Wait passively for events to be sent from the panel.
These Map descriptors each capture event data from different Cards.
Map_Descriptors,
| Map_Descriptors | Map_Descriptor_Name | Data_Array_Name | Data_Array_Offset | Function | Node_Name | sim4100_func | sim4100_card | sim4100_point | sim4100_sub | protocollength |
| Card 1 Msgs | DA_C_001 | 1 | Passive Client | Simplex_01 | Xpoint | 1 | 0 | 3 | Sim4100 | 300 |
| Card 2 Msgs | DA_C_002 | 2 | Passive Client | Simplex_01 | xpoint | 2 | 0 | 2 | Sim4100 | 300 |
| Psuedo Point Msgs | DA_C_128 | 4 | Passive Client | Simplex_01 | xpoint | 128 | 0 | 4 | Sim4100 | 200 |
A single point can report 8 states. We store these 8 states as bits inside a storage word. The word can be served on BACnet (or Modbus) as a number or it can be unpacked into individual bits and served bit by bit.
For example. 1-0-0 reports an alarm. We store the value 1 in the word allocated for this point.
For example. 1-0-0 reports an trouble. We store the value 16 in the word allocated for this point.
Thus if 1-0-0 was in an alarm and trouble at the same time, we would store the value 17 = 1 + 16.
Bit Identifier Description
0 F Fire Alarm
1 P Priority 2
2 S Supervisory
3 T Trouble
4 U Utility
5 C Control
6 D Disable
7 A Primary state (based on point type – F if smoke detector, C if signal circuit, etc.)
In the example
Bacnet Object AI(101) contains the number
CPS=1-0-0 State No , Server , DA_C_001 , 0 , Virtual_Panel ,AI , Present_Value,00101 , 1 ,No_Units
Bacnet Object BI(101) contains the alarm state. You can see the server map descriptor references DA_C_001b (a bit array). The bit array gets its data from a Move. The Move unpacks bits from the number values into individual bits.
CPS=1-0-0 Alarm , Server , DA_C_001b , 0 , Virtual_Panel ,bI , Present_Value,00101 , 1 ,Alarm ,Normal
Each BACnet object must have a unique (Type,Object_ID) pair.