49 Driver Related Map Descriptor Parameters, Timing Parameters

FS-8700-49_Data_Aire_DAP Page 10 of 48

4.4.2.Driver Related Map Descriptor Parameters

Column Title	Function	Legal Values
	Name of Node to fetch data	One of the node names
Node_Name		specified in “Client Node
	from
		Descriptor” above
Data_Type	Data type	Register, Coil, AI, DI
Length	Length of Map Descriptor	1
		Not required for client
Address	Starting address of read block	configuration - used in
		simulation configuration only.
	Only required when the function
	is a Read (rdbc).
	Tells the driver to poll the
DA_Func*	device for all the data that is	Everything – See Appendix A
	available. The data is device
	specific.
	Other uses of this parameter
	are discussed in Appendix B .
	Required when the function is a
	write (wrbc) or when the Map
	Descriptor is associated with a
	write by means of the
DA_Field	DA_Assoc parameter value.	See Appendix A.2 for a list of
	This is the name of the data	permitted values.
	field whose value you wish to
	set in the device.
	Other uses of this parameter
	are discussed in Appendix B.
	Use to associate passive Map
	Descriptors with an active Map
	Descriptor. Multiple fields can	Any positive integer. See
DA_Assoc	be associated with one WRBC
		Appendix E
	Map Descriptor, thus writing
	multiple values to one device
	using just one message.

4.4.3.Timing Parameters

Column Title	Function	Legal Values
Scan_Interval	Rate at which data is polled	≥0.1s

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