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Boiler BACnet IP gateway · BACnet points list
Viessmann Vitocrossal 200 CI2 (WAGO Automation Gateway) BACnet points list
Updated 28 October 2026
Viessmann connects the Vitocrossal 200 CI2 to a BMS through a WAGO Automation Gateway that talks CAN to the boiler and exposes BACnet IP objects. The list covers external demand and operating-program commands for the boiler, DHW and four heating circuits, temperatures, burner modulation and hours, a second burner and O2 values, cascade sequence positions, fault codes and energy and gas statistics. Points must be selected in the gateway before they appear on BACnet.
This page lists 129 BACnet objects for the Viessmann Vitocrossal 200 CI2 (WAGO Automation Gateway) — 15 of them writable — with each object’s type, instance number, name, engineering units and access. It is re-typed from Viessmann’s own free documentation, linked below.
- Manufacturer
- Viessmann
- Model
- Vitocrossal 200 CI2 (WAGO Automation Gateway)
- Equipment
- Boiler BACnet IP gateway
- Equipment type
- Boilers & water heaters
- BACnet objects
- 129 (15 writable)
- Transport
- BACnet IP
- Firmware
- Not stated
- Also known as
- Vitocrossal 200, Vitocrossal CI2, Viessmann WAGO gateway, WAGO Automation Gateway BACnet/IP, 6178 508
BMS integration notes: Viessmann Vitocrossal 200 CI2 (WAGO Automation Gateway)
Select the needed points in the gateway's web visualization and save, then set Heartbeat Monitoring. The BMS writes MV 3 for the heating program plus AV 2 (supply temperature) or AV 1 (modulation), and keeps rewriting MV 1 with 3 every 10 s so the boiler accepts them. Read flame, supply temperature, modulation, the fault flag and fault codes, and watch BI 1 for the gateway-to-boiler link.
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 3 | Boiler operating program: Target | Heating program: internal, modulation, supply temp, locked | Write |
| AV 2 | Target supply temperature | Boiler supply temperature setpoint | Write |
| AV 1 | Burner modulation, target value | Burner modulation command, 0-100 %; single boiler only | Write |
| MV 1 | External demand | Write 3 (BACnet) every 10 s or BMS setpoints drop | Write |
| BI 2 | Burner | Flame status; list prints 0 = On, 1 = Off | Read |
| AI 1 | Supply temperature | Boiler supply water temperature | Read |
| AI 7 | Burner modulation | Actual burner modulation, % | Read |
| BI 5 | Faults | Any boiler fault present | Read |
| AI 14 | Fault number 1 | First active fault code | Read |
| BI 1 | Connection to the boiler | Gateway-to-boiler link; 0 = no connection | Read |
Enable & remote start
The BMS writes setpoints through the gateway's writable values: MV 3 picks the heating-mode program (internal value, target modulation, target supply temperature, target supply temperature exclusive, locked), AV 2 is the supply temperature target and AV 1 the modulation target. DHW uses MV 2 and AV 3; heating circuits 1-4 use MV 4-7 and AV 4-7. The boiler only accepts these while MV 1 External demand is written from the BMS (see heartbeat).
Heartbeat & communication loss
With Heartbeat Monitoring enabled (the gateway default, set in Project Settings), the BMS must write MV 1 External demand with 3 (BACnet) at least every 10 s. The gateway passes it to the boiler and resets MV 1 to 1; if the writes stop, the boiler goes back to its internal setpoints. With monitoring disabled MV 1 must still be written once, and the boiler keeps the last BMS setpoints after a communication loss.
Network setup
- The gateway (WAGO PFC200 750-8212, BACnet IP, B-BC profile) ships with IP address 192.168.1.17; change it in Web-Based Management at https://<gateway-ip>/wbm.
- No data points are published by default: in the web visualization (https://<gateway-ip>/webvisu/webvisu.htm) run Show data points, select the points the BMS needs, then save the project or the selection is lost on reboot.
- The device instance, location and description are changed with the free WAGO BACnet Configurator; the device object name defaults to the gateway MAC address. The manual does not state a default instance.
- Metric or imperial units and the data point language are chosen in Project Settings.
- Cascaded devices mode handles up to eight boilers (CAN device IDs 70 for the master, 71-77 for the others); the master's objects use instances 1-1000 and each further boiler adds 1000.
