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Solar irradiance and weather sensor via BACnet gateway · BACnet points list
Chipkin Automation Systems CAS-2700-24 SMA Gateway - SensorBox objects BACnet points list
Updated 11 November 2026
The Chipkin CAS-2700-24 gateway reads an SMA SensorBox through a Sunny WebBox and serves 9 read-only Analog Inputs on BACnet IP: external and internal solar irradiance, operating time, ambient and module temperature in both F and C, and wind speed in m/s and mph.
This page lists 9 BACnet objects for the Chipkin Automation Systems CAS-2700-24 SMA Gateway - SensorBox objects — 0 of them writable — with each object’s type, instance number, name, engineering units and access. It is re-typed from Chipkin Automation Systems’s own free documentation, linked below.
- Manufacturer
- Chipkin Automation Systems
- Model
- CAS-2700-24 SMA Gateway - SensorBox objects
- Equipment
- Solar irradiance and weather sensor via BACnet gateway
- Equipment type
- Thermostats, sensors & meters
- BACnet objects
- 9 (0 writable)
- Transport
- BACnet IP
- Firmware
- Not stated
- Default device instance
- 389001
- Also known as
- SMA SensorBox BACnet, Sunny SensorBox BACnet, CAS-2700-24, Chipkin SMA gateway
Reference only, provided as-is: verify against Chipkin Automation Systems’s current documentation and the live device before use. Not official Chipkin Automation Systems information. Terms of use.
BMS integration notes: Chipkin Automation Systems CAS-2700-24 SMA Gateway - SensorBox objects
Add the WebBox and each SMA device on the gateway's configuration page, then read the Analog Inputs; the gateway is monitoring only.
Minimum points to map
The short list most integrators start with — enough to run the unit from a BMS. Map more as the job needs.
| Object | Name | Why | Access |
|---|---|---|---|
| AI 1 | ExlSolIrr | External solar irradiance | Read |
| AI 4 | TmpAmb F | Ambient temperature, F | Read |
| AI 5 | TmpMdul F | Module temperature, F | Read |
| AI 8 | WindVel m/s | Wind speed, m/s | Read |
Heartbeat & communication loss
If the gateway loses a device or a value can't be read, the object's Out_Of_Service is set true and the last good value stays in Present_Value.
Network setup
- Gateway default BACnet device instance 389001, UDP port 47808; give each gateway a unique instance.
- Enter the Sunny WebBox IP address and pick the device type (Invertor, SensorBox or Sunny Island) for each device in the gateway's web page.
- Only one Sunny WebBox per gateway.
Watch out for
- Watch Out_Of_Service rather than the value to spot lost data.
- Names are SMA channel codes; see the SMA documentation for scaling and units.
Chipkin Automation Systems CAS-2700-24 SMA Gateway - SensorBox objects BACnet objects
Type: AI, AO, AV, BI, BO, BV, MI/MO/MV (multi-state) · Access: Read read-only, Write writable, Command writable with a priority array.
Note: the source document has no read/write column, so access here is inferred from the object type (inputs read-only, values writable). Confirm on the live controller before writing.
| Description | States | |||||
|---|---|---|---|---|---|---|
| AImin | 1 | ExlSolIrr | Read | |||
| AI | 2 | IntSolIrr | Read | |||
| AI | 3 | OpTm | Read | |||
| AImin | 4 | TmpAmb F | Read | |||
| AImin | 5 | TmpMdul F | Read | |||
| AI | 6 | TmpAmb C | Read | |||
| AI | 7 | TmpMdul C | Read | |||
| AImin | 8 | WindVel m/s | Read | |||
| AI | 9 | WindVel mph | Read |
No points match these filters.
Object ID lookup: Chipkin Automation Systems CAS-2700-24 SMA SensorBox point IDs by name
Integration notes
- All objects are Analog Inputs; the manual gives names only, with no units or descriptions.
- Each further SMA device added to the gateway is offset by 100 (second device starts at AI 101, third at AI 201).
