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Mixing loop unit (valve + pump controller) · BACnet points list
Grundfos MIXIT mixing loop unit (BACnet MS/TP and IP) BACnet points list
Updated 4 November 2026
MIXIT combines a mixing valve, sensors and a controller that also runs the connected Grundfos pump. With the CONNECT upgrade it speaks BACnet MS/TP on its RS-485 terminals or BACnet IP on its RJ45 port. The object list covers bus control, start/stop, setpoint source and remote setpoint, pump control modes and duty points, limiters, weather curve, energy data and alarm/warning codes.
This page lists 121 BACnet objects for the Grundfos MIXIT mixing loop unit (BACnet MS/TP and IP) — 62 of them writable — with each object’s type, instance number, name, engineering units and access. It is re-typed from Grundfos’s own free documentation, linked below.
- Manufacturer
- Grundfos
- Model
- MIXIT mixing loop unit (BACnet MS/TP and IP)
- Equipment
- Mixing loop unit (valve + pump controller)
- Equipment type
- VFDs & pumps
- BACnet objects
- 121 (62 writable)
- Transport
- BACnet MS/TP, BACnet IP
- Firmware
- Not stated
- Default device instance
- 227005
- Also known as
- MIXIT, Grundfos MIXIT, MIXIT DYNAMIC, MIXIT CONNECT, BACnet for MIXIT
Reference only, provided as-is: verify against Grundfos’s current documentation and the live device before use. Not official Grundfos information. Terms of use.
BMS integration notes: Grundfos MIXIT mixing loop unit (BACnet MS/TP and IP)
Configure MIXIT and its fieldbus settings in Grundfos GO Remote first, and set a safe fallback setpoint on AV 6. Then write BO 0 = 1 (bus control), MV 0 = 3 (remote setpoint), the setpoint on AO 0 and BO 1 = 1 to start. Keep polling a point such as BI 0 every 30 s or MIXIT returns to its local setpoint.
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 |
|---|---|---|---|
| BO 0 | Set Control Source | Takes bus control (1) or gives it back (0) | Write |
| MV 0 | Config Temp Setpoint Source | Setpoint source; 3 = remote setpoint on AO 0 | Write |
| BO 1 | Set Start Stop | Start/stop (1 = start, 0 = stop and close valve) | Write |
| AO 0 | Set Temperature Setpoint Remote | Remote temperature setpoint, °C | Write |
| BO 2 | Reset fault | Resets alarms and warnings on a 0-to-1 edge | Write |
| BI 0 | Status Control Source | Confirms bus control | Read |
| MI 2 | Status System State | System state, e.g. 5 = temperature control | Read |
| AI 22 | Data Controlled Temp | Actual controlled temperature, °C | Read |
| BI 4 | Status Fault | System stopped by an alarm | Read |
| AI 37 | Status System Alarm Code | MIXIT alarm code | Read |
Enable & remote start
BO 0 Set Control Source = 1 puts MIXIT under bus control (BI 0 confirms). MV 0 = 3 makes AO 0 the setpoint; MV 0 = 5 uses the internal weather curve with the outdoor temperature written to AO 1. BO 1 starts (1) or stops (0) the system; stop also closes the valve.
Heartbeat & communication loss
The manual asks the BMS to keep communicating, e.g. read BI 0 every 30 s. If communication is lost MIXIT falls back to its local setpoint (AV 6). After a power failure it starts in local control, so the BMS must send the full start-up sequence again.
Sensors & values from the BMS
Outdoor temperature can come from the bus on AO 1 (MV 0 = 5). In heating coil and cooling applications the air temperature feedback can come from the bus on AO 2 after BO 7 = 1.
Network setup
- Default device instance 227005; a custom number can be enabled in Grundfos GO Remote and written to AV 0.
- MS/TP: MAC 0-127, default 5; Max Master 1-127 (default 127); baud set in Grundfos GO Remote. Built-in 120 ohm termination on a DIP switch; no bias resistors.
- IP: RJ45 port; static IP or DHCP (wait 1 minute for a DHCP address).
- No segmentation support.
Watch out for
- Avoid writing configuration (persistent) objects in the cyclic poll; read instead of rewriting every 30 s.