Watch out for
- The commissioning manual says to write 3 to MV 1 for BACnet, and that the gateway resets MV 1 to 1 after passing each write to the boiler. The point list numbers MV 1's states from 0 and lists BACnet as state 2.
- When the gateway loses the CAN link to the boiler, the objects' Reliability changes to unreliable_other and their values stop updating.
- BI 2 Burner is listed as 0 = On, 1 = Off, the opposite of BI 16 Flame burner 2 (0 = Off, 1 = On); confirm on site.
- Once a configuration has been stored with the WAGO BACnet Configurator, point selection in the web visualization is greyed out; reset BACnet to factory settings to change it.
- Command and setpoint points are not available on lag boilers in a cascade; the list marks which points apply to a single boiler, a cascade control unit and a lag boiler.
Viessmann Vitocrossal 200 CI2 (WAGO Automation 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 | |||||
|---|---|---|---|---|---|---|
| AVmin | 1 | Burner modulation, target value | BMS burner modulation target (single boiler only) | % | Write | |
| AVmin | 2 | Target supply temperature | BMS boiler supply temperature target | °F/°C | Write | |
| AV | 3 | Target DHW temp. | BMS domestic hot water temperature target | °F/°C | Write | |
| AV | 4 | Heating circuit 1: Target temp. | Heating circuit 1: BMS supply or room temperature target | °F/°C | Write | |
| AV | 5 | Heating circuit 2: Target temp. | Heating circuit 2: BMS supply or room temperature target | °F/°C | Write | |
| AV | 6 | Heating circuit 3: Target temp. | Heating circuit 3: BMS supply or room temperature target | °F/°C | Write | |
| AV | 7 | Heating circuit 4: Target temp. | Heating circuit 4: BMS supply or room temperature target | °F/°C | Write | |
| MVmin | 1 | External demand | Requesting system / BMS heartbeat; see heartbeat notes | Write | 0=External demand: No connection, 1=DIO module connection is being established, 2=BACnet connection is being established, 3=KNX connection is being established, 4=Modbus connection is being established, 5=EEBus connection is being established, 6=Plug connection is being established | |
| MV | 2 | Domestic hot water operating program: Target | BMS operating program for DHW heating | Write | 0=Internal target value, 1=OFF, 2=ON, 3=Target supply temperature, 4=Target boiler modulation | |
| MVmin | 3 | Boiler operating program: Target | BMS operating program for heating mode | Write | 0=Internal target value, 1=Target boiler modulation, 2=Target supply temperature, 3=Target supply temperature exclusive, 4=Locked | |
| MV | 4 | Heating circuit 1 target | Heating circuit 1: BMS operating program | Write | 0=None, 1=Off, 2=Reduced, 3=Normal, 4=Comfort, 5=Target supply temperature, 6=Target room temperature | |
| MV | 5 | Heating circuit 2 target | Heating circuit 2: BMS operating program | Write | 0=None, 1=Off, 2=Reduced, 3=Normal, 4=Comfort, 5=Target supply temperature, 6=Target room temperature | |
| MV | 6 | Heating circuit 3 target | Heating circuit 3: BMS operating program | Write | 0=None, 1=Off, 2=Reduced, 3=Normal, 4=Comfort, 5=Target supply temperature, 6=Target room temperature | |
| MV | 7 | Heating circuit 4 target | Heating circuit 4: BMS operating program | Write | 0=None, 1=Off, 2=Reduced, 3=Normal, 4=Comfort, 5=Target supply temperature, 6=Target room temperature | |
| BV | 1 | Acknowledge maintenance | Acknowledge the maintenance message | Write | 0=No, 1=Yes | |
| AImin | 1 | Supply temperature | Primary circuit supply temperature after the boiler | °F/°C | Read | |
| AI | 2 | Outside temperature | Outdoor temperature | °F/°C | Read | |
| AI | 4 | Flue gas temperature | Flue gas temperature at the chimney inlet | °F/°C | Read | |
| AI | 5 | Primary circuit pump, target speed | Primary circuit pump target speed | % | Read | |
| AI | 6 | Thermal output | Current thermal output | kW | Read | |
| AImin | 7 | Burner modulation | Actual burner modulation | % | Read | |
