Easy BACnetHigh-pressure atomizing humidifier / cooler · BACnet points list
Neptronic SKH4 BACnet points list
Updated 28 October 2026
Short answer
The SKH4 pumps treated water to high-pressure nozzles for humidification or adiabatic cooling, serving up to six zones. BACnet MS/TP and BACnet IP are built in; besides system control sources and network RH/temperature inputs the guide lists per-zone control, occupancy, demand, readings, stage and communication objects.
This page lists 325 BACnet objects for the Neptronic SKH4 — 238 of them writable — with each object’s type, instance number, name, engineering units and access. It is re-typed from Neptronic’s own free documentation, linked below.
- Manufacturer
- Neptronic
- Model
- SKH4
- Equipment
- High-pressure atomizing humidifier / cooler
- Equipment type
- Humidifiers
- BACnet objects
- 325 (238 writable)
- Transport
- BACnet MS/TP, BACnet IP
- Firmware
- Not stated
- Default device instance
- 153000 + MAC address (153001 by default)
- Also known as
- SKH4 high-pressure atomizer, SKH4 BACnet
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BMS integration notes: Neptronic SKH4
Integration in brief
Choose a Network control profile (MSV 28) or demand source (MSV 43 = Network) and write demand to AV 138, or feed room RH/temperature readings (AV 106 / AV 155) for internal control. Per-zone control and occupancy are set with the Zone MSVs; watch BV 44 and the zone communication timeout BVs.
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 |
|---|---|---|---|
| MV 95 | Zone A Control | Zone A on/off: 1 = Off, 2 = Normal | Write |
| MV 96 | Zone A Occupancy | 1 = occupied, 2 = unoccupied, 3 = off | Write |
| MV 28 | Control Profile | Control profile: choose a Network profile | Write |
| AV 138 | Control Network Demand | Direct demand written by the BMS, % | Command |
| AV 107 | Room RH Setpoint | Occupied room RH setpoint (internal control) | Write |
| AV 106 | Room RH Network Reading | Network room RH reading for internal control | Command |
| MV 83 | System Power State | System on/off status | Read |
| AV 143 | User Demand | Current humidity demand % | Read |
| BV 68 | Drive State | Drive status: 0 = Ok, 1 = Fault | Read |
| BV 44 | Network Control State | 1 = fault: network control lost (AV 223 timeout) | Write |
Enable & remote start
No writable system on/off object is listed (MSV 83 System Power State is read-only in this guide). Zones are switched with the Zone x Control MSVs (1 = Off, 2 = Normal...) and Zone x Occupancy; the demand source comes from MSV 28 / MSV 43.
Heartbeat & communication loss
AV 223 Network Timeout (1-900 s) is how long the unit tries to reach the BACnet or Modbus network before it stops operating; BV 44 Network Control State shows 1 = Fault. AV 441 sets the internal zone communication timeout, with per-zone alarms BV 86-91.
Sensors & values from the BMS
Network room RH to AV 106 (MSV 33 = Network) with setpoints AV 107-109; room temperature to AV 155 for cooling profiles; supply high limit RH to AV 122 (MSV 38 = Network) and temperature to AV 175 (MSV 71 = Network). Direct demand goes to AV 138 and high limit to AV 139.
Network setup
- MS/TP MAC defaults to 1 (000-254; 128-254 are non-token-passing slaves); baud rate auto-detects (Auto, 9600, 19200, 38400, 76800); Max_Master 127.
- Device instance defaults to 153000 + MAC (153001 out of the box) and can be changed from the menu or by writing Device Object_Identifier.
- BACnet IP uses UDP 47808 (0xBAC0) by default.
- Network/communication settings are in the controller's Integration menu (password 5544); power-cycle after connecting to the network.
- Reinitialize Device (warm/cold reset) over BACnet uses the password 'nep'.
Watch out for
- MSV 'BACnet Server List Mode' chooses which objects are published (Integrator, Advanced, Factory); objects marked Advanced in the guide, such as the program objects, only show in Advanced mode.
- Writing Out_of_Service = True disconnects an object from its physical input so the Present_Value can be overwritten; remember to set it back.
- The unit signals alarms through object values only; it does not send BACnet event notifications, so poll or use COV.
- COV subscriptions are lost on a power cycle.
- Many AVs in this guide are commandable (Relinquish_Default listed); write at a consistent priority.
Neptronic SKH4 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 | 5 | Control Signal | Control demand analog input signal | V | Read | |
| AI | 6 | Room RH Signal | Room humidity analog input signal | V | Read | |
| AI | 7 | Supply RH Signal | Duct or supply high limit humidity analog input signal | V | Read | |
| AI | 15 | Water Temperature Signal | Water temperature sensor signal | V | Read | |
| AI | 16 | Pressure Sensor Signal | Pressure sensor signal | V | Read | |
| AI | 24 | Board Temperature Signal | Board temperature sensor signal | V | Read | |
| AI | 25 | Main Power Supply | Measured voltage in the power supply | V | Read | |
| AI | 28 | Room Temperature Signal | Room temperature sensor signal | V | Read | |
| AI | 29 | Supply Temperature Signal | Room temperature sensor signal | V | Read | |
| AI | 30 | Control Signal | Control signal | V | Read | |
| AO | 1 | Power Output Feedback Signal | Power output feedback signal | V | Read | |
| AO | 16 | Drive Signal | Drive signal | V | Command | |
| AV | 10 | MCU Load | Current microcontroller load | % | Read | |
| AV | 11 | Memory Load | Current memory load | % | Read | |
| AV | 21 | Demand | Demand | % | Read | |
| AV | 41 | Control Input | Current control input reading | % | Read | |
| AV | 42 | Control Min | Minimum value of the control demand analog input | % | Write | |
| AV | 43 | Control Max | Maximum value of the control demand analog input | % | Write | |
| AV | 44 | Control Bias | Bias value for the control demand analog input | % | Write | |
| AV | 49 | Room RH | Room humidity reading | %RH | Read | |
| AV | 50 | Room RH Min | Minimum value of the room humidity analog input | % | Write | |
| AV | 51 | Room RH Max | Maximum value of the room humidity analog input | % | Write | |
| AV | 52 | Room RH Bias | Bias value of the room humidity analog input | %RH | Write | |
| AV | 57 | Supply High Limit RH | Duct or supply high limit humidity analog input | %RH | Read | |
| AV | 58 | Supply High Limit RH Min | Minimum value of the duct or supply high limit humidity analog input | %RH | Write | |
| AV | 59 | Supply High Limit RH Max | Maximum value of the duct or supply high limit humidity analog input | %RH | Write | |
| AV | 60 | Supply High Limit RH Bias | Bias value of the duct or supply high limit humidity analog input | %RH | Write | |
| AV | 69 | Run Time | Number of seconds that the system has been powered on | h | Command | |
| AV | 70 | On Time | Total operating time of the humidifier | h | Command | |
| AV | 72 | Service On Time | Operating time of the humidifier since the last servicing | h | Command | |
| AV | 75 | Water Temperature | Temperature of water in the evaporation chamber | °F or °C | Read | |
| AV | 82 | Service Interval | System service interval | h | Read | |
| AV | 85 | Power Output Feedback Bias | Bias value for the power output feedback signal | V | Write | |
| AV | 86 | Power Output Feedback Min | Minimum value of the power output feedback signal | V | Write | |
| AV | 87 | Power Output Feedback Max | Maximum value of the power output feedback signal | V | Write | |
| AV | 88 | Power Output Feedback | Feedback value of the power output analog output | % | Command | |
| AV | 94 | Motor Speed | Motor speed | % | Write | |
| AVmin | 106 | Room RH Network Reading | Room relative humidity reading received from the network | %RH | Command | |
| AVmin | 107 | Room RH Setpoint | Room relative humidity setpoint received from the network | %RH | Write | |
| AV | 108 | Room RH Unoccupied Setpoint | Room relative humidity reading received from the network during no occupancy state | %RH | Write | |
| AV | 109 | Room RH Vacant Setpoint | Room relative humidity reading received from the network during vacancy | %RH | Write | |
| AV | 110 | Room RH Demand Proportional Gain | Room demand proportional gain | Write | ||
| AV | 111 | Room RH Demand Integral Time | Room demand integral time | s | Write | |
| AV | 112 | Room RH Demand Derivative Time | Room demand derivative time | s | Write | |
| AV | 120 | Room RH Demand | Humidity demand within the room | % | Command | |
| AV | 122 | RH Supply High Limit Network Reading | Supply high limit reading received from the network | %RH | Command | |
| AV | 123 | RH Supply High Limit Setpoint | Supply high limit setpoint received from the network | %RH | Write | |
| AV | 124 | RH Supply High Limit Unoccupied Setpoint | Supply high limit setpoint during the unoccupied mode | %RH | Write | |
| AV | 125 | RH Supply High Limit Vacant Setpoint | Supply high limit setpoint during the occupied mode | %RH | Write | |
| AV | 126 | RH Supply High Limit Proportional Gain | Supply high limit demand proportional gain | Write | ||
| AV | 127 | RH Supply High Limit Integral Time | Supply high limit demand integral time | s | Write | |
| AV | 128 | RH Supply High Limit Derivative Time | Supply high limit demand derivative time | s | Write | |
| AV | 136 | RH Supply High Limit Demand | Supply high limit humidity demand value | % | Command | |
| AVmin | 138 | Control Network Demand | Humidity control demand received from the network | % | Command | |
| AV | 139 | Control Network High Limit | Humidity control high limit received from the network | % | Command | |
| AVmin | 143 | User Demand | Measured humidity demand of the humidifier | % | Read | |
| AV | 151 | Room Temperature Min | Minimum value of the room temperature signal | °F or °C | Command | |
| AV | 152 | Room Temperature Max | Maximum value of the room temperature signal | °F or °C | Command | |
| AV | 153 | Room Temperature Bias | Bias value of the room temperature signal | °F or °C | Command | |
| AV | 155 | Room Temperature Network Reading | Room temperature network | °F or °C | Command | |
| AV | 156 | Room Temperature Setpoint | Room temperature setpoint | °F or °C | Command | |
| AV | 157 | Room Temperature Unoccupied Setpoint | Room temperature setpoint value used during unoccupied state | °F or °C | Command | |
| AV | 158 | Room Temperature Vacant Setpoint | Room temperature setpoint value used during occupied state | °F or °C | Command | |
| AV | 159 | Room Temperature Demand Proportional Gain | Room demand proportional gain | Command | ||
| AV | 160 | Room Temperature Demand Integral Time | Room demand integral time | s | Command | |
| AV | 161 | Room Temperature Demand Derivative Time | Room demand derivative time | s | Command | |
| AV | 169 | Room Temperature Demand | Room demand temperature | % | Read | |
| AV | 170 | HRL Temperature | Room temperature value measured by the HRL24 controller | °F or °C | Read | |
| AV | 171 | HRL Humidity | Room humidity value measured by the HRL24 controller | % | Read | |
| AV | 174 | Room Temp Demand Proportional Band | Room demand proportional band | % | Command | |
| AV | 175 | Temp Supply High Limit Network Reading | Temperature supply high limit network reading | °F or °C | Command | |
| AV | 176 | Temp Supply High Limit Setpoint | Supply high limit temperature setpoint value | °F or °C | Command | |
| AV | 177 | Temp Supply High Limit Unoccupied Setpoint | Supply high limit temperature setpoint value used during unoccupied state | °F or °C | Command | |
| AV | 178 | Temp Supply High Limit Vacant Setpoint | Supply high limit temperature setpoint value used during occupied state | °F or °C | Command | |
| AV | 179 | Temp Supply High Limit Proportional Gain | Supply high limit temperature proportional gain | Command | ||
| AV | 180 | Temp Supply High Limit Integral Time | Supply high limit demand integral time | s | Command | |
| AV | 181 | Modbus TCP IP Keep Alive Time Out | Amount of time the communication stays open before connection is cut out... | min | Command | |
| AV | 182 | Temp Supply High Limit Derivative Time | Supply high limit temperature derivative time | s | Command | |
| AV | 190 | Temp Supply High Limit Demand | The supply high limit demand temperature | % | Read | |
| AV | 193 | Temp Supply High Limit Proportional Band | The supply high limit demand proportional band | % | Read | |
| AV | 196 | Supply High Limit Temperature | The supply high limit temperature | °F or °C | Read | |
| AV | 197 | Supply High Limit Temperature Min | Configuration minimum value of the supply high limit temperature | °F or °C | Command | |
| AV | 198 | Supply High Limit Temperature Max | Configuration maximum value of the supply high limit temperature | °F or °C | Command | |
| AV | 199 | Supply High Limit Temperature Bias | Configuration bias value of the supply high limit temperature | °F or °C | Command | |
| AV | 220 | Demand Low Dead Band | Lower limit dead band value for the humidity demand | % | Command | |
| AV | 223 | Network Timeout | Amount of time the humidifier may attempt to connect to the BACnet... | s | Command | |
| AV | 230 | Room RH Demand Proportional Band | Room demand humidity proportional band | % | Command | |
| AV | 231 | RH Supply High Limit Proportional Band | The supply high limit humidity proportional band | % | Read | |
| AV | 234 | Control Timer | Control timer | s | Command | |
| AV | 235 | Zone A Demand | The demand for Zone A | % | Read | |
| AV | 236 | Zone A Temperature | Temperature for Zone A | °F or °C | Command | |
| AV | 237 | Zone A Humidity | Humidity for Zone A | %RH | Command | |
| AV | 240 | Zone B Demand | The demand for Zone B | % | Read | |
| AV | 241 | Zone B Temperature | Temperature for Zone B | °F or °C | Command | |
| AV | 242 | Zone B Humidity | Humidity for Zone B | %RH | Command | |
| AV | 245 | Zone C Demand | The demand for Zone C | % | Read | |
| AV | 246 | Zone C Temperature | Temperature for Zone C | °F or °C | Command | |
| AV | 247 | Zone C Humidity | Humidity for Zone C | %RH | Command | |
| AV | 250 | Zone D Demand | The demand for Zone D | % | Read | |
| AV | 251 | Zone D Temperature | Temperature for Zone D | °F or °C | Command | |
| AV | 252 | Zone D Humidity | Humidity for Zone D | %RH | Command | |
| AV | 255 | Zone E Demand | The demand for Zone E | % | Read | |
| AV | 256 | Zone E Temperature | Temperature for Zone E | °F or °C | Command | |
| AV | 257 | Zone E Humidity | Humidity for Zone E | %RH | Command | |
| AV | 260 | Zone F Demand | The demand for Zone F | % | Read | |
| AV | 261 | Zone F Temperature | Temperature for Zone F | °F or °C | Command | |
| AV | 262 | Zone F Humidity | Humidity for Zone F | %RH | Command | |
| AV | 263 | Stage 1 Capacity | Capacity for stage 1 | L/h | Command | |
| AV | 264 | Stage 1 Drain Volume | Drain volume for stage 1 | Command | ||
| AV | 265 | Stage 2 Capacity | Capacity for stage 2 | L/h | Command | |
| AV | 266 | Stage 2 Drain Volume | Drain volume for stage 2 | Command | ||
| AV | 267 | Stage 3 Capacity | Capacity for stage 3 | L/h | Command | |
| AV | 268 | Stage 3 Drain Volume | Drain volume for stage 3 | Command | ||
| AV | 269 | Stage 4 Capacity | Capacity for stage 4 | L/h | Command | |
| AV | 270 | Stage 4 Drain Volume | Drain volume for stage 4 | Command | ||
| AV | 271 | Stage 5 Capacity | Capacity for stage 5 | L/h | Command | |
| AV | 272 | Stage 5 Drain Volume | Drain volume for stage 5 | Command | ||
| AV | 273 | Stage 6 Capacity | Capacity for stage 6 | L/h | Command | |
| AV | 278 | Stage 6 Drain Volume | Drain volume for stage 6 | Command | ||
| AV | 279 | Stage 1 Drain Time | The drain time for stage 1 | s | Read | |
| AV | 280 | Stage 2 Drain Time | Drain time for stage 2 | s | Command | |
| AV | 281 | Stage 3 Drain Time | Drain time for stage 3 | s | Command | |
| AV | 282 | Stage 4 Drain Time | Drain time for stage 4 | s | Command | |
| AV | 283 | Stage 5 Drain Time | Drain time for stage 5 | s | Command | |
| AV | 284 | Stage 6 Drain Time | Drain time for stage 6 | s | Command | |
| AV | 307 | Stage 1 Idle Time | The idle time for stage 1 | s | Read | |
| AV | 308 | Stage 2 Idle Time | The idle time for stage 2 | s | Read | |
| AV | 309 | Stage 3 Idle Time | The idle time for stage 3 | s | Read | |
| AV | 310 | Stage 4 Idle Time | The idle time for stage 4 | s | Read | |
| AV | 311 | Stage 5 Idle Time | The idle time for stage 5 | s | Read | |
| AV | 312 | Stage 6 Idle Time | The idle time for stage 6 | s | Read | |
| AV | 313 | Stage 1 Run Time | The run time for stage 1 | s | Read | |
| AV | 314 | Stage 2 Run Time | The run time for stage 2 | s | Read | |
| AV | 315 | Stage 3 Run Time | The run time for stage 3 | s | Read | |
| AV | 316 | Stage 4 Run Time | The run time for stage 4 | s | Read | |
| AV | 317 | Stage 5 Run Time | The run time for stage 5 | s | Read | |
| AV | 318 | Stage 6 Run Time | The run time for stage 6 | s | Read | |
| AV | 319 | Stage 1 Cycle Count | The cycle count for stage 1 | Read | ||
| AV | 320 | Stage 2 Cycle Count | The cycle count for stage 2 | Read | ||
| AV | 321 | Stage 3 Cycle Count | The cycle count for stage 3 | Read | ||
| AV | 322 | Stage 4 Cycle Count | The cycle count for stage 4 | Read | ||
| AV | 323 | Stage 5 Cycle Count | The cycle count for stage 5 | Read | ||
| AV | 324 | Stage 6 Cycle Count | The cycle count for stage 6 | Read | ||
| AV | 325 | Cool Drain Timer | Cool drain timer | min | Command | |
| AV | 382 | Stage 1 Max On Time | Maximum on time for stage 1 | s | Command | |
| AV | 383 | Stage 2 Max On Time | Maximum on time for stage 2 | s | Command | |
| AV | 384 | Stage 3 Max On Time | Maximum on time for stage 3 | s | Command | |
| AV | 385 | Stage 4 Max On Time | Maximum on time for stage 4 | s | Command | |
| AV | 386 | Stage 5 MaxOn Time | Maximum on time for stage 5 | s | Command | |
| AV | 387 | Stage 6 Max On Time | Maximum on time for stage 6 | s | Command | |
| AV | 388 | Stage 1 Pause Time | Pause time for stage 1 | s | Command | |
| AV | 389 | Stage 2 Pause Time | Pause time for stage 2 | s | Command | |
| AV | 390 | Stage 3 Pause Time | Pause time for stage 3 | s | Command | |
| AV | 391 | Stage 4 Pause Time | Pause time for stage 4 | s | Command | |
| AV | 392 | Stage 5 Pause Time | Pause time for stage 5 | s | Command | |
| AV | 393 | Stage 6 Pause Time | Pause time for stage 6 | s | Command | |
| AV | 394 | Zone A Stage Opening Delay | Stage opening delay for zone A | s | Command | |
| AV | 395 | Zone B Stage Opening Delay | Stage opening delay for zone B | s | Command | |
| AV | 396 | Zone C Stage Opening Delay | Stage opening delay for zone C | s | Command | |
| AV | 397 | Zone D Stage Opening Delay | Stage opening delay for zone D | s | Command | |
| AV | 398 | Zone E Stage Opening Delay | Stage opening delay for zone E | s | Command | |
| AV | 399 | Zone F Stage Opening Delay | Stage opening delay for zone F | s | Command | |
| AV | 400 | Drain 1 Cycle Count | The drain cycle count for stage 1 | Read | ||
| AV | 401 | Drain 2 Cycle Count | The drain cycle count for stage 2 | Read | ||
| AV | 402 | Drain 3 Cycle Count | The drain cycle count for stage 3 | Read | ||
| AV | 403 | Drain 4 Cycle Count | The drain cycle count for stage 4 | Read | ||
| AV | 404 | Drain 5 Cycle Count | The drain cycle count for stage 5 | Read | ||
| AV | 405 | Drain 6 Cycle Count | The drain cycle count for stage 6 | Read | ||
| AV | 406 | Stage 1 On Time | The operating time of the humidifier since the last servicing for stage... | h | Read | |
| AV | 407 | Stage 2 On Time | The operating time of the humidifier since the last servicing for stage... | h | Read | |
| AV | 408 | Stage 3 On Time | The operating time of the humidifier since the last servicing for stage... | h | Read | |
| AV | 409 | Stage 4 On Time | The operating time of the humidifier since the last servicing for stage... | h | Read | |
| AV | 410 | Stage 5 On Time | The operating time of the humidifier since the last servicing for stage... | h | Read | |
| AV | 411 | Stage 6 On Time | The operating time of the humidifier since the last servicing for stage... | h | Read | |
| AV | 412 | Diagnostic Period | Value of the diagnostic period | min | Command | |
| AV | 414 | Zone A MAC | Value of the MAC address for Zone A | Command | ||
| AV | 415 | Zone B MAC | Value of the MAC address for Zone B | Command | ||
| AV | 416 | Zone C MAC | Value of the MAC address for Zone C | Command | ||
| AV | 417 | Zone D MAC | Value of the MAC address for Zone D | Command | ||
| AV | 418 | Zone E MAC | Value of the MAC address for Zone E | Command | ||
| AV | 419 | Zone F MAC | Value of the MAC address for Zone F | Command | ||
