SIBER - PASARELA RS485 - RF

Use cases

• Monitor indoor CO2 levels and humidity across multiple zones from a single cloud dashboard.
• Set ventilation speed remotely based on real-time air quality readings from Siber wireless sensors.
• Create alerts when CO2 concentration exceeds a threshold to ensure adequate ventilation in occupied spaces.
• Track filter status and receive a notification when the filter dirty flag is triggered, so maintenance can be scheduled.
• Log supply and exhaust temperatures over time to verify heat recovery performance of the ventilation system.
• Review error codes and defrost status remotely to diagnose ventilation issues without an on-site visit.

Installation

1. 1Wire the Siber Pasarela RS485-RF to the ModbusCloud gateway (MCG or MLP series) using a shielded two-wire RS485 cable, connecting A to A and B to B.
2. 2Set the Modbus slave address on the Pasarela to a unique value that does not conflict with other devices on the same bus.
3. 3Configure the ModbusCloud gateway serial port to 19200 baud, odd parity (1), and 8 data bits to match the Pasarela settings.
4. 4Ensure the compatible wireless devices (DFEVOPULS4B, DFEVOCTRL, DFEVOCO2, or DFEVOHR) are paired with the Pasarela according to the Siber pairing procedure.
5. 5Import the Siber Pasarela RS485-RF template in the ModbusCloud platform and assign it to the correct gateway and slave address.
6. 6Verify that live readings for temperature, CO2, humidity, and airflow appear on the ModbusCloud dashboard before completing the installation.

Things to watch for

01

Why am I not getting any response from the Pasarela on the Modbus bus?

Confirm that the baud rate is set to 19200 and parity is set to odd (1) on both the gateway and the Pasarela. Also verify that the RS485 A and B lines are not swapped.

02

Temperature and exhaust flow readings show incorrect or very large values. What is wrong?

These registers use float32 encoding across two consecutive addresses. Make sure the template is applied correctly, as manual register reads with a uint16 interpretation will produce meaningless values. Check the byte order (big-endian) matches the gateway configuration.

03

Can I connect multiple Pasarela devices on the same RS485 bus?

Yes, as long as each Pasarela has a unique Modbus slave address. Add a separate template instance in ModbusCloud for each device with the correct address.

04

The wireless sensors are paired but no data appears in the dashboard.

Verify that the wireless devices are within RF range of the Pasarela. Check the Siber pairing status indicator on the Pasarela. If sensors drop out intermittently, consider relocating the Pasarela to reduce wireless interference.

Registers (14)

14 read / 1 write

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