Equipment - BACnet - York - York RTU BACnet Setup Guide
Table of Contents
Required configuration steps for York RTUs to ensure proper BACnet MS/TP communication and control with EMS platforms (ex: GPEC / GEM).
Baud Rate Policy Update (November 2026)
- New installations (GEM): All new GEM installations will be configured at 38400 baud by default.
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Troubleshooting on site: When a technician is on site troubleshooting offline devices or communication issues, the MS/TP network should be updated to 38400 baud as part of the corrective work.
- Every BACnet device should be set to the same baud rate, so if you update one BACnet unit due to communication issues, all should be updated at the unit and in GEM.
- It will be vital to check that the proper Baud Rate is used both at the device and in GEM to ensure BACnet units function as intended.
BACnet Configuration Steps
- Access the RTU controller via onboard display inside the unit
- Navigate to: MENU - COMMUNICATIONS - BAS / PROTOCOL
- Set Protocol to BACnet MS/TP
- Set Baud Rate to 19200 (or 38400)
- Assign unique MAC Address (recommended: 5–9 if controller is 4)
- Set BACnet Device Instance (must be unique across network)
- Save configuration and exit menu
- Power cycle unit
- Access onboard York controller again to verify settings were retained
MS/TP Wiring Requirements
- Use daisy chain protocol
- Maintain wiring polarity through whole trunk
- Install 120-ohm termination resistor at first and last device
- Ensure consistent baud rate across all devices (19200 or 38400)
- Avoid duplicate MAC addresses or Device IDs
Integration Notes (GPEC / GEM)
- Recommended addressing: GPEC = 4, RTUs = 5–9
- Use BACnet_2 (RS485 Port #2)
- Ensure MAC Address and Device ID match GEM configuration
- Avoid BACnet_3 unless manually configured
Common Issue
- Intermittent comms: verify baud rate, EOL resistors, and addressing