- Set AV 6 fallback setpoint separately for heating and cooling (switch with MO 4) in combined applications.
- BO 2 reset and BO 5 simulation are edge triggered.
- Pump control mode and duty points are separate for heating (MO 0, AV 7-9) and cooling (MO 3, AV 14-16).
Grundfos MIXIT mixing loop unit (BACnet MS/TP and IP) 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 | |||||
|---|---|---|---|---|---|---|
| BImin | 0 | Status Control Source | Bus control active | Read | 0=Local control, 1=Bus control | |
| BI | 1 | Status Fan and Dampers | Coil preheated, fan/dampers may run (heating coil) | Read | 0=Disabled, 1=Enabled | |
| BI | 2 | Status Actual Run State Pump | Actual pump run state | Read | 0=Stopped, 1=Started | |
| BI | 3 | Status Ready | System ready for operation | Read | 0=Not ready, 1=Ready | |
| BImin | 4 | Status Fault | System stopped by an alarm | Read | 0=No fault, 1=Fault | |
| BI | 5 | Status Alarm Simulation | Alarm/warning simulation active | Read | 0=Inactive, 1=Active | |
| BI | 6 | Notification Flow Temp High | Underfloor overheat detected | Read | 0=Not detected, 1=Detected | |
| BI | 7 | Notification Frost Risk Detected | Frost risk detected | Read | 0=Not detected, 1=Detected | |
| BI | 8 | Notification Supply Flow High | Supply flow above AV 10 limit for 3600 s (DYNAMIC variants only) | Read | 0=Not above, 1=Above | |
| BI | 9 | Notification Thermal Power High | Thermal power above AV 11 limit for 3600 s (DYNAMIC variants only) | Read | 0=Not above, 1=Above | |
| BI | 10 | Notification Return Temperature Threshold | Return temperature past AV 12 limit for 3600 s (DYNAMIC variants only) | Read | 0=Not exceeded, 1=Exceeded | |
| BI | 11 | Notification Differential Temperature High | Primary delta T past AV 13 limit for 3600 s (DYNAMIC variants only) | Read | 0=Not exceeded, 1=Exceeded | |
| BI | 12 | Bus Feedback Enabled | Air temperature feedback comes from the bus | Read | 0=False, 1=True | |
| BI | 13 | Heat Curve Slope Factor Enabled | Weather curve is non-linear | Read | 0=False, 1=True | |
| BI | 14 | Heat Curve Offset Range Exceeded | Weather curve offset outside -15..15 | Read | 0=Exceeded, 1=Not exceeded | |
| BI | 15 | Heat Curve Slope Factor Range Exceeded | Weather curve slope outside 0.4..2.0 | Read | 0=Exceeded, 1=Not exceeded | |
| BOmin | 0 | Set Control Source | Take bus control (1) or return to local (0) | Write | 0=Local control, 1=Bus control | |
| BOmin | 1 | Set Start Stop | Start/stop the system (stop also closes the valve) | Write | 0=Stop, 1=Start | |
| BOmin | 2 | Reset fault | Reset alarms and warnings (rising edge) | Write | ||
| BO | 3 | Enable Overheat Protection | Force the underfloor overheat indication | Write | 0=Disable, 1=Set | |
| BO | 4 | Enable Frost Protection, heating | Frost protection for heating coil application | Write | 0=Disable, 1=Enable | |
| BO | 5 | Set Fault Simulation | Start (rising edge) or stop alarm simulation | Write | ||
| BO | 7 | Enable Bus Feedback | Use air temperature feedback from the bus (AO 2) | Write | 0=Disable, 1=Enable | |
| BO | 8 | Enable Frost Protection Cooling Mode | Frost protection in cooling mode | Write | 0=Disable, 1=Enable | |
| BV | 0 | Config Supply Flow Limiting, Heating | Enable supply flow limit (AV 10) (DYNAMIC variants only) | Write | 0=Disabled, 1=Enabled | |