| AI | 8 | Burner hours run | Boiler total hours run | h | Read | |
| AI | 9 | Burner runtime | Boiler operating hours | h | Read | |
| AI | 10 | Burner starts | Boiler total burner starts | Read | ||
| AI | 11 | DHW temperature | Actual DHW tank temperature | °F/°C | Read | |
| AI | 12 | Hot water temperature status: Target domestic hot water temperature | Target DHW tank temperature | °F/°C | Read | |
| AI | 13 | Maintenance number | Maintenance code | Read | ||
| AImin | 14 | Fault number 1 | Fault code 1 (see boiler service instructions) | Read | ||
| AI | 15 | Fault number 2 | Fault code 2 (see boiler service instructions) | Read | ||
| AI | 16 | Fault number 3 | Fault code 3 (see boiler service instructions) | Read | ||
| AI | 17 | Fault number 4 | Fault code 4 (see boiler service instructions) | Read | ||
| AI | 18 | Fault number 5 | Fault code 5 (see boiler service instructions) | Read | ||
| AI | 19 | Fault number 6 | Fault code 6 (see boiler service instructions) | Read | ||
| AI | 20 | Fault number 7 | Fault code 7 (see boiler service instructions) | Read | ||
| AI | 21 | Fault number 8 | Fault code 8 (see boiler service instructions) | Read | ||
| AI | 22 | Fault number 9 | Fault code 9 (see boiler service instructions) | Read | ||
| AI | 23 | Fault number 10 | Fault code 10 (see boiler service instructions) | Read | ||
| AI | 24 | Heating energy consumption: Today | Heating electrical energy use, today | kWh | Read | |
| AI | 25 | Electrical energy consumption of heating system: The last 7 days | Heating electrical energy use, last 7 days | kWh | Read | |
| AI | 26 | Electrical energy consumption of heating system: The current month | Heating electrical energy use, current month | kWh | Read | |
| AI | 27 | Electrical energy consumption of heating system: The last month | Heating electrical energy use, last month | kWh | Read | |
| AI | 28 | Electrical energy consumption of heating system: The current year | Heating electrical energy use, current year | kWh | Read | |
| AI | 29 | Electrical energy consumption of heating system: The last year | Heating electrical energy use, last year | kWh | Read | |
| AI | 30 | DHW energy consumption: Today | DHW electrical energy use, today | kWh | Read | |
| AI | 31 | Electrical energy consumption of DHW: The last 7 days | DHW electrical energy use, last 7 days | kWh | Read | |
| AI | 32 | Electrical energy consumption of DHW heating: The current month | DHW electrical energy use, current month | kWh | Read | |
| AI | 33 | Electrical energy consumption of the DHW heating: The last month | DHW electrical energy use, last month | kWh | Read | |
| AI | 34 | Electrical energy consumption of DHW heating: The current year | DHW electrical energy use, current year | kWh | Read | |
| AI | 35 | Electrical energy consumption of the DHW heating: The last year | DHW electrical energy use, last year | kWh | Read | |
| AI | 36 | Heating gas consumption: Today | Heating gas use, today | m³ | Read | |
| AI | 37 | Gas consumption of heating system: The last 7 days | Heating gas use, last 7 days | m³ | Read | |
| AI | 38 | Gas consumption of heating system: The current month | Heating gas use, current month | m³ | Read | |
| AI | 39 | Gas consumption of heating system: The last month | Heating gas use, last month | m³ | Read | |
| AI | 40 | Gas consumption of heating system: The current year | Heating gas use, current year | m³ | Read | |
| AI | 41 | Gas consumption of heating system: The last year | Heating gas use, last year | m³ | Read | |
| AI | 42 | DHW gas consumption: Today | DHW gas use, today | m³ | Read | |
| AI | 43 | Gas consumption of DHW: The last 7 days | DHW gas use, last 7 days | m³ | Read | |
| AI | 44 | Gas consumption of DHW: The current month | DHW gas use, current month | m³ | Read | |
| AI | 45 | Gas consumption of DHW: The last month | DHW gas use, last month | m³ | Read | |
| AI | 46 | Gas consumption of DHW: The current year | DHW gas use, current year | m³ | Read | |