- The list is what the gateway exposes with its default configuration; the gateway polls the devices through one SMA Sunny WebBox.
- Access is inferred: Analog Inputs are read-only.
Check it against the live device. A points list tells you what the controller can expose; the unit in front of you may differ by firmware or installed options. This list is provided as-is for reference only and may contain mistakes — confirming it before you write, map or commission anything is up to you (terms). Easy BACnet scans a network for BACnet IP devices from an Android phone, reads every object on the CAS-2700-24 SMA Gateway - SensorBox objects and exports what it actually has to Excel — free. New to BACnet? Start with what a BACnet points list is and what the object types mean.
Questions about the Chipkin Automation Systems CAS-2700-24 SMA Gateway - SensorBox objects
How many BACnet points does the Chipkin Automation Systems CAS-2700-24 SMA Gateway - SensorBox objects have?
This list has 9 BACnet objects: 9 analog inputs. The exact set on a given unit depends on its firmware, installed options and configuration.
Which Chipkin Automation Systems CAS-2700-24 SMA Gateway - SensorBox objects BACnet points are writable?
None of the listed objects are marked writable in the source documentation. The source has no read/write column, so this is inferred from object type.
Where is the official Chipkin Automation Systems CAS-2700-24 SMA Gateway - SensorBox objects BACnet documentation?
The source is CAS-2700-24 SMA Gateway Manual (Modbus RTU and TCP / BACnet / HTML Gateway) (CAS-2700-24), revision Doc Rev 0, 12 Feb 2014, published free by Chipkin Automation Systems at https://cdn.chipkin.com/assets/uploads/2017/mar/09-14-31-59_CAS-2700-24%20-%20SMA%20to%20Modbus_RTU%20and%20TCP_%20BACnet%20and%20HTML%20Gateway%20Manual.pdf.
What are the minimum BACnet points to integrate the Chipkin Automation Systems CAS-2700-24 SMA Gateway - SensorBox objects?
Start with AI 1 ExlSolIrr (External solar irradiance); AI 4 TmpAmb F (Ambient temperature, F); AI 5 TmpMdul F (Module temperature, F); AI 8 WindVel m/s (Wind speed, m/s).
Does the Chipkin Automation Systems CAS-2700-24 SMA Gateway - SensorBox objects need a BACnet heartbeat or have a communication timeout?
If the gateway loses a device or a value can't be read, the object's Out_Of_Service is set true and the last good value stays in Present_Value.
How do I check these points on the real CAS-2700-24 SMA Gateway - SensorBox objects?
Scan the network with a BACnet IP browser such as Easy BACnet, open the device and compare its object list with this table. Anything missing is usually an option that isn't installed or a point that is disabled in the controller's configuration.
More Chipkin Automation Systems BACnet points lists
- Solar PV inverter via BACnet gateway
Chipkin Automation Systems CAS-2700-24 SMA Gateway - Sunny inverter objects
SMA Sunny inverters connected to a Sunny WebBox that the Chipkin CAS-2700-24 gateway polls.
Also known as: SMA Sunny Boy BACnet, SMA inverter BACnet, Sunny WebBox BACnet gateway, CAS-2700-24, Chipkin SMA gateway - Battery inverter (off-grid / backup) via BACnet gateway
Chipkin Automation Systems CAS-2700-24 SMA Gateway - Sunny Island objects
SMA Sunny Island battery inverters (with slave units and Sunny Island Chargers) on a Sunny WebBox polled by the Chipkin CAS-2700-24 gateway.
Also known as: SMA Sunny Island BACnet, Sunny Island battery inverter BACnet, CAS-2700-24, Chipkin SMA gateway
Source: CAS-2700-24 SMA Gateway Manual (Modbus RTU and TCP / BACnet / HTML Gateway) · CAS-2700-24 · rev. Doc Rev 0, 12 Feb 2014. Object names, instances and units are reproduced as published; descriptions are our own.