What serial settings does the Primo Roasting Equipment Primo Xr require?

The Primo Roasting Equipment Primo Xr connects via Modbus RTU over RS-485 serial (9600 baud). Use a USB-to-RS-485 adapter, select the serial port for that adapter in Rostoc, and use the pre-filled baud rate, serial settings, and unit ID from the catalog.

Experimental Rostoc Compatibility with Primo Roasting Equipment Primo Xr

Experimentalby Primo Roasting Equipment

Does Rostoc support the Primo Roasting Equipment Primo Xr?

Rostoc lists experimental compatibility for the Primo Roasting Equipment Primo Xr via Modbus RTU over RS-485 serial (9600 baud). This Machine can be connected for real-time roast logging, Curve recording, and roast analysis. Confirm the setup before relying on it for production logging.

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Connection setup

The Primo Roasting Equipment Primo Xr connects to Rostoc via Modbus RTU over RS-485 serial (9600 baud).Connection: RS-485 Serial.

Setup steps

Connect a USB-to-RS-485 adapter to your computer, then connect the adapter to the machine RS-485 port or terminals.
Match the A/B or +/− wiring to the machine manual. If the adapter has ground, connect it only when the manual recommends it.
Install the adapter driver if your operating system requires it.
Open Rostoc and go to Settings → Machines.
Click + Add Machine and choose Browse Catalogue.
Find "Primo Roasting Equipment Primo Xr" in the catalog and click Add.
Back on the main screen, click Use for the Machine if needed, then choose the serial port assigned to the adapter. The baud rate, serial settings, and unit ID are pre-filled from the catalog.
Close other roasting software that may be using the same adapter.
Click Connect to start reading data.

Troubleshooting

Serial port not detected: Ensure the USB-to-RS-485 adapter driver is installed. Try a different USB port. On macOS, check System Information > USB.
No response from roaster: Verify the baud rate and parity settings match the roaster's configuration. Check RS-485 wiring polarity (A/B or +/−).
CRC errors in log: Reduce cable length or add a termination resistor. Ensure no other device shares the RS-485 bus.
Another app is open: Close other roasting software that may be using the same serial adapter before connecting in Rostoc.

Machine controls

Machine control not currently available

Rostoc has mapped controls for this Machine, but none are currently approved for live use.

Learn how availability, command results, and safety checks work in Machine controls.

Specifications

Roaster type	Drum
Heating	Unknown
Setup type	Modbus
Connection	RS-485 Serial (USB)

Data streams

When connected, Rostoc reads the following data from this machine:

Bean Tempfahrenheit