FieldServer FS-8700-101 Manuale Utente

 
 

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In this example a Map Descriptor is defined which controls the task of reading pressure data from the Setra Model 370 Digital 
Pressure Gage.  The task gets performed every 5.0 seconds.  When a response is received the data is stored in the Data Array 
called DA_PRESSURE stating at element zero (the offset).  Each pressure reading requires the driver store 5 parameters and hence 
the length of the Map Descriptor is 5.  Refer to Appendix A for further information. 
 

Map_Descriptor_Name, 

Data_Array_Name,  Data_Array_Offset,  Function,  Node_Name,  Gage_Function,  Length,  Scan_Interval 

Read_Press, 

DA_PRESSURE, 

0, 

RDBC, 

Gage1, 

Pressure, 

5, 

5.0s 

 
 

 

Reserves 5 
elements of the 
Data Array to 
store response 
data. 

Unique names 
assist config file 
validation 
debugging but 
are not 
necessary. 

The name of a 
Data Array in 
which the 
response data 
will be stored

. 

The 1

st

 location 

in the Data 
Array which will 
be used for 
storage. 

The name of a Node 
defined in the CSV file. 
The node name connect 
the MD to a node which 
in turn points to a 
connection Thus the 
driver knows what port 
and port settings to use 
to send the poll.. 

Tells the driver 
to read the 
current 
pressure 
measurement 
from the Gage 

Tells the driver 
to schedule this 
MD no more 
often than 5 
seconds.