FieldServer FS-8700-78 Advanced Map Descriptor Example 4 - Using the DAAssoc parameter

Driver Manual

6.1.7Advanced Map Descriptor: Example 4 - Using the 'DA_Assoc' parameter.

Map_Descriptor_Name, Data_Array_Name, Data_Array_Offset, Function, node_name, Address, Length, DA_Func, DA_Field, DA_Assoc, Scan_Interval

A1,	DA_AI3,
A2,	DA_AI3,
A3,	DA_AI3,
A4,	DA_AI3,
A8,	DA_AI4,
A9,	DA_AI4,

A 'Read' and some passive map descriptors to extract other data fields from the same read. (optimizes communications)

Read must precede the passive's.

0,	rdbc,	Node_A,	0,	1 , dap80-menu, All		,	1	,5
1,	passive,	Node_A,	0,	1	, dap80-menu, alrm_delay_1,		1	,5
2,	passive,	Node_A,	0,	1, dap80-menu, alrm_delay_2,			1	,5
3,	passive,	Node_A,	0,	1	, dap80-menu, alrm_delay_3,		1	,5
0,	wrbc,	Node_A,	0,	1 , dap80-menu, nom_h_setpt,			2	,5
1,	passive,	Node_A,	0,	1	, dap80-menu, t_setpt ,		2,	5

		DA_Assoc associates
		the passives with the
		correct active map
		descriptor.
A 'Write' and a	Potential	Thus Map Descriptors
passive to the	confusion for	A2,3,4 are associated
same node. This	the FieldServer	with A1 because the
write will update	because the	value of DA_Assoc=1
two fields, the	node and the	for all these map
nom_h_setpt	DA_Func's are	descriptors.
and the t_setpt.	the same for all
	the map	Thus Map
The write map	descriptors.	DescriptorsA89is
desc. Must		associated with A8
precede the	Solve this	because the value of
passive.	problem using	DA_Assoc=2 for both
	DA_Assoc.	these map descriptors.

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