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Fan coil controller (via BACnet gateway) · BACnet points list
RHOSS KCMS fan coil controller via KGTW-BAC BACnet gateway BACnet points list
Updated 12 November 2026
KGTW-BAC is a DIN-rail Modbus RTU to BACnet gateway for RHOSS terminal units. With the KCMS_IP or KCMS_MSTP profile each KCMS fan coil shows up as a separate BACnet device with the 20 objects below: temperatures, setpoint, mode and fan speed commands, on/off, economy mode and an alarm code. BACnet IP and BACnet MS/TP are both available.
This page lists 20 BACnet objects for the RHOSS KCMS fan coil controller via KGTW-BAC BACnet gateway — 7 of them writable — with each object’s type, instance number, name, engineering units and access. It is re-typed from RHOSS’s own free documentation, linked below.
- Manufacturer
- RHOSS
- Model
- KCMS fan coil controller via KGTW-BAC BACnet gateway
- Equipment
- Fan coil controller (via BACnet gateway)
- Equipment type
- VAV boxes & fan coils
- BACnet objects
- 20 (7 writable)
- Transport
- BACnet IP, BACnet MS/TP
- Firmware
- Not stated
- Also known as
- KGTW-BAC, KCMS, KCMS_IP, KCMS_MSTP, KRS485, H58029
Reference only, provided as-is: verify against RHOSS’s current documentation and the live device before use. Not official RHOSS information. Terms of use.
BMS integration notes: RHOSS KCMS fan coil controller via KGTW-BAC BACnet gateway
Switch each fan coil with IP_FC01_OnOff (BV 1), set mode (MV 1), fan speed (MV 2) and setpoint (AV 1), then read the control probe, the setpoint in use and the alarm code. IP_FC01_Status (BI 6) shows whether the gateway still talks to the fan coil.
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 |
|---|---|---|---|
| BV 1 | IP_FC01_OnOff | Fan coil on/off (1 = On) | Write |
| MV 1 | IP_FC01_Mode | Mode command (3 = Cooling, 6 = Heating) | Write |
| MV 2 | IP_FC01_Fan | Fan speed command (1 = Auto) | Write |
| AV 1 | IP_FC01_Set | Room temperature setpoint | Write |
| AI 4 | IP_FC01_CtrlProbe | Control temperature | Read |
| AI 5 | IP_FC01_CtrlSet | Setpoint in use | Read |
| MI 1 | IP_FC01_Allarms | Alarm code (1 = No alarms) | Read |
| BI 6 | IP_FC01_Status | Fan coil online/offline status (1 = On) | Read |
Network setup
- Gateway default IP 192.168.1.24 / 255.255.255.0; it is set up from a web browser (no password at first).
- Each fan coil is added as a profile (model, Modbus address, BACnet description) and appears as its own BACnet device; its device instance is the base Instance_nr plus the Modbus address.
- The RHOSS side is Modbus RTU on RS485; BACnet MS/TP uses the second RS485 port (station address 1-254 as printed, Max Master 1-127, Info Frames settable).
- EDE files can be downloaded from http://<gateway IP>/ede.zip.
Watch out for
- All fan coils on one Modbus line must share baud rate, parity, data and stop bits; ask RHOSS before putting more than 32 devices on a line.
RHOSS KCMS fan coil controller via KGTW-BAC BACnet gateway 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.
| Description | States | |||||
|---|---|---|---|---|---|---|
| AI | 1 | IP_FC01_ProbeB1 | Probe B1, intake air temperature | Read | ||
| AI | 2 | IP_FC01_ProbeaBT | Probe BT, room air (inside control panel) | Read | ||
| AI | 3 | IP_FC01_ProbeB2 | Probe B2, water temperature | Read | ||
| AImin | 4 | IP_FC01_CtrlProbe | Control probe value | Read | ||
| AImin | 5 | IP_FC01_CtrlSet | Control setpoint in use | Read | ||
| AI | 6 | IP_FC01_FanSpeed | Actual fan speed | Read | ||
| AVmin | 1 | IP_FC01_Set | Setpoint | Write | ||
| AV | 2 | IP_FC01_IncrSetCool | Economy setpoint increase in cooling | Write | ||
| AV | 3 | IP_FC01_DecrSetHeat | Economy setpoint decrease in heating | Write | ||
| MImin | 1 | IP_FC01_Allarms | Alarms | Read | 1=No alarms, 2=Probe ST1 is faulty, 3=Probe ST2 is faulty, 4=Probe ST3 is faulty, 5=Anti-freeze, 6=Overheating, 7=Fan alarm, 8=Remote safety (SIC), 9=General alarm, 10=Faulty EEPROM | |
| MVmin | 1 | IP_FC01_Mode | Mode | Write | 1=Automatic, 2=Automatic + heater, 3=Cooling, 4=Dry, 5=Fan, 6=Heating, 7=Heating + heater | |
| MVmin | 2 | IP_FC01_Fan | Fan speed | Write | 1=Auto, 2=Minimum, 3=Medium, 4=Maximum | |
| BVmin | 1 | IP_FC01_OnOff | Unit on/off | Write | 0=Off, 1=On | |
| BV | 2 | IP_FC01_SleepEco | Economy mode on/off | Write | 0=Off, 1=On | |
| BI | 1 | IP_FC01_CoolEnable | Cool enable active (water too hot) | Read | 0=Off, 1=On | |
| BI | 2 | IP_FC01_HeatEnable | Heat enable active (water too cold) | Read | 0=Off, 1=On | |
| BI | 3 | IP_FC01_Eco | Economy mode enabled | Read | 0=Off, 1=On | |
| BI | 4 | IP_FC01_HeatReq | Heating request | Read | 0=Off, 1=On | |
| BI | 5 | IP_FC01_CoolReq | Cooling request | Read | 0=Off, 1=On | |
| BImin | 6 | IP_FC01_Status | Online/offline status | Read | 0=Off, 1=On |
No points match these filters.
Object ID lookup: RHOSS KCMS fan coil controller via KGTW-BAC point IDs by name
AI1IP_FC01_ProbeB1AI2IP_FC01_ProbeaBTAI3IP_FC01_ProbeB2AI4IP_FC01_CtrlProbeAI5IP_FC01_CtrlSetAI6IP_FC01_FanSpeedAV1IP_FC01_SetAV2IP_FC01_IncrSetCoolAV3IP_FC01_DecrSetHeatMI1IP_FC01_AllarmsMV1IP_FC01_ModeMV2IP_FC01_FanBV1IP_FC01_OnOffBV2IP_FC01_SleepEcoBI1IP_FC01_CoolEnableBI2IP_FC01_HeatEnableBI3IP_FC01_EcoBI4IP_FC01_HeatReqBI5IP_FC01_CoolReqBI6IP_FC01_Status
Integration notes
- The guide prints the English IP profile (KCMS_IPeng); the MS/TP profile and the Italian, German and French translations change the object names and descriptions only.
- Object names start with IP_FC01_ in the guide's example; the prefix follows the profile and unit set up in the gateway.
- The guide marks writable objects W and read-only objects R.
- On the KCMS, Modbus RTU is turned on with parameter P54 = 1 and the node ID is parameter P69 (1-207); the line runs at 9600 baud, 8N1.
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 KCMS fan coil controller via KGTW-BAC BACnet gateway 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 RHOSS KCMS fan coil controller via KGTW-BAC BACnet gateway
How many BACnet points does the RHOSS KCMS fan coil controller via KGTW-BAC BACnet gateway have?
This list has 20 BACnet objects: 6 analog inputs, 3 analog values, 6 binary inputs, 2 binary values, 1 multi-state input, 2 multi-state values. The exact set on a given unit depends on its firmware, installed options and configuration.
Which RHOSS KCMS fan coil controller via KGTW-BAC BACnet gateway BACnet points are writable?
7 of the 20 objects accept a write. Points marked Command have a priority array: a write holds until it is released, so release it back to automatic when you are done.
Where is the official RHOSS KCMS fan coil controller via KGTW-BAC BACnet gateway BACnet documentation?
The source is KGTW-BAC Bacnet Gateway - Istruzioni per l'uso / Instructions for use (H58029), published free by RHOSS at https://www.rhoss.it/wp-content/uploads/2022/07/H58029-KGTW-BAC-Modbus-RTU-Bacnet-IP-gateway-manual-IT-EN.pdf.
What are the minimum BACnet points to integrate the RHOSS KCMS fan coil controller via KGTW-BAC BACnet gateway?
Start with BV 1 IP_FC01_OnOff (Fan coil on/off (1 = On)); MV 1 IP_FC01_Mode (Mode command (3 = Cooling, 6 = Heating)); MV 2 IP_FC01_Fan (Fan speed command (1 = Auto)); AV 1 IP_FC01_Set (Room temperature setpoint); AI 4 IP_FC01_CtrlProbe (Control temperature); AI 5 IP_FC01_CtrlSet (Setpoint in use); MI 1 IP_FC01_Allarms (Alarm code (1 = No alarms)); BI 6 IP_FC01_Status (Fan coil online/offline status (1 = On)).
How do I check these points on the real KCMS fan coil controller via KGTW-BAC BACnet gateway?
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.
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Source: KGTW-BAC Bacnet Gateway - Istruzioni per l'uso / Instructions for use · H58029. Object names, instances and units are reproduced as published; descriptions are our own.