| AI | 47 | Gas consumption of DHW: The last year | DHW gas use, last year | m³ | Read | |
| AI | 81 | Heating circuit 1: Target temperature | Heating circuit 1: target supply or room temperature | °F/°C | Read | |
| AI | 82 | Heating circuit 1: Supply temperature | Heating circuit 1: actual supply temperature | °F/°C | Read | |
| AI | 83 | Heating circuit 2: Target temperature | Heating circuit 2: target supply or room temperature | °F/°C | Read | |
| AI | 84 | Heating circuit 2: Supply temperature | Heating circuit 2: actual supply temperature | °F/°C | Read | |
| AI | 85 | Heating circuit 3: Target temperature | Heating circuit 3: target supply or room temperature | °F/°C | Read | |
| AI | 86 | Heating circuit 3: Supply temperature | Heating circuit 3: actual supply temperature | °F/°C | Read | |
| AI | 87 | Heating circuit 4: Target temperature | Heating circuit 4: target supply or room temperature | °F/°C | Read | |
| AI | 88 | Heating circuit 4: Supply temperature | Heating circuit 4: actual supply temperature | °F/°C | Read | |
| AI | 89 | Boiler target modulation value | Target burner modulation | % | Read | |
| AI | 90 | Heating circuit 1: Room temperature | Heating circuit 1: room temperature sensor | °F/°C | Read | |
| AI | 91 | Heating circuit 2: Room temperature | Heating circuit 2: room temperature sensor | °F/°C | Read | |
| AI | 92 | Heating circuit 3: Room temperature | Heating circuit 3: room temperature sensor | °F/°C | Read | |
| AI | 93 | Heating circuit 4: Room temperature | Heating circuit 4: room temperature sensor | °F/°C | Read | |
| AI | 94 | Low loss header: Supply temperature | Low loss header supply temperature | °F/°C | Read | |
| AI | 95 | Temperature demand | Temperature demand on the boiler | °F/°C | Read | |
| AI | 96 | Modulation demand | Modulation demand on the boiler | % | Read | |
| AI | 97 | Boiler: Boiler 1 sequence | Cascade switch-on/off position of boiler 1 | Read | ||
| AI | 98 | Boiler: Boiler 2 sequence | Cascade switch-on/off position of boiler 2 | Read | ||
| AI | 99 | Boiler: Boiler 3 sequence | Cascade switch-on/off position of boiler 3 | Read | ||
| AI | 100 | Boiler: Boiler 4 sequence | Cascade switch-on/off position of boiler 4 | Read | ||
| AI | 101 | Boiler: Boiler 5 sequence | Cascade switch-on/off position of boiler 5 | Read | ||
| AI | 102 | Boiler: Boiler 6 sequence | Cascade switch-on/off position of boiler 6 | Read | ||
| AI | 103 | Boiler: Boiler 7 sequence | Cascade switch-on/off position of boiler 7 | Read | ||
| AI | 104 | Boiler: Boiler 8 sequence | Cascade switch-on/off position of boiler 8 | Read | ||
| AI | 105 | Boiler: Boiler 9 sequence | Cascade switch-on/off position of boiler 9 | Read | ||
| AI | 106 | Boiler: Boiler 10 sequence | Cascade switch-on/off position of boiler 10 | Read | ||
| AI | 107 | Boiler: Boiler 11 sequence | Cascade switch-on/off position of boiler 11 | Read | ||
| AI | 108 | Boiler: Boiler 12 sequence | Cascade switch-on/off position of boiler 12 | Read | ||
| AI | 109 | Boiler: Boiler 13 sequence | Cascade switch-on/off position of boiler 13 | Read | ||
| AI | 110 | Boiler: Boiler 14 sequence | Cascade switch-on/off position of boiler 14 | Read | ||
| AI | 111 | Boiler: Boiler 15 sequence | Cascade switch-on/off position of boiler 15 | Read | ||
| AI | 112 | Boiler: Boiler 16 sequence | Cascade switch-on/off position of boiler 16 | Read | ||
| AI | 113 | O2 value of burner 1 | Burner 1 O2 probe value (diagnostics) | % | Read | |
| AI | 114 | Target O2 value, burner 1 | Burner 1 target O2 value (diagnostics) | % | Read | |
| AI | 115 | Modulation burner 2 | Burner 2 actual modulation | % | Read | |
| AI | 116 | Burner runtime, burner 2 | Burner 2 operating hours | h | Read | |
| AI | 117 | Starts burner 2 | Burner 2 starts | Read | ||
| AI | 118 | O2 value of burner 2 | Burner 2 O2 probe value (diagnostics) | % | Read | |
| AI | 119 | Target O2 value, burner 2 | Burner 2 target O2 value (diagnostics) | % | Read | |
| BImin | 1 | Connection to the boiler | CAN link between gateway and boiler | Read | 0=No connection, 1=Connection active | |
| BImin | 2 | Burner | Burner flame on/off | Read | 0=On, 1=Off | |
| BI | 3 | DHW pump | DHW tank charging pump on/off | Read | 0=OFF, 1=ON | |
| BI | 4 | Service messages | Maintenance message present | Read | 0=No maintenance message present, 1=Maintenance message present | |
| BImin | 5 | Faults | Fault present | Read | 0=No fault present, 1=Fault present | |
| BI | 6 | Heating circuit pump HC1 | Heating circuit 1 pump on/off | Read | 0=OFF, 1=ON | |
| BI | 7 | Heating circuit pump HC2 | Heating circuit 2 pump on/off | Read | 0=OFF, 1=ON | |
| BI | 8 | Heating circuit pump HC3 | Heating circuit 3 pump on/off | Read | 0=OFF, 1=ON | |
| BI | 9 | Heating circuit pump HC4 | Heating circuit 4 pump on/off | Read | 0=OFF, 1=ON | |
| BI | 10 | Heating zone 1: Demand | Heating zone 1 call for heat | Read | 0=Off, 1=On | |
| BI | 11 | Heating zone 2: Demand | Heating zone 2 call for heat | Read | 0=Off, 1=On | |
| BI | 12 | Heating zone 3: Demand | Heating zone 3 call for heat | Read | 0=Off, 1=On | |
| BI | 13 | Units not available in the cascade | Unit not available in the cascade | Read | 0=No, 1=Yes | |
| BI | 14 | Boiler circuit pump | Primary / boiler circuit pump on/off | Read | 0=Off, 1=On | |
| BI | 15 | Hydraulic flap state | Hydraulic flap open/closed | Read | 0=Closed, 1=Open | |
| BI | 16 | Flame burner 2 | Burner 2 flame on/off | Read | 0=Off, 1=ON | |
| MI | 1 | External demand: Status | Status of the external demand connection | Read | 0=External demand: No connection, 1=DIO module connection is being established, 2=BACnet connection is being established, 3=KNX connection is being established, 4=Modbus connection is being established, 5=EEBus connection is being established, 6=Plug connection is being established | |
| MI | 2 | Domestic hot water operating program: Actual | DHW heating operating program in use | Read | 0=Internal target value, 1=OFF, 2=ON, 3=Target supply temperature, 4=Target boiler modulation | |
| MI | 3 | Boiler operating program: Actual | Heating mode operating program in use | Read | 0=Internal target value, 1=Target boiler modulation, 2=Target supply temperature, 3=Target supply temperature exclusive, 4=Locked | |
| MI | 4 | Heating circuit 1 actual | Heating circuit 1: operating program in use | Read | 0=None, 1=Off, 2=Reduced, 3=Normal, 4=Comfort, 5=Target supply temperature, 6=Target room temperature | |
| MI | 5 | Heating circuit 2 actual | Heating circuit 2: operating program in use | Read | 0=None, 1=Off, 2=Reduced, 3=Normal, 4=Comfort, 5=Target supply temperature, 6=Target room temperature | |
| MI | 6 | Heating circuit 3 actual | Heating circuit 3: operating program in use | Read | 0=None, 1=Off, 2=Reduced, 3=Normal, 4=Comfort, 5=Target supply temperature, 6=Target room temperature | |
| MI | 7 | Heating circuit 4 actual | Heating circuit 4: operating program in use | Read | 0=None, 1=Off, 2=Reduced, 3=Normal, 4=Comfort, 5=Target supply temperature, 6=Target room temperature | |
| MI | 8 | Domestic hot water status | DHW heating status | Read | 0=OFF, 1=DHW only, 2=DHW and heating, 3=Emissions test mode WW, 4=Test mode, 5=External target temperature, 6=External target modulation, 7=Hygiene function, 8=Solar operation, FF=Automatic | |
| MI | 10 | Heating zone 1: Heating zone pump | Heating zone 1 pump state | Read | 0=Off, 1=On, 2=Short circuit/lead break | |
| MI | 11 | Heating zone 2: Heating zone pump | Heating zone 2 pump state | Read | 0=Off, 1=On, 2=Short circuit/lead break | |
| MI | 12 | Heating zone 3: Heating zone pump | Heating zone 3 pump state | Read | 0=Off, 1=On, 2=Short circuit/lead break | |
| MI | 13 | Type of demand | Kind of demand on the boiler | Read | 0=None, 1=Temperature demand, 2=Modulation demand | |
| MI | 14 | Thermostat switching state | Thermostat switching state (plug 96) | Read | 0=Off, 1=On, 2=Short circuit/lead break |
No points match these filters.
Integration notes
- Applies to the WAGO Automation Gateway BACnet IP sold by Viessmann; the boiler connects to the gateway over CAN.
- Only the BACnet IP objects are listed; the same document also gives Modbus TCP/RTU registers.
- Temperatures follow the gateway's metric/imperial setting; the list gives ranges in both °F and °C.
- Multistate states are shown as numbered in the list (from 0).
- The list says the today gas counters (AI 36, AI 42) count in steps of 0.1 m³.
- The list also has burner 2 and O2 probe points (AI 113-119, BI 16) and a hydraulic flap state (BI 15); the document does not say which boilers report them.
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 Vitocrossal 200 CI2 (WAGO Automation 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 Viessmann Vitocrossal 200 CI2 (WAGO Automation Gateway)
How many BACnet points does the Viessmann Vitocrossal 200 CI2 (WAGO Automation Gateway) have?
This list has 129 BACnet objects: 85 analog inputs, 7 analog values, 16 binary inputs, 1 binary value, 13 multi-state inputs, 7 multi-state values. The exact set on a given unit depends on its firmware, installed options and configuration.
Which Viessmann Vitocrossal 200 CI2 (WAGO Automation Gateway) BACnet points are writable?
15 of the 129 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 Viessmann Vitocrossal 200 CI2 (WAGO Automation Gateway) BACnet documentation?
The source is WAGO Gateway Data Points - Communication to a building management system (Vitocrossal 200 CI2) (6178 508-05), revision 01/2025, published free by Viessmann at https://www.viessmann-us.com/content/dam/public-brands/ca/pdfs/doc/wago/wago_gateway_vitocrossal_tdm.pdf/_jcr_content/renditions/original./wago_gateway_vitocrossal_tdm.pdf.
What are the minimum BACnet points to integrate the Viessmann Vitocrossal 200 CI2 (WAGO Automation Gateway)?
Start with MV 3 Boiler operating program: Target (Heating program: internal, modulation, supply temp, locked); AV 2 Target supply temperature (Boiler supply temperature setpoint); AV 1 Burner modulation, target value (Burner modulation command, 0-100 %; single boiler only); MV 1 External demand (Write 3 (BACnet) every 10 s or BMS setpoints drop); BI 2 Burner (Flame status; list prints 0 = On, 1 = Off); AI 1 Supply temperature (Boiler supply water temperature); AI 7 Burner modulation (Actual burner modulation, %); BI 5 Faults (Any boiler fault present); AI 14 Fault number 1 (First active fault code); BI 1 Connection to the boiler (Gateway-to-boiler link; 0 = no connection).
How do I enable BMS control of the Viessmann Vitocrossal 200 CI2 (WAGO Automation Gateway)?
The BMS writes setpoints through the gateway's writable values: MV 3 picks the heating-mode program (internal value, target modulation, target supply temperature, target supply temperature exclusive, locked), AV 2 is the supply temperature target and AV 1 the modulation target. DHW uses MV 2 and AV 3; heating circuits 1-4 use MV 4-7 and AV 4-7. The boiler only accepts these while MV 1 External demand is written from the BMS (see heartbeat).
Does the Viessmann Vitocrossal 200 CI2 (WAGO Automation Gateway) need a BACnet heartbeat or have a communication timeout?
With Heartbeat Monitoring enabled (the gateway default, set in Project Settings), the BMS must write MV 1 External demand with 3 (BACnet) at least every 10 s. The gateway passes it to the boiler and resets MV 1 to 1; if the writes stop, the boiler goes back to its internal setpoints. With monitoring disabled MV 1 must still be written once, and the boiler keeps the last BMS setpoints after a communication loss.
How do I check these points on the real Vitocrossal 200 CI2 (WAGO Automation 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.
More Viessmann BACnet points lists
Source: WAGO Gateway Data Points - Communication to a building management system (Vitocrossal 200 CI2) · 6178 508-05 · rev. 01/2025. Object names, instances and units are reproduced as published; descriptions are our own.