FieldServer Dart FS-8700-78 User Manual
Page 33
Driver Manual
FieldServer Technologies 1991 Tarob Court Milpitas, California 95035 (408) 262-6611 fax: (408) 262-9042
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Page 31
6.1.7
Advanced 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,
0, rdbc, Node_A, 0, 1 , dap80-menu,
All
,
1
,5
A2,
DA_AI3, 1, passive, Node_A, 0, 1 , dap80-menu, alrm_delay_1,
1
,5
A3,
DA_AI3, 2, passive, Node_A, 0, 1, dap80-menu, alrm_delay_2,
1
,5
A4,
DA_AI3, 3, passive, Node_A, 0, 1 , dap80-menu, alrm_delay_3,
1
,5
A8,
DA_AI4, 0, wrbc, Node_A, 0, 1 , dap80-menu, nom_h_setpt,
2
,5
A9,
DA_AI4, 1, passive, Node_A, 0, 1 , dap80-menu, t_setpt ,
2,
5
A 'Read' and some
passive map
descriptors to
extract other data
fields from the
same read.
(optimizes
communications)
Read must precede
the passive's.
A 'Write' and a
passive to the
same node. This
write will update
two fields, the
nom_h_setpt
and the t_setpt.
The write map
desc. Must
precede the
passive.
DA_Assoc associates
the passives with the
correct active map
descriptor.
Thus Map Descriptors
A2,3,4 are associated
with A1 because the
value of DA_Assoc=1
for all these map
descriptors.
Thus Map
DescriptorsA89is
associated with A8
because the value of
DA_Assoc=2 for both
these map descriptors.
Potential
confusion for
the FieldServer
because the
node and the
DA_Func's are
the same for all
the map
descriptors.
Solve this
problem using
DA_Assoc.