| BV | 1 | Config Thermal Power Limiting, Heating | Enable thermal power limit (AV 11) (DYNAMIC variants only) | Write | 0=Disabled, 1=Enabled | |
| BV | 2 | Config Return Temp Limiting, Heating | Enable return temperature limit (AV 12) (DYNAMIC variants only) | Write | 0=Disabled, 1=Enabled | |
| BV | 3 | Config Primary DeltaT Limiting, Heating | Enable primary delta T limit (AV 13) (DYNAMIC variants only) | Write | 0=Disabled, 1=Enabled | |
| BV | 4 | Config Supply Flow Limiting Cooling | Enable cooling supply flow limit (AV 17) (DYNAMIC variants only) | Write | 0=Disabled, 1=Enabled | |
| BV | 5 | Config Thermal Power Limiting Cooling | Enable cooling thermal power limit (AV 18) (DYNAMIC variants only) | Write | 0=Disabled, 1=Enabled | |
| BV | 6 | Config Return Temp Limiting Cooling | Enable cooling return temperature limit (DYNAMIC variants only) | Write | 0=Disabled, 1=Enabled | |
| BV | 7 | Config Primary Delta T Limiting Cooling | Enable cooling primary delta T limit (AV 20) (DYNAMIC variants only) | Write | 0=Disabled, 1=Enabled | |
| MI | 0 | Status Pump Control Mode, Heating and Cooling | Current pump control mode | Read | 1=Constant speed, 2=Constant pressure, 3=Proportional pressure, 4=AUTOADAPT, 5=Constant flow | |
| MI | 1 | Data Application Type Heating | Heating application type | Read | 1=Radiator heating, 2=Underfloor heating, 3=Heating coil | |
| MImin | 2 | Status System State | System state | Read | 1=Powering up, 2=Fault, 3=Ready, 4=Preheating heating coil, 5=Temperature control, 6=Frost protection, 7=Underfloor overheat protection, 8=Shut down (start signal removed), 10=Valve 100 % open (backup), 11=Return temperature control | |
| MI | 3 | Status Thermal selection | Heating or cooling active | Read | 1=Heating, 2=Cooling | |
| MI | 4 | Data Application type Cooling | Cooling application type | Read | 1=General cooling | |
| MI | 5 | Data Valve Mode | Valve mode | Read | 1=Injection 2 way, 2=Mixing 3 way, 3=Injection 3 way | |
| MO | 0 | Config Pump Control Mode, Heating | Pump control mode for heating | Write | 1=Constant speed, 2=Constant pressure, 3=Proportional pressure, 4=AUTOADAPT, 5=Constant flow | |
| MO | 1 | Set Manual Valve Function | Manual valve opening for service | Write | 1=Off, 2=100 % open, 3=50 % open, 4=25 % open, 5=0 % (closed) | |
| MO | 2 | Set Application Type Heating | Heating application type | Write | 1=Radiator heating, 2=Underfloor heating, 3=Heating coil | |
| MO | 3 | Config Pump Control Mode Cooling | Pump control mode for cooling | Write | 1=Constant speed, 2=Constant pressure, 3=Proportional pressure, 4=AUTOADAPT, 5=Constant flow | |
| MO | 4 | Config Thermal selection | Heating/cooling change-over (combined applications) | Write | 1=Heating, 2=Cooling | |
| MO | 5 | Set Application Type Cooling | Cooling application type | Write | 1=General cooling | |
| MO | 6 | Config Valve Mode | Valve mode | Write | 1=Injection 2 way, 2=Mixing 3 way, 3=Injection 3 way | |
| MO | 7 | Config Heating Cooling Selection | Thermal application mode | Write | 1=Heating, 2=Cooling, 3=Combined | |
| MVmin | 0 | Config Temp Setpoint Source | Source of the temperature setpoint | Write | 1=Default setpoint, 2=Analog input setpoint, 3=Remote setpoint (AO 0), 4=Weather curve with local outdoor sensor, 5=Weather curve with bus outdoor temp (AO 1) | |
| AI | 0 | Data Temp Setpoint Remote | Remote temperature setpoint received | °C | Read | |
