Boiler room and building systems over BACnet/IP right in the chat
Connect BACnet/IP to the AI agent: boiler-room temperatures, pumps, fans and setpoints of a building controller. The agent compares them and finds faulty points.
How the agent works with BACnet/IP
Data is collected on site by the gateway: a service installed on a computer in the site network that sends data out over an outgoing connection only. The connection takes the controller address, such as udp://10.0.5.20:47808, and is assigned to a gateway on the Gateways tab. The BACnet device instance can be left empty: the controller names it itself.
With an empty tag list the gateway reads the controller's Object_List and makes a tag of every value object, named by its Object_Name with units from Units. Each tag reads Status_Flags and Reliability beside its value: a fault or a nonzero Reliability makes the value bad, and an object out of service is marked uncertain. Requests go in ReadPropertyMultiple batches, and a device that does not support them is read one property at a time.
The connection only reads. The gateway sends no WriteProperty and no prioritized commands: the agent cannot change a setpoint or a pump's mode through it. The priority array and a binary object's relinquish default can be read as tags when you need to see what is commanding a point.
The gateway polls the controller at the set interval, once a second by default, sends a value when it changes (beyond the deadband, if one is set) and repeats a silent tag every 30 minutes. History is kept in the store and read for any period; when the link to the cloud drops, data waits on the gateway's disk and arrives once the link is back.
Integration scenarios
Boiler room temperatures
The agent reads supply, return and room temperatures with the units the controller itself names, and compares them with the setpoints.
Pumps, fans and valves
The agent shows which pumps and fans are running now, what state the multi-state objects are in and what has changed since the morning.
Faulty points
The agent finds the points the controller marks as faulty, unreliable or out of service, and names them by their object names.
How the night went
The agent pulls the value history for the night or the week and shows when a temperature left its range and for how long.
Controller inventory
Without a tag list the agent sees every value object of the controller: analog, binary, multi-state and counters, with their names and units.
Threshold task
The agent sets up an event task: for example, the supply temperature below a threshold for more than ten minutes. The task fires when the condition starts and when it clears.
BACnet/IP examples
Подача 68 °C при уставке 70, обратка 49 °C, в помещениях от 20 до 22 °C.
- Насос контура 2 работает, резервный стоит
- Датчик в серверной контроллер пометил неисправным, его значение не учитываю
Единицы беру у самого контроллера, а не подставляю свои.
How to connect
Before you connect
- A controller or router with BACnet/IP
- A computer in the site network running the gateway service
- Access from that computer to the controller over UDP, port 47808 by default
- For MS/TP devices: the network number behind the router and the device's MAC
- Server admits listed addresses only? Allow connections from 158.160.205.91 and 87.228.27.163.
- 1
Find the controller's IP address
You need the address of the BACnet/IP controller or of the BACnet router in front of it. The gateway sends its requests straight there, to UDP port 47808 by default.
- 2
Open UDP 47808 to the controller
The gateway computer has to reach the controller over UDP and get its answer back. A firewall between them lets this exchange through both ways.
- 3
For MS/TP, note the network and MAC
If the device sits on an MS/TP line behind a BACnet router, enter the router's address, the network number behind it and the device's MAC there, always together.
- 4
Leave the building system's port free
If a building management system already uses 47808 on the gateway computer, keep the gateway's UDP port at 0. Set 47808 only if the device answers to that port.
FAQ
Install the gateway service on a computer in the site network and add it on the Gateways tab. In the connection enter the controller address, for example udp://10.0.5.20:47808, and assign the connection to that gateway. The tag list can stay empty: the gateway reads the controller's objects itself.
The controller's analog, binary and multi-state inputs, outputs and values, counters, integer and text values, their names and units, value quality from Status_Flags and Reliability, and the value history.
No. The connection only reads: the gateway sends no property writes and no prioritized commands, so values and modes in the controller stay as you or the building management system set them.
Through a BACnet router: enter the router's address in the connection, and in the advanced fields the network number behind it and the device's MAC on that network (one byte for an MS/TP station, for example 05). Both fields are filled only together.