| AV | 420 | Control Input | Value of the control input | °F or °C | Command | |
| AV | 423 | Control Min | Minimum value of the control input | °F or °C | Command | |
| AV | 424 | Control Max | Maximum value of the control input | °F or °C | Command | |
| AV | 425 | Control Bias | Bias value of the control input | °F or °C | Command | |
| AV | 441 | Zone Communication Timeout Delay | Zone communication timeout delay | s | Command | |
| BI | 1 | Air Flow | Status of the airflow switch | Read | 0=Closed, 1=Open | |
| BI | 2 | Supply High Limit | Status of the high limit contact | Read | 0=Closed, 1=Open | |
| BI | 3 | Interlock | Status of the interlock | Read | 0=Closed, 1=Open | |
| BI | 4 | Binary External Demand | Status of the binary external demand | Read | 0=0%, 1=100% | |
| BI | 8 | Water Leak Detection | Whether a water leak has been detected | Read | 0=OK, 1=Leak | |
| BI | 14 | Drive Status | Status of the drive | Read | 0=Ok, 1=Fault | |
| BI | 19 | Inlet Pressure Switch | Whether the inlet pressure switch is available or not | Read | 0=Low, 1=Ok | |
| BI | 20 | RS485 Interface | Whether the RS485 interface is available or not | Read | 0=No, 1=Yes | |
| BI | 21 | Ethernet Interface | Whether the Ethernet interface is available or not | Read | 0=No, 1=Yes | |
| BI | 22 | Relay Fuse | Status of the relay fuse | Read | 0=Normal, 1=Open Fuse | |
| BI | 23 | Control PCB Fuse | Status of the control PCB fuse | Read | 0=Normal, 1=Open Fuse | |
| BO | 2 | Alarm Warning Relay | Alarm warning relay | Command | 0=Off, 1=On | |
| BO | 3 | Service Warning Relay | Service warning relay | Command | 0=Off, 1=On | |
| BO | 4 | Valve 1 | Valve 1 | Command | 0=Off, 1=On | |
| BO | 5 | Valve 2 | Valve 2 | Command | 0=Off, 1=On | |
| BO | 6 | Valve 3 | Valve 3 | Command | 0=Off, 1=On | |
| BO | 7 | Valve 4 | Valve 4 | Command | 0=Off, 1=On | |
| BO | 8 | Valve 5 | Valve 5 | Command | 0=Off, 1=On | |
| BO | 10 | Valve 6 | Valve 6 | Command | 0=Off, 1=On | |
| BO | 11 | Valve 7 | Valve 7 | Command | 0=Off, 1=On | |
| BO | 12 | Valve 8 | Valve 8 | Command | 0=Off, 1=On | |
| BO | 13 | Valve 9 | Valve 9 | Command | 0=Off, 1=On | |
| BO | 14 | Valve 10 | Valve 10 | Command | 0=Off, 1=On | |
| BO | 15 | Valve 11 | Valve 11 | Command | 0=Off, 1=On | |
| BO | 16 | Valve 12 | Valve 12 | Command | 0=Off, 1=On | |
| BO | 18 | Alarm LED | Alarm LED | Command | 0=Off, 1=On | |
| BO | 19 | Power LED | Power LED | Command | 0=Off, 1=On | |
| BO | 20 | Buzzer | Buzzer | Command | 0=Off, 1=On | |
| BO | 21 | Contactor Pump | Contactor pump | Command | 0=Off, 1=On | |
| BO | 22 | Drive Enable | Drive enable | Command | 0=Off, 1=On | |
| BV | 3 | Alarm Buzzer | Configuration value that enables or disables the alarm buzzer sound when there... | Write | 0=Normal, 1=Disabled | |
| BV | 17 | Service Due | Whether the humidifier is due for servicing | Read | 0=No, 1=Yes | |
| BV | 30 | Startup Line Rinse | Perform an automatic tank rinse cycle upon each start-up of the humidifier | Write | 0=Off, 1=On | |
| BV | 32 | Run While Service Alarm | Status of the run while service alarm | Write | 0=Not Allowed, 1=Allowed | |
| BV | 38 | HRL Lock Setpoint | Whether the setpoint obtained from the HRL24 controller can be modified | Command | 0=Unlock, 1=Lock | |
| BVmin | 44 | Network Control State | State of the control communication between the device and the BACnet network | Write | 0=Normal, 1=Fault | |
| BV | 52 | SMTP SSL | Use a secure socket layer encrypt the communication between the device and... | Write | 0=Off, 1=On | |
| BV | 53 | SMTP Port | Port number to be used for email transfer | Write | 0=25, 1=587 | |
| BV | 54 | Notify Alarm | Get notified of all humidifier alarm messages by email | Write | 0=Off, 1=On | |
| BV | 55 | Notify Warning | Get notified of all humidifier warning messages by email | Write | 0=Off, 1=On | |
| BV | 56 | Notify App Msg | Get notified of all humidifier event messages by email | Write | 0=Off, 1=On | |
| BVmin | 68 | Drive State | Status of the drive | Read | 0=Ok, 1=Fault | |
| BV | 70 | Stage 1 Diagnostic Enable | Status of the diagnostic enable for stage 1 | Write | 0=No, 1=Yes | |
| BV | 71 | Stage 2 Diagnostic Enable | Status of the diagnostic enable for stage 2 | Write | 0=No, 1=Yes | |
| BV | 72 | Stage 3 Diagnostic Enable | Status of the diagnostic enable for stage 3 | Write | 0=No, 1=Yes | |
| BV | 73 | Stage 4 Diagnostic Enable | Status of the diagnostic enable for stage 4 | Write | 0=No, 1=Yes | |
| BV | 74 | Stage 5 Diagnostic Enable | Status of the diagnostic enable for stage 5 | Write | 0=No, 1=Yes | |
| BV | 75 | Stage 6 Diagnostic Enable | Status of the diagnostic enable for stage 6 | Write | 0=No, 1=Yes | |
| BV | 86 | Zone A Communication Timeout | Status of the communication timeout for zone A | Read | 0=Ok, 1=Timeout | |
| BV | 87 | Zone B Communication Timeout | Status of the communication timeout for zone B | Read | 0=Ok, 1=Timeout | |
| BV | 88 | Zone C Communication Timeout | Status of the communication timeout for zone C | Read | 0=Ok, 1=Timeout | |
| BV | 89 | Zone D Communication Timeout | Status of the communication timeout for zone D | Read | 0=Ok, 1=Timeout | |
| BV | 90 | Zone E Communication Timeout | Status of the communication timeout for zone E | Read | 0=Ok, 1=Timeout | |
| BV | 91 | Zone F Communication Timeout | Status of the communication timeout for zone F | Read | 0=Ok, 1=Timeout | |
| BV | 98 | Low Water Temperature Warning | Status of the low water temperature warning | Read | 0=Ok, 1=Timeout | |
