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Page 23
6 Advanced Topics
6.1 Additional Driver Specific Map Descriptor Parameters
What happens if you want to poll for one specific type of data more frequently than others ? What if you
want more control of the location of where data is stored ? What happens if you want to do diagnostic
polls … ?
To be able to achieve solutions to any of these types of questions the driver offers advanced configuration
by adding to and extending the map descriptors specific to the Dart Serial Driver.
Column Title Function Legal Values
DA_Func* Specifies the Data Aire
Command/Query function to be
used. Use a function
appropriate to the type of slave
(DAP/Chiller/DAP80) and the
type of data required.
Numeric/Text.
See section 6.1.1 for a list of
possible values.
DA_Field* Specifies the data field to be
retrieved from the slave device.
Salves are only capable of
responding with a data
composite consisting of many
data fields. You use this
parameter to specify which
parameter is you wish to have
extracted from the data
composite.
Note
1
.
This is a text field.
See section 6.1.2 for a list of
possible values as well as Table
4.4.5.1
DA_Assoc* Use to associate passive map
descriptors with an active map
descriptor. In some case you
may have a read (rdbc)
addressing the same node as a
write (wrbc). Both the read and
write may have associated map
descriptors. This field is used to
make the association. Give the
rdbc & passives map
descriptors associated with the
rdbc the same value (any
number) and give the wrbc and
its passive map descriptors
Any positive integer.