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FS -8700-59 Canatal Sachnet Driver Manual
FieldServer Technologies 1991 Tarob Court Milpitas, California 95035 (408) 262-2299 fax: (408) 262-9042
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Page 11
5.4.4 Map Descriptor Example
In this example the FieldServer answers queries from a Canatal Satchnet master device. A same map descriptor could be used when the same master wants to
write data to the FieldServer. In this example the FieldServer is emulating a Canatal device addressed as node 11. It is not possible to have the FieldServer
emulate two devices of difefrent series addressed as node 11.
Map_Descriptor_Name, Data_Array_Name, Data_Array_Offset, Function, node_name, Address, Length, Cana_Series, Cana_Table
DEV11_TBL5 , DA_AI3, 0 , passive, Node_12, 0, 3 , 4 , 5
Server side map
descriptors are
passive. They
respond to read /
write comman
ds
from a Canatal
master.
The node name
connects this map
descriptor to a node
specification.
Corresponds to the offset into the data table being requested.
If the request is for offset 2 (3rd element of the table), then the
FieldServer responds with data from array DA_AI3 element
10(offset into array)+3(3rd element).
If the request was for offset 5 then this map descriptor would
not be cabaple of processing the response. (starts at 0 and is 3
elements long.)
Read section 6.1 for
more information.
The FieldServer
needs to know
which Canatal
device series
number to emulate.
This is the number
of the Canatal
device's data table
you wish the
FieldServer to
emulate.