Borealis Automation Systems

ZVC Modbus Control

Taco ZVC control via Modbus and Home Assistant — RS485 TO ETH (B), HA YAML, wiring, and register tools.

Live
ZVC406-5RS485 TO ETH (B)Switch to Demo

Production control package

Borealis Automation field toolkit for Taco ZVC panels over Modbus and Home Assistant. Configure the gateway, generate YAML, and commission wiring — this path has no interactive zone sandbox.

Panel
ZVC406-5

6 zones

Gateway
rtuovertcp

192.168.1.254:4196

Package
Ready to deploy

Ready — configure gateway and deploy HA Modbus package.

RS485 TO ETH (B)

Site endpoint written into the Home Assistant package.

RS485 TO ETH (B)
RTU over TCP
slave 1
Host
192.168.1.254:4196
Serial side
9600 8N1
Web UI
http://192.168.1.254/

Deploy checklist

  1. Set RS485 TO ETH (B) IP and protocol on Gateway.
  2. Match serial baud/parity to the RTU I/O module.
  3. Name zones and confirm DIP mirrors below.
  4. Copy YAML from HA Config into Home Assistant and reload Modbus.
  5. Prove each zone coil write and end-switch feedback on site.

Zone roster

Names and enable flags used in the HA package. Coil addresses are production map bases.

1
call coil 0 · valve 16 · end 32
Priority
Enabled
2
call coil 1 · valve 17 · end 33
Enabled
3
call coil 2 · valve 18 · end 34
Enabled
4
call coil 3 · valve 19 · end 35
Enabled
5
call coil 4 · valve 20 · end 36
Enabled
6
call coil 5 · valve 21 · end 37
Enabled

Panel DIP mirrors

Document the physical DIP settings on the ZVC for the install record.

Master panel
Zone 1 priority
Post purge
Pump exercise
Valves without end switches

Interactive heat-call training is a separate product: open Demo. It does not write to production hardware from this package.

Borealis Automation Systems

Production package for Taco ZVC403/404/405/406-5 via RS485 TO ETH (B) and Home Assistant Modbus. Verify coil maps on hardware before writing live coils.