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FS-8700-49_Data_Aire_DAP Page 10 of 48
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4.4.2. Driver Related Map Descriptor Parameters
Column Title Function Legal Values
Node_Name
Name of Node to fetch data
from
One of the node names
specified in “Client Node
Descriptor” above
Data_Type Data type Register, Coil, AI, DI
Length Length of Map Descriptor 1
Address Starting address of read block
Not required for client
configuration - used in
simulation configuration only.
DA_Func*
Only required when the function
is a Read (rdbc).
Tells the driver to poll the
device for all the data that is
available. The data is device
specific.
Other uses of this parameter
are discussed in Appendix B .
Everything – See Appendix A
DA_Field
Required when the function is a
write (wrbc) or when the Map
Descriptor is associated with a
write by means of the
DA_Assoc parameter value.
This is the name of the data
field whose value you wish to
set in the device.
Other uses of this parameter
are discussed in Appendix B.
See Appendix A.2 for a list of
permitted values.
DA_Assoc
Use to associate passive Map
Descriptors with an active Map
Descriptor. Multiple fields can
be associated with one WRBC
Map Descriptor, thus writing
multiple values to one device
using just one message.
Any positive integer. See
Appendix E
4.4.3. Timing Parameters
Column Title Function Legal Values
Scan_Interval Rate at which data is polled ≥0.1s