| CSV | 10 | HMI Overwrite | Overwrite the value displayed on the local display menu | Write | ||
| CSV | 22 | SMTP Server IP Address | Server IP address for the email account | Write | ||
| CSV | 24 | SMTP Mail From | Email address that will be sending the humidifier notification messages | Write | ||
| CSV | 25 | SMTP Mail To | Email address that will be receiving the humidifier notification messages | Write | ||
| CSV | 26 | SMTP Username | Login username for the email account | Write | ||
| CSV | 37 | SMTP Password | Login password for the email account | Write | ||
| CSV | 62 | EthernetMacAdd | MAC address of the Ethernet interface | Write | ||
| MV | 5 | System Log Verbose Level | Type of information to be stored on the log file | Write | 1=None, 2=Emergency, 3=Alert, 4=Critical, 5=Error, 6=Warning, 7=Notice, 8=Info, 9=Debug | |
| MV | 9 | BACnet Server Language | BACnet server language | Write | 1=English | |
| MV | 10 | BACnet Server List Mode | Category of BACnet objects to display | Write | 1=Integrator, 2=Advanced, 3=Factory | |
| MV | 11 | BACnet Server Units | Display units for the BACnet server | Write | 1=Metric, 2=Imperial | |
| MV | 24 | Control Signal Type | Signal type for the control demand analog input | Write | 1=0-10Vdc, 2=2-10Vdc, 3=4-20mA, 4=0-20mA | |
| MV | 25 | Room RH Signal Type | Signal type for the room humidity analog input | Write | 1=0-10Vdc, 2=2-10Vdc, 3=4-20mA, 4=0-20mA | |
| MV | 26 | Supply RH Signal Type | Signal type for the duct or supply high limit humidity analog input | Write | 1=0-10Vdc, 2=2-10Vdc, 3=4-20mA, 4=0-20mA | |
| MV | 27 | Request | Request for the humidifier | Write | 1=None, 2=ResetAlarms, 3=Drain, 4=ResetServCnt | |
| MVmin | 28 | Control Profile | Control profile | Write | 1=ExternAnalog, 2=ExternNetwork, 3=InternHumAnalog, 4=InternHumNetwork, 5=InternCoolAnalog, 6=InternCoolNetwork, 7=HRL Hum, 8=HRL Cool | |
| MV | 29 | Modulating High Limit Profile | A preconfigured control mode profile for the modulating high limit demand | Read | 1=Disabled, 2=ExternAnalog, 3=ExternNetwork, 4=InternHumAnalog, 5=InternHumNetwork, 6=InternCoolAnalog, 7=InternCoolNetwork, 8=Custom | |
| MV | 32 | Occupancy State | Occupancy state | Read | 1=Occupied, 2=Unoccupied, 3=Vacant, 4=Off | |
| MV | 33 | Room RH Source | Reading source for the room demand | Write | 1=None, 2=RoomRH, 3=Network, 4=HRL | |
| MV | 34 | Room RH Setpoint Source | Room demand setpoint source | Write | 1=None, 2=Internal, 3=ControlInput | |
| MV | 38 | RH Supply High Limit Reading Source | Reading source for the supply high limit demand | Write | 1=None, 2=SupplyHLRH, 3=Network | |
| MV | 39 | RH Supply High Limit Setpoint Source | Supply high limit demand setpoint source | Write | 1=None, 2=Internal, 3=ControlInput | |
| MV | 43 | Control Demand Source | Humidity control demand source | Write | 1=None, 2=ControlInput, 3=HumRoomDemand, 4=Network, 5=TempRoomDemand | |
| MV | 44 | Control High Limit Source | Current state of the safety control circuit and whether the circuit has... | Write | 1=None, 2=ControlInput, 3=RHSupplyHLDemand, 4=Network, 5=TempSupplyHLDemand | |
| MV | 46 | Control Binary Demand Source | Binary demand source | Write | 1=None, 2=BinaryExtDemand | |
| MV | 67 | Room Temperature Setpoint Source | Room temperature setpoint source | Write | 1=None, 2=Internal, 3=ControlInput | |
| MV | 71 | Temp Supply High Limit Reading Source | Temperature supply high limit reading source | Write | 1=None, 2=SupplyHLTemp, 3=Network | |
| MV | 72 | Temp Supply High Limit Setpoint Source | Temperature supply high limit setpoint source | Write | 1=None, 2=Internal, 3=ControlInput | |
| MV | 76 | Room Temperature Source | Room temperature source | Write | 1=None, 2=RoomTemp, 3=Network, 4=HRL | |
| MV | 77 | Room Temperature Signal Type | Room temperature signal type | Write | 1=0-10Vdc, 2=2-10Vdc, 3=4-20mA, 4=0-20mA | |
| MV | 78 | Supply Temperature Signal Type | Supply temperature signal type | Write | 1=0-10Vdc, 2=2-10Vdc, 3=4-20mA, 4=0-20mA | |
| MVmin | 83 | System Power State | Whether the system is powered on or off | Read | 1=Off, 2=On | |
| MVmin | 95 | Zone A Control | Control mode for zone A | Write | 1=Off, 2=Normal, 3=Airflow, 4=SupplyHighLimit, 5=Interlock | |
| MVmin | 96 | Zone A Occupancy | Occupied status for zone A | Write | 1=Occupied, 2=Unoccupied, 3=Off | |
| MV | 97 | Zone B Control | Control mode for zone B | Write | 1=Off, 2=Normal, 3=Airflow, 4=SupplyHighLimit, 5=Interlock | |
| MV | 98 | Zone B Occupancy | Occupied status for zone B | Write | 1=Occupied, 2=Unoccupied, 3=Off | |
| MV | 99 | Zone C Control | Control mode for zone C | Write | 1=Off, 2=Normal, 3=Airflow, 4=SupplyHighLimit, 5=Interlock | |
| MV | 100 | Zone C Occupancy | Occupied status for zone C | Write | 1=Occupied, 2=Unoccupied, 3=Off | |
| MV | 101 | Zone D Control | Control mode for zone D (printed as MAV.101) | Write | 1=Off, 2=Normal, 3=Airflow, 4=SupplyHighLimit, 5=Interlock | |
| MV | 102 | Zone D Occupancy | Occupied status for zone D | Write | 1=Occupied, 2=Unoccupied, 3=Off | |
| MV | 103 | Zone E Control | Control mode for zone E | Write | 1=Off, 2=Normal, 3=Airflow, 4=SupplyHighLimit, 5=Interlock | |
| MV | 104 | Zone E Occupancy | Occupied status for zone E | Write | 1=Occupied, 2=Unoccupied, 3=Off | |
| MV | 105 | Zone F Control | Control mode for zone F | Write | 1=Off, 2=Normal, 3=Airflow, 4=SupplyHighLimit, 5=Interlock | |