| AI | 1 | Data Outdoor Temp Remote | Remote outdoor temperature received | °C | Read | |
| AI | 2 | Data Act Temp Setpoint | Temperature setpoint in use | °C | Read | |
| AI | 5 | Status Pump Warning Code | Pump warning code | Read | ||
| AI | 6 | Status Pump Alarm Code | Pump alarm code | Read | ||
| AI | 7 | Data Heating Energy | Lifetime heating energy (DYNAMIC variants only) | kWh | Read | |
| AI | 8 | Data Heating Power | Thermal power in heating mode (DYNAMIC variants only) | kW | Read | |
| AI | 9 | Data Cooling Energy | Lifetime cooling energy (DYNAMIC variants only) | kWh | Read | |
| AI | 10 | Data Cooling Power | Thermal power in cooling mode (DYNAMIC variants only) | kW | Read | |
| AI | 11 | Data Heat Temp Difference | Forward/return temperature difference (DYNAMIC variants only) | °C | Read | |
| AI | 12 | Data Pump Power | Pump electrical power | W | Read | |
| AI | 13 | Data percentage Speed | Pump speed, % of maximum | % | Read | |
| AI | 14 | Data Pump Operating Hours | Pump operating hours | h | Read | |
| AI | 15 | Data Pump Energy | Pump energy | kWh | Read | |
| AI | 16 | Data Flow Temp | Secondary flow temperature (from pump) | °C | Read | |
| AI | 17 | Data Supply Temp | Supply temperature at the valve | °C | Read | |
| AI | 19 | Data Logical Valve Opening | Valve opening request | % | Read | |
| AI | 20 | Data Valve Supply Flow | Primary flow at the A-port (DYNAMIC variants only) | m³/h | Read | |
| AI | 21 | Data Return Temperature | Return temperature at the valve | °C | Read | |
| AImin | 22 | Data Controlled Temp | Actual controlled temperature | °C | Read | |
| AI | 23 | Data Supply Source Setpoint | Supply source temperature reference | °C | Read | |
| AI | 24 | Data Pump Flow | Pump flow | m³/h | Read | |
| AI | 25 | Data Pump Head | Pump head | m | Read | |
| AI | 26 | Data Outdoor Temp | Outdoor temperature at the analog input | °C | Read | |
| AI | 27 | Data Zone Air Temp | Air temperature at the analog input | °C | Read | |
| AI | 28 | Data Bus Temperature Feedback | Air temperature feedback from the bus | °C | Read | |
| AI | 35 | Status System Warning Code | MIXIT warning code | Read | ||
| AI | 36 | Status System Sub Warning Code | Warning sub-code | Read | ||
| AImin | 37 | Status System Alarm Code | MIXIT alarm code | Read | ||
| AI | 38 | Status System Sub Alarm Code | Alarm sub-code | Read | ||
| AI | 39 | Data HeatingVolume | Total heating volume pumped (DYNAMIC variants only) | m³ | Read | |
| AI | 40 | Data CoolingVolume | Total cooling volume pumped (DYNAMIC variants only) | m³ | Read | |
| AI | 41 | Data VolWeightAvgT1Heat | Volume-weighted average T1, heating (DYNAMIC variants only) | °C·m³ | Read | |
| AI | 42 | Data VolWeightAvgT2Heat | Volume-weighted average T2, heating (DYNAMIC variants only) | °C·m³ | Read | |
| AI | 43 | Data VolWeightAvgT1Cool | Volume-weighted average T1, cooling (DYNAMIC variants only) | °C·m³ | Read | |
| AI | 44 | Data VolWeightAvgT2Cool | Volume-weighted average T2, cooling (DYNAMIC variants only) | °C·m³ | Read | |
| AI | 45 | Data MIXIT Operating Hours | MIXIT operating time | s | Read | |
| AOmin | 0 | Set Temperature Setpoint Remote | Temperature setpoint from the bus (needs MV 0 = 3) | °C | Write | |
| AO | 1 | Set Outdoor Temperature Remote | Outdoor temperature from the bus (needs MV 0 = 5) | °C | Write | |
