FieldServer FS-8700-101 - Manual (Page 16)

FS-8700-101_Setra Model 370 Digital Pressure Gage Manual Page 16 of 23
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5.3.3. Server Map Descriptor Example.
This Map Descriptor defines a capability of the FieldServer to respond to a poll for an immediate Pressure Print (Command Code =
‘P’). When the poll is received, the driver inspects 5 consecutive array elements starting at offset 0 in the Data Array named
DA_PRESSURE. The contents of the 5 elements are defined in Appendix A.1.1. The 2
nd element is the units index, the 3 rd is the
pressure indicating letter. Both of these elements must be set to non-zero values.
Map_Descriptor_Name, Data_Array_Name, Data_Array_Offset, Function, Node_name Gage_Functon Length
SRV_Pressure, DA_PRESSURE 0, Server Gage1 Pressure, 5
Data for the
response to a
‘P’ poll is
extracted from
this Data Array.
This function defines
a capability of the
FieldServer to
respond to an
incoming poll.
The Map Descriptor
is passive. It does
not generate
messages but is
used to respond. The Node Name
must be the same
as one of the
nodes defined in
the ‘nodes’ section
of the CSV file. Defines the capability
of this Map Descriptor.
This Map Descriptor
can only be used to
form responses to a
‘P’ poll.