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FS-8700-105_National_Time_and_Signal_FACP Manual Page 9 of 25
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4.1.4. Map Descriptor Example 1 – Port has no Sub-Ports.
This Map Descriptor is used to store messages from ‘Panel2’ if they meet the following criteria
Panel
Number
= Node ‘Panel2’‘s Node_ID
Board = 1
Loop = 2
Port-Type = Inputs
Port = 1 to 100 (Address and length
parameters)
Data_Type = Alarms
Typically you will create one MD for each of the 4 data types for each Panel/Board/Loop/Port-Type/Port combination. Only messages
which report trouble allocated to the ‘Alarm’ category will update the DA below. Appendix A.4 provides more information on which
messages are allocated to each data type.
If any of the Port’s has a sub-port then additional MD’s must be created because the Sub-Port_Type = None.
Map_Descriptor_Name, Data_Array_Name, Data_Array_Offset, Function, Node_Name Board Loop Data_Type Port_Type Address Length Sub-Port_Type
P2B3L4_ia, P2B3L4_iA , 0, Passive_Client , Panel2 , 1 2 Alarms Input 0, 100 None
Driver cannot poll.
Always use this
keyword.
Address is a synonym for
‘Port’. Use the length to
tell the driver the Port
range