Belimo 6-way EPIV V4 Modbus RTU

Use cases

• Monitor real-time volumetric flow and valve position on a live dashboard to verify hydronic balancing across zones.
• Create an alert when condensation protection activates so the installer can investigate cooling circuit conditions remotely.
• Log accumulated volume per zone over time to analyse energy consumption patterns for heating and cooling.
• Adjust maximum flow limits per sequence remotely to optimise comfort without a site visit.
• Switch between heating and cooling setpoints based on room demand and schedule from the cloud interface.
• Verify correct commissioning by comparing measured flow against design flow for each sequence after installation.

Installation

1. 1Wire the Belimo EPIV actuator RS-485 terminals (A, B, GND) to the corresponding terminals on the ModbusCloud gateway (MCG or MLP series).
2. 2Set the Modbus slave address on the actuator using the Belimo Assistant 2 app via NFC or through the on-device interface.
3. 3Confirm the baud rate is set to 38400 on both the actuator and the gateway serial port configuration.
4. 4Import the Belimo 6-way EPIV V4 template in the ModbusCloud platform and assign it to the correct gateway and serial port.
5. 5Select the desired flow unit (l/s, gpm, or l/h) in the unit selection registers to match your project requirements.
6. 6Power up the system and verify live data appears on the ModbusCloud dashboard before closing the installