User Guide

FS-8700-86 Carrier DataPort Page 14 of 32
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5.4.4. Map Descriptor Example.
This example shows a number of server Map Descriptors used to define a table called ‘DISPLAY’. If a Client sends a read table request the driver responds by sending all the appropriate data for every Map Descriptor with the same table name (provided that the node’s match too. ). The fields are returned in the order in which you define them in the configuration file. // Server Side Map Descriptors Map Descriptors Map_Descriptor_Name, Function, Node_Name, Table_Name, Field_Name, Field_Description, Field_Units, On_String, Off_String, Data_Array_Name, Data_Array_Offset,
Length,
Display_MD01, passive, Node_1, DISPLAY, MODE , Desired Mode , , ON , OFF , TABLE_DISPLAY, 01 , 1, Display_MD02 , passive, Node_1, DISPLAY, ALARM , Equipment Status, , ALARM , NORMAL, TABLE_DISPLAY, 02 , 1, Display_MD03 , passive, Node_1, DISPLAY, CSPT , Controlling Setp., dF , NUMERIC , -, TABLE_DISPLAY, 03 , 1, Display_MD04 , passive, Node_1, DISPLAY, SPT , Controlling Temp, dF , NUMERIC, -, TABLE_DISPLAY, 04, 1, Display_MD05 , passive, Node_1, DISPLAY, RAT , Space Temp, dF , NUMERIC , -, TABLE_DISPLAY, 05, 1, Display_MD06 , passive, Node_1, DISPLAY, SAT , Supply Air Temp., dF , NUMERIC, -, TABLE_DISPLAY, 06, 1, Display_MD07 , passive, Node_1, DISPLAY, FANSTAT, Fan Mode, , ON, OFF , TABLE_DISPLAY, 07, 1, Display_MD08 , passive, Node_1, DISPLAY, CCAP , Cooling Capacity, % , NUMERIC, - , TABLE_DISPLAY, 08, 1, Display_MD09 , passive, Node_1, DISPLAY, HCAP , Heating Capacity, % , NUMERIC, - , TABLE_DISPLAY, 09, 1, Display_MD10 , passive, Node_1, DISPLAY, FLTSTAT, Filter Status, , DIRTY, CLEAN , TABLE_DISPLAY, 10, 1,
All the Server Map
Descriptors are passive.
If the value of the array named TABLE_DISPLAY, offset 10 is a 1 then the FieldServer will report he FLTSTAT variable as DIRTY. If it is zero then the variable’s state will be reported as clean.
By using the NUMERIC keyword, the driver is told to report the value of the variable HCAP as a number. Thus the driver sends the value of the array named TABLE_DISPLAY offset 9 to the Client.