| MV | 106 | Zone F Occupancy | Occupied status for zone F | Write | 1=Occupied, 2=Unoccupied, 3=Off | |
| MV | 107 | Stage 1 Zone | Stage 1 zone | Write | 1=ZoneA, 2=ZoneB, 3=ZoneC, 4=ZoneD, 5=ZoneE, 6=ZoneF | |
| MV | 108 | Stage1 Drain | Stage 1 drain | Write | 1=Drain7, 2=Drain8, 3=Drain9, 4=Drain10, 5=Drain11, 6=Drain12 | |
| MV | 109 | Stage 2 Zone | Stage 2 zone | Write | 1=ZoneA, 2=ZoneB, 3=ZoneC, 4=ZoneD, 5=ZoneE, 6=ZoneF | |
| MV | 110 | Stage 2 Drain | Stage 2 drain | Write | 1=Drain7, 2=Drain8, 3=Drain9, 4=Drain10, 5=Drain11, 6=Drain12 | |
| MV | 111 | Stage 3 Zone | Stage 3 zone | Write | 1=ZoneA, 2=ZoneB, 3=ZoneC, 4=ZoneD, 5=ZoneE, 6=ZoneF | |
| MV | 112 | Stage 3 Drain | Stage 3 drain | Write | 1=Drain7, 2=Drain8, 3=Drain9, 4=Drain10, 5=Drain11, 6=Drain12 | |
| MV | 113 | Stage 4 Zone | Stage 4 zone | Write | 1=ZoneA, 2=ZoneB, 3=ZoneC, 4=ZoneD, 5=ZoneE, 6=ZoneF | |
| MV | 114 | Stage 4 Drain | Stage 4 drain | Write | 1=Drain7, 2=Drain8, 3=Drain9, 4=Drain10, 5=Drain11, 6=Drain12 | |
| MV | 115 | Stage 5 Zone | Stage 5 zone | Write | 1=ZoneA, 2=ZoneB, 3=ZoneC, 4=ZoneD, 5=ZoneE, 6=ZoneF | |
| MV | 116 | Stage 5 Drain | Stage 5 drain | Write | 1=Drain7, 2=Drain8, 3=Drain9, 4=Drain10, 5=Drain11, 6=Drain12 | |
| MV | 117 | Stage 6 Zone | Stage 6 zone | Write | 1=ZoneA, 2=ZoneB, 3=ZoneC, 4=ZoneD, 5=ZoneE, 6=ZoneF | |
| MV | 118 | Stage 6 Drain | Stage 6 drain | Write | 1=Drain7, 2=Drain8, 3=Drain9, 4=Drain10, 5=Drain11, 6=Drain12 | |
| MV | 120 | Cooling Drain Control Mode | Cooling drain control mode | Write | 1=Off, 2=TimeLatch | |
| MV | 135 | Low Water Temperature Alarm | Status of the low water temperature alarm | Write | 1=Alarm, 2=Warning | |
| MV | 160 | Diagnostic State | Status of the diagnostic state | Write | 1=Off, 2=On | |
| MV | 161 | Diagnostic Command | Status of the diagnostic command | Write | 1=Spray, 2=Drain | |
| MV | 162 | Control Signal Type | Control signal type | Write | 1=0-10Vdc, 2=2-10Vdc, 3=4-20mA, 4=0-20mA | |
| Other | 1 | NSDF Core Program | NSDF Core Program | Write | ||
| Other | 2 | Module 1 | Module 1 | Write | ||
| Other | 3 | Module 2 | Module 2 | Write | ||
| Other | 4 | Module 3 | Module 3 | Write | ||
| Other | 5 | Module 4 | Module 4 | Write | ||
| Other | 6 | Module 5 | Module 5 | Write | ||
| Other | 7 | Module 6 | Module 6 | Write | ||
| Other | 8 | Module 7 | Module 7 | Write | ||
| Other | 9 | Module 8 | Module 8 | Write | ||
| Other | 10 | Module 9 | Module 9 | Write | ||
| Other | 11 | Module 10 | Module 10 | Write | ||
| Other | 12 | Module 11 | Module 11 | Write | ||
| Other | 13 | Module 12 | Module 12 | Write | ||
| Other | 14 | Module 13 | Module 13 | Write | ||
| Other | 15 | NSDF Database | NSDF Database | Write | ||
| FILE | 1 | Core File. | Core File | Write | ||
| FILE | 2 | SysLogAlarm | System Log Alarm | Write | ||
| FILE | 7 | USB System Log File | USB System Log file | Write | ||
| FILE | 8 | USB System Alarm Log File | USB System Alarm Log file | Write | ||
| FILE | 16 | System Log File | System Log file | Write | ||
| FILE | 19 | UpdatePackageFile | Update Package file | Write | ||
| SCH | 1 | Occupancy Schedule | Weekly occupancy schedule to specify which occupancy state is active during specific... | Write | ||
| SCH | 2 | Drain Schedule | Customized draining schedule with up to six events per day | Write |
No points match these filters.
Integration notes
- Objects and their writable properties are taken from the guide's 'W?' column; Present_Value writable means the BMS can change it.
- Units follow the BACnet Server Units setting (Metric or Imperial).
- Zone B-F objects only apply when those zones are configured.
- MSV 101 is printed as MAV.101 in the guide; it is a multi-state value.
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. Easy BACnet scans a network for BACnet IP devices from an Android phone, reads every object on the SKH4 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 Neptronic SKH4
How many BACnet points does the Neptronic SKH4 have?
This list has 325 BACnet objects: 10 analog inputs, 2 analog outputs, 174 analog values, 11 binary inputs, 19 binary outputs, 25 binary values, 6 files, 2 schedules, 54 multi-state values, 7 characterstring values, 15 others. The exact set on a given unit depends on its firmware, installed options and configuration.
Which Neptronic SKH4 BACnet points are writable?
238 of the 325 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 Neptronic SKH4 BACnet documentation?
The source is SKH4 High-Pressure Atomizer BACnet Communication Module User Guide (SKH4-BACnet Guide-240126 (V1.00)), revision 2024-01-26, published free by Neptronic at https://www.neptronic.com/Humidifiers/pdf/2024/SKH4-BACnet%20Guide-240126%20(V1.00).pdf.
What are the minimum BACnet points to integrate the Neptronic SKH4?
Start with MV 95 Zone A Control (Zone A on/off: 1 = Off, 2 = Normal); MV 96 Zone A Occupancy (1 = occupied, 2 = unoccupied, 3 = off); MV 28 Control Profile (Control profile: choose a Network profile); AV 138 Control Network Demand (Direct demand written by the BMS, %); AV 107 Room RH Setpoint (Occupied room RH setpoint (internal control)); AV 106 Room RH Network Reading (Network room RH reading for internal control); MV 83 System Power State (System on/off status); AV 143 User Demand (Current humidity demand %); BV 68 Drive State (Drive status: 0 = Ok, 1 = Fault); BV 44 Network Control State (1 = fault: network control lost (AV 223 timeout)).
