Hunton Group needed a Trane UC600 controller to serve data over Modbus RTU. Chipkin QuickServer handled the protocol conversion, reduced ambiguity around the point mapping, and gave the team documentation that made commissioning easier.
For Hunton Group, the main issue was not whether BACnet MS/TP and Modbus RTU could be bridged. It was making sure the Trane UC600 data was presented in the right direction, with the right point definitions, and in a format the downstream Modbus RTU network could use without extra guesswork. Chipkin provided a purpose-built Chipkin QuickServer, clarified the workflow early, and delivered up-to-date point documentation that made the next steps easier for the customer team.
At a Glance
- Industry: Building automation
- Location: Houston, Texas
- Customer: Hunton Group
- Facility type: Commercial building automation site
- Client role: BAS contractor / systems integrator
- Protocols: From: BACnet MS/TP → To: Modbus RTU
- Chipkin product: Chipkin QuickServer
- Project window: 22 days
BACnet MS/TP to Modbus RTU Challenge
The upstream device was a Trane UC600 controller already communicating on BACnet MS/TP. The downstream requirement was a stable Modbus RTU presentation. That meant the project had to do more than pass traffic between two serial protocols. It had to define exactly how the BACnet-side data should be exposed to the downstream Modbus side.
A key challenge was clarifying the intended data flow early. The initial misunderstanding was not about whether the gateway could do the conversion. It was about which side should serve data and how the downstream system expected to consume it. Once that was clear, Chipkin could align the BACnet objects with a cleaner downstream Modbus register map.
The customer also needed documentation that would make commissioning easier. In projects like this, a usable and current point list matters almost as much as the gateway itself because it reduces the time spent second-guessing scaling, addressing, and point meaning in the field.
Why Chipkin
This was a strong fit for Chipkin because it combined a familiar protocol pair with a practical field need: make a Trane controller readable by a downstream Modbus RTU system and remove uncertainty from the handoff. Chipkin QuickServer provided the conversion platform, while Chipkin support helped the team validate the direction of data flow, reduce ambiguity in the points package, and deliver documentation the customer could actually use. Tools such as CAS BACnet Explorer also support faster validation when BACnet-side questions come up.
The Solution
Chipkin configured Chipkin QuickServer between the Trane UC600 and the downstream Modbus RTU network shown in the diagram above. The work centered on confirming the intended flow of data, preparing the configuration around the BACnet MS/TP source, and delivering a points package that was easier for the downstream team to understand and use.
Instead of leaving Hunton Group to sort out the translation details during startup, Chipkin helped package the integration into something easier to commission. That included organizing the point information so the downstream side was easier to interpret, easier to validate, and less dependent on field guesswork.
Trane UC600 Integration Results
The result was a successful BACnet MS/TP to Modbus RTU handoff for the Trane UC600 controller.
Before Chipkin, the project still needed the protocol direction clarified and a usable point definition for the downstream side. After Chipkin, Hunton Group had a configured QuickServer, less ambiguity around the mapping, and better-organized documentation that made commissioning easier.
Project proof points:
- 22-day delivery window from kickoff to completed configuration
- 5 support hours invested to gather requirements and prepare the solution
- 1 configuration revision needed to complete the job
- Better point documentation that reduced ambiguity and made customer setup easier
That last point mattered enough for the customer to say:
“The points list that you put together really made my job a lot easier.”
— BAS Technician, Hunton Group
Have a Similar BACnet-to-Modbus Project?
If you need to expose BACnet equipment to a Modbus network, Chipkin can help scope the point mapping, configure the gateway, and deliver a cleaner handoff for commissioning. Tell us about your project.