Sierra Monitor Company FS-8700-48 - Manual (Page 20)

FS-8700-48 Fike Cheetah Manual Page 21 of 37
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5.4.14 Map Descriptor Example 9 – Full History Event Record – Specific Device
Full History Event records contain composite data which require at least 65 consecutive Data Array locations for storage. If the Data_Array_Offset is not
carefully specified the storage areas will overlap.
// Client Side Map Descriptors
Map_Descriptor_Name , Data_Array_Name , Data_Array_Offset , Function , Node_Name , Cheet_Zone , Cheet_DT , Cheet_Device , Cheet_Loop , DA_Byte_Name , Length
Device1_L1_Hist , DA_HIST , 20 , Passive , Node_A , None , History , 20 , 1 , DA_HIST_EVENT , 256
5.4.15 Map Descriptor Example 10 – Full History Event Record – Any Device
Only the most recent history event is stored using this Map Descriptor. The full record is stored but is overwritten when a new event is received irrespective of
the event’s device address.
// Client Side Map Descriptors
Map_Descriptor_Name , Data_Array_Name , Data_Array_Offset , Function , Node_Name , Cheet_Zone , Cheet_DT , Cheet_Device , Cheet_Loop , DA_Byte_Name , Length
Device1_L1_Hist , DA_HIST , 0 , Passive , Node_A , None , History , ALL , 1 , DA_HIST_EVENT , 256
Event codes are stored in this
Data Array. Event history records are stored in this Data Array.
The contents of the Data Array locations are
described in Appendix D.3. Each event record
uses at least 65 consecutive elements of the array
so the choice of an offset must be made carefully.
One device is processed using this Map
Descriptor. Thus only events relating to
device 20 of loop 1 will be stored using
this Map Descriptor. Events relating to
other devices will be discarded unless
additional Map Descriptors are defined.
Differs from Example 9 in that the
device is specified as ALL - now the
driver stores the event for any
device at the same location.