How do I enable BMS control of the Neptronic SKH4?
No writable system on/off object is listed (MSV 83 System Power State is read-only in this guide). Zones are switched with the Zone x Control MSVs (1 = Off, 2 = Normal...) and Zone x Occupancy; the demand source comes from MSV 28 / MSV 43.
Does the Neptronic SKH4 need a BACnet heartbeat or have a communication timeout?
AV 223 Network Timeout (1-900 s) is how long the unit tries to reach the BACnet or Modbus network before it stops operating; BV 44 Network Control State shows 1 = Fault. AV 441 sets the internal zone communication timeout, with per-zone alarms BV 86-91.
Can the BMS supply sensor values to the Neptronic SKH4?
Network room RH to AV 106 (MSV 33 = Network) with setpoints AV 107-109; room temperature to AV 155 for cooling profiles; supply high limit RH to AV 122 (MSV 38 = Network) and temperature to AV 175 (MSV 71 = Network). Direct demand goes to AV 138 and high limit to AV 139.
How do I check these points on the real SKH4?
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 Neptronic BACnet points lists
- Make-up air unit (electric heat)
Neptronic CMU Compact Make-up Air Unit
Neptronic CMU compact make-up air units with electric heating, EC fan, damper and optional exhaust fan outputs.
Also known as: CMU, Neptronic CMU - Fan coil unit controller
Neptronic EFCB Series Fan Coil Controller
Neptronic EFCB fan coil controllers (24, 120 or 240 Vac, 2 or 4 relays) for 2-pipe and 4-pipe fan coils with TFL/TDF room sensors.
Also known as: EFCB, EFCB10TU2, EFCB10TU4, EFCB11TU2, EFCB11TU4, EFCB12TU2, EFCB12TU4 - Fan coil unit controller
Neptronic EFCB-OE1 Series Fan Coil Controller
Neptronic EFCB-OE1 fan coil controllers (24 or 240 Vac, 0, 2 or 4 relays), an OEM variant of the EFCB series.
Also known as: EFCB-OE1, EFCB10T-OE1, EFCB12T-OE1, EFCB12TU2-OE1, EFCB12TU4-OE1 - VAV terminal unit controller
Neptronic EVCB14N Series VAV Controller
Neptronic EVCB14N networkable VAV controllers with integrated damper actuator, pressure-independent or pressure-dependent, with 0-4 triac outputs.
Also known as: EVCB14N, EVCB14NIT0S, EVCB14NIT2S, EVCB14NIT4S, EVCB14NDT4S, EVCB14NIT0SF, EVCB14NIT4SF - VAV terminal unit controller
Neptronic EVCB14NxT4X VAV Controller (external motor)
Neptronic EVCB14N VAV controllers with four triac outputs that drive an external damper motor, pressure independent (IT4X) or dependent (DT4X).
Also known as: EVCB14NxT4X, EVCB14NIT4X, EVCB14NDT4X - VAV terminal unit controller
Neptronic EVCB44N Series VAV Controller
Neptronic EVCB44N VAV controllers without triac outputs, pressure independent (IT0S) or pressure dependent (DT0S).
Also known as: EVCB44N, EVCB44NIT0S, EVCB44NDT0S - Dual duct VAV terminal controller
Neptronic EVCBM Dual Duct VAV Controller
Neptronic EVCBM master controller used on dual duct terminals, with a second (slave) airflow channel for the other duct.
Also known as: EVCBM, EVCBM Dual Duct, EVCB dual duct - Steam humidifier valve controller
Neptronic SKDESC-xB
Neptronic SKDESC-xB electronic controllers for steam-to-steam / direct steam injection humidifier valves (ESCJx jacketed, ESCMx models).
Also known as: SKDESC, SKDESCxB, ESCJx, ESCMx, Electronic Steam Controller - Electric steam humidifier
Neptronic SKE4
Neptronic SKE4 electric (heating element) steam humidifiers, indoor and outdoor versions.
Also known as: SKE4 electric steam humidifier, SKE4-N, SKE4-E, SKE4 BACnet - Gas-fired steam humidifier
Neptronic SKG4
Neptronic SKG4 gas-fired steam humidifiers with up to four humidifier modules.
Also known as: SKG4 gas fired humidifier, SKG4-N, SKG4-E, SKG4 BACnet - Reverse osmosis water treatment unit
Neptronic SKRO
Neptronic SKRO reverse osmosis water treatment units feeding humidifiers.
Also known as: SKRO reverse osmosis, SKRO BACnet - Steam-to-steam humidifier
Neptronic SKS4
Neptronic SKS4 steam-to-steam (boiler steam heated) humidifiers.
Also known as: SKS4 steam to steam humidifier, SKS4 BACnet - Evaporative humidifier
Neptronic SKV
Neptronic SKV evaporative (media) humidifiers with up to four modules.
Also known as: SKV evaporative humidifier, SKV BACnet - Evaporative cooler / humidifier
Neptronic SKVF
Neptronic SKVF series evaporative coolers (also used for humidification).
Also known as: SKVF evaporative cooler, SKVF Series, SKVF BACnet - Fan coil / zone thermostat controller
Neptronic TFxB Series Thermostat Controller
Neptronic TFxB24 communicating thermostats for 2-pipe and 4-pipe fan coils and zone heating/cooling, including the humidity (TFHB) and OE variants.
Also known as: TFCB24F3XYZ1, TFCB24F3XY2, TFHB24F3XYZ1, TFHB24F3XYZ2, TFCB24P3-OE1, TFHB24P3-OE1, TFHB24P3-OE2, TFxB24
Source: SKH4 High-Pressure Atomizer BACnet Communication Module User Guide · SKH4-BACnet Guide-240126 (V1.00) · rev. 2024-01-26. Object names, instances and units are reproduced as published; descriptions are our own.