| AO | 2 | Set Bus Temperature Feedback | Air temperature feedback from the bus (needs BO 7 = 1) | °C | Write | |
| AV | 0 | Config Custom Device Object Instance Number | Custom device instance (enable in Grundfos GO) | Write | ||
| AV | 1 | Config Product time and date | Clock, UNIX seconds | Write | ||
| AV | 2 | Set Simulation Event Code | Alarm/warning code to simulate | Write | ||
| AV | 3 | Set Simulation Event Sub Code | Sub-code to simulate | Write | ||
| AV | 4 | Config Heat curve offset (+/-) | Weather curve offset, +/-15 | °C | Write | |
| AV | 5 | Config Heat curve slope (+/-) | Weather curve slope, 0.4-2 | Write | ||
| AV | 6 | Config Default Temp Setpoint | Fallback setpoint if bus or sensor signal is lost | °C | Write | |
| AV | 7 | Config Pump Head Duty Point, Heating | Pump head duty point, heating | m | Write | |
| AV | 8 | Config Pump Flow Duty Point, Heating | Pump flow duty point, heating | m³/h | Write | |
| AV | 9 | Config Pump Speed DutyPoint, Heating | Pump speed in constant speed mode, heating | % | Write | |
| AV | 10 | Config Supply Flow Limit Heating | Primary flow limit, heating (DYNAMIC variants only) | m³/h | Write | |
| AV | 11 | Config Thermal Power Limit Heating | Thermal power limit, heating (DYNAMIC variants only) | kW | Write | |
| AV | 12 | Config Return Temp Limit Heating | Return temperature limit, heating (DYNAMIC variants only) | °C | Write | |
| AV | 13 | Config Primary DeltaT Limit Heating | Primary delta T limit, heating (DYNAMIC variants only) | °C | Write | |
| AV | 14 | Config Pump Head Duty Point Cooling | Pump head duty point, cooling (DYNAMIC variants only) | m | Write | |
| AV | 15 | Config Pump Flow Duty Point Cooling | Pump flow duty point, cooling (DYNAMIC variants only) | m³/h | Write | |
| AV | 16 | Config Pump Speed Duty Point Cooling | Pump speed in constant speed mode, cooling (DYNAMIC variants only) | % | Write | |
| AV | 17 | Config Supply Flow Limit Cooling | Primary flow limit, cooling (DYNAMIC variants only) | m³/h | Write | |
| AV | 18 | Config Thermal Power Limit Cooling | Thermal power limit, cooling (DYNAMIC variants only) | kW | Write | |
| AV | 19 | Config Return Temp Limit Cooling | Return temperature limit, cooling (DYNAMIC variants only) | °C | Write | |
| AV | 20 | Config Primary Delta T Limit Cooling | Primary delta T limit, cooling (DYNAMIC variants only) | °C | Write | |
| AV | 21 | Config Kp | Temperature controller gain, 0.1-20 | Write | ||
| AV | 22 | Config Ti | Temperature controller integral time, 0-3600 | Write | ||
| AV | 23 | Config Kvs | Valve capacity limit | Write | ||
| AV | 24 | Config Outdoor Temperature X1 | Weather curve outdoor point 1 | Write | ||
| AV | 25 | Config Setpoint Y1 | Weather curve setpoint 1 | Write | ||
| AV | 26 | Config Outdoor Temperature X2 | Weather curve outdoor point 2 | Write | ||
| AV | 27 | Config Setpoint Y2 | Weather curve setpoint 2 | Write | ||
| AV | 28 | Config Outdoor Temperature X3 | Weather curve outdoor point 3 | Write | ||
| AV | 29 | Config Setpoint Y3 | Weather curve setpoint 3 | Write | ||
| AV | 30 | Config Outdoor Temperature X4 | Weather curve outdoor point 4 | Write | ||
| AV | 31 | Config Setpoint Y4 | Weather curve setpoint 4 | Write | ||
| AV | 32 | Config Outdoor Temperature X5 | Weather curve outdoor point 5 | Write | ||
| AV | 33 | Config Setpoint Y5 | Weather curve setpoint 5 | Write |
No points match these filters.
