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Appendix A
Data from the sensors is mapped as follows in the gateway.
Data Arrays
The gateway is capable of supporting multiple protocols depending on the specific module that is used and how it is configured.
Parameter
COMM_CHANNEL
COMM_NET_ID
ACTIVE_SENSORS
SENSORS_WITH_LOW_BATTERY
REPEATER_MODE
TIMEOUT_CONFIG
SENSORS_IN_TIMEOUT
SOFTWARE_VERSION
Nx_PWR
Nx_DELTA_T
Nx_S1
Nx_S2
Nx_S3
Nx_S4
Nx_S5
Nx_S6
Nx_S7
Nx_S8
Nx_TXID
Note - "x" is a number from 1 – 100, corresponding to the each sensor node in the system. A BACnet object is defined for all
nodes, regardless of whether or not they are active in the system.
MODBUS Register Map
Array
Starting Address
TXID
30001
PWR
30101
SECS
30201
S1
30301
S2
30401
S3
30501
S4
30601
S5
30701
S6
30801
S7
30901
S8
31001
STATUS
31101
The Sensor ID is the index in the arrays listed above. For example, to find the S1 data for Sensor 15, go to address 30315
Wireless Sensor System
Communication channel of system
Communication network ID of system
Number of sensors active in system
Number of sensors that are sending a low battery signal
"1" means gateway is set as a repeater
Value (minutes) of timeout setting; "0" means mode is disabled
Number of sensors currently in timeout, if mode enabled
Version of gateway software
Battery voltage, or RSSI of RF powered sensors
Time (seconds) since the last packet was received
Sensor input 1
Sensor input 2
Sensor input 3
Sensor input 4
Sensor input 5
Sensor input 6
Sensor input 7
Sensor input 8
Transmitter ID (only valid in RF powered sensors)
Length
Type
100
Integer
Transmitter ID - only used for RF-powered nodes
Battery voltage, displayed as 2-digit integer (e.g. 3.6V = 36, 5.4V =
100
Integer
54) or RSSI (1-5) or received RF-power.
Time (seconds) since last update. This is refreshed at 10 second
100
Integer
intervals in groups of 10 (e.g. 1-10, 11-20, 21-30, etc.).
100
Integer
Sensor input 1, scaled up 10X
100
Integer
Sensor input 2, scaled up 10X
100
Integer
Sensor input 3, scaled up 10X
100
Integer
Sensor input 4, scaled up 10X
100
Integer
Sensor input 5, scaled up 10X
100
Integer
Sensor input 6, scaled up 10X
100
Integer
Sensor input 7, scaled up 10X
100
Integer
Sensor input 8, scaled up 10X
100
Integer
Gateway Status Parameters,, not used in this demo
- 22 -
Configuration Port
Description
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