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FS-8700-105_National_Time_and_Signal_FACP Manual Page 12 of 25
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Appendix A. Advanced Topics
Appendix A.1. Modifying the Trouble String Table
The trouble string table can be modified/extended using the configuration file.
In the example below, the keyword ‘Broken’ is added and allocated an index value of 1 and a
trouble type of 1. When this message is received it will not be used to clear the Data Arrays
The following are permitted Trouble_Types
1 – Alarms
2 – Troubles
3 – Supervisories
4 – Others
Use the same system to modify existing entries in the table. If the Trouble string exists then
the driver updates the other values. If the string doesn’t exist then a new entry is added. The
table has space for 100 strings.
Driver_Table
Trouble_String, Index_Value, Trouble_Type, Is_Reset, Protocol
Broken, 1, 1, No, National_Time_Fire
Fixed, 0, 1, No, National_Time_Fire
DigiFail, 99, 2, No, National_Time_Fire
Appendix A.2. Controlling which arrays get cleared when a Reset is received.
When a reset message is received on a port then all Data Arrays being used by the Map
Descriptors on that port will have their values set to zero. Specifically: each Map Descriptor
is associated with a section of a Data Array based on the ‘Data Array Offset’ parameter and
the ‘Length’ parameter specified on the Map Descriptor. It is these sections that get reset
when a reset message is received. It is possible to modify this behavior by poking the value
1 into offset 5 in the stats Data Array. You can do this on a temporary basis using the Ruinet
utility or on a permanent basis by including the following in your configuration. Only the
Data Arrays associated with Map Descriptors with panel numbers matching the panel number
of the incoming message are reset.
3
Data_Arrays
Data_Array_Name, Data_Format, Data_Array_length
natsfacp-stats, natsfacp-stats, 1000
3
If you cut and past the above text into your configuration file ensure that you do not duplicate the line which says
“natsfacp-stats, natsfacp-stats, 1000,” Duplication will cause an error.