Object ID lookup: Grundfos MIXIT mixing loop unit point IDs by name
BI0Status Control SourceBI1Status Fan and DampersBI2Status Actual Run State PumpBI3Status ReadyBI4Status FaultBI5Status Alarm SimulationBI6Notification Flow Temp HighBI7Notification Frost Risk DetectedBI8Notification Supply Flow HighBI9Notification Thermal Power HighBI10Notification Return Temperature ThresholdBI11Notification Differential Temperature HighBI12Bus Feedback EnabledBI13Heat Curve Slope Factor EnabledBI14Heat Curve Offset Range ExceededBI15Heat Curve Slope Factor Range ExceededBO0Set Control SourceBO1Set Start StopBO2Reset faultBO3Enable Overheat ProtectionBO4Enable Frost Protection, heatingBO5Set Fault SimulationBO7Enable Bus FeedbackBO8Enable Frost Protection Cooling ModeBV0Config Supply Flow Limiting, HeatingBV1Config Thermal Power Limiting, HeatingBV2Config Return Temp Limiting, HeatingBV3Config Primary DeltaT Limiting, HeatingBV4Config Supply Flow Limiting CoolingBV5Config Thermal Power Limiting CoolingBV6Config Return Temp Limiting CoolingBV7Config Primary Delta T Limiting CoolingMI0Status Pump Control Mode, Heating and CoolingMI1Data Application Type HeatingMI2Status System StateMI3Status Thermal selectionMI4Data Application type CoolingMI5Data Valve ModeMO0Config Pump Control Mode, HeatingMO1Set Manual Valve FunctionMO2Set Application Type HeatingMO3Config Pump Control Mode CoolingMO4Config Thermal selectionMO5Set Application Type CoolingMO6Config Valve ModeMO7Config Heating Cooling SelectionMV0Config Temp Setpoint SourceAI0Data Temp Setpoint RemoteAI1Data Outdoor Temp RemoteAI2Data Act Temp SetpointAI5Status Pump Warning CodeAI6Status Pump Alarm CodeAI7Data Heating EnergyAI8Data Heating PowerAI9Data Cooling EnergyAI10Data Cooling PowerAI11Data Heat Temp DifferenceAI12Data Pump PowerAI13Data percentage SpeedAI14Data Pump Operating HoursAI15Data Pump EnergyAI16Data Flow TempAI17Data Supply TempAI19Data Logical Valve OpeningAI20Data Valve Supply FlowAI21Data Return TemperatureAI22Data Controlled TempAI23Data Supply Source SetpointAI24Data Pump FlowAI25Data Pump HeadAI26Data Outdoor TempAI27Data Zone Air TempAI28Data Bus Temperature FeedbackAI35Status System Warning CodeAI36Status System Sub Warning CodeAI37Status System Alarm CodeAI38Status System Sub Alarm CodeAI39Data HeatingVolumeAI40Data CoolingVolumeAI41Data VolWeightAvgT1HeatAI42Data VolWeightAvgT2HeatAI43Data VolWeightAvgT1CoolAI44Data VolWeightAvgT2CoolAI45Data MIXIT Operating HoursAO0Set Temperature Setpoint RemoteAO1Set Outdoor Temperature RemoteAO2Set Bus Temperature FeedbackAV0Config Custom Device Object Instance NumberAV1Config Product time and dateAV2Set Simulation Event CodeAV3Set Simulation Event Sub CodeAV4Config Heat curve offset (+/-)AV5Config Heat curve slope (+/-)AV6Config Default Temp SetpointAV7Config Pump Head Duty Point, HeatingAV8Config Pump Flow Duty Point, HeatingAV9Config Pump Speed DutyPoint, HeatingAV10Config Supply Flow Limit HeatingAV11Config Thermal Power Limit HeatingAV12Config Return Temp Limit HeatingAV13Config Primary DeltaT Limit HeatingAV14Config Pump Head Duty Point CoolingAV15Config Pump Flow Duty Point CoolingAV16Config Pump Speed Duty Point CoolingAV17Config Supply Flow Limit CoolingAV18Config Thermal Power Limit CoolingAV19Config Return Temp Limit CoolingAV20Config Primary Delta T Limit CoolingAV21Config KpAV22Config TiAV23Config KvsAV24Config Outdoor Temperature X1AV25Config Setpoint Y1AV26Config Outdoor Temperature X2AV27Config Setpoint Y2AV28Config Outdoor Temperature X3AV29Config Setpoint Y3AV30Config Outdoor Temperature X4AV31Config Setpoint Y4AV32Config Outdoor Temperature X5AV33Config Setpoint Y5
Integration notes
- BACnet needs the CONNECT upgrade, and the protocol is selected and set up in Grundfos GO Remote.
- Objects marked "DYNAMIC variants only" (energy, flow and limiter points) exist only on MIXIT DYNAMIC.
- The manual prints units in square brackets after many object names (e.g. "[°C]"); they are moved to the units field here.
- BO 6 is mentioned as the cooling energy reset but is not in the object tables, so it is not listed.
- Temperatures are written in whole °C on the bus.
- MI 4 has no access column in the manual; it is read-only as an input object.
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 MIXIT mixing loop unit (BACnet MS/TP and IP) 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 Grundfos MIXIT mixing loop unit (BACnet MS/TP and IP)
How many BACnet points does the Grundfos MIXIT mixing loop unit (BACnet MS/TP and IP) have?
This list has 121 BACnet objects: 37 analog inputs, 3 analog outputs, 34 analog values, 16 binary inputs, 8 binary outputs, 8 binary values, 6 multi-state inputs, 8 multi-state outputs, 1 multi-state value. The exact set on a given unit depends on its firmware, installed options and configuration.
Which Grundfos MIXIT mixing loop unit (BACnet MS/TP and IP) BACnet points are writable?
62 of the 121 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 Grundfos MIXIT mixing loop unit (BACnet MS/TP and IP) BACnet documentation?
The source is BACnet for MIXIT - Functional profile and user manual (99258495), revision 11.2024, published free by Grundfos at https://api.grundfos.com/literature/Grundfosliterature-6012796.pdf.
What are the minimum BACnet points to integrate the Grundfos MIXIT mixing loop unit (BACnet MS/TP and IP)?
Start with BO 0 Set Control Source (Takes bus control (1) or gives it back (0)); MV 0 Config Temp Setpoint Source (Setpoint source; 3 = remote setpoint on AO 0); BO 1 Set Start Stop (Start/stop (1 = start, 0 = stop and close valve)); AO 0 Set Temperature Setpoint Remote (Remote temperature setpoint, °C); BO 2 Reset fault (Resets alarms and warnings on a 0-to-1 edge); BI 0 Status Control Source (Confirms bus control); MI 2 Status System State (System state, e.g. 5 = temperature control); AI 22 Data Controlled Temp (Actual controlled temperature, °C); BI 4 Status Fault (System stopped by an alarm); AI 37 Status System Alarm Code (MIXIT alarm code).
How do I enable BMS control of the Grundfos MIXIT mixing loop unit (BACnet MS/TP and IP)?
BO 0 Set Control Source = 1 puts MIXIT under bus control (BI 0 confirms). MV 0 = 3 makes AO 0 the setpoint; MV 0 = 5 uses the internal weather curve with the outdoor temperature written to AO 1. BO 1 starts (1) or stops (0) the system; stop also closes the valve.
Does the Grundfos MIXIT mixing loop unit (BACnet MS/TP and IP) need a BACnet heartbeat or have a communication timeout?
The manual asks the BMS to keep communicating, e.g. read BI 0 every 30 s. If communication is lost MIXIT falls back to its local setpoint (AV 6). After a power failure it starts in local control, so the BMS must send the full start-up sequence again.
Can the BMS supply sensor values to the Grundfos MIXIT mixing loop unit (BACnet MS/TP and IP)?
Outdoor temperature can come from the bus on AO 1 (MV 0 = 5). In heating coil and cooling applications the air temperature feedback can come from the bus on AO 2 after BO 7 = 1.
How do I check these points on the real MIXIT mixing loop unit (BACnet MS/TP and IP)?
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 Grundfos BACnet points lists
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Grundfos Level Control LC 2X1 controllers for one- or two-pump wastewater pits, fitted with a CIM 300 (BACnet MS/TP) or CIM 500 (BACnet IP) module.
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Grundfos Level Control LC 2X2 (CIM 300 / CIM 500)
Grundfos Level Control LC 2X2 controllers for submersible pump pits, fitted with a CIM 300 (BACnet MS/TP) or CIM 500 (BACnet IP) module.
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Source: BACnet for MIXIT - Functional profile and user manual · 99258495 · rev. 11.2024. Object names, instances and units are reproduced as published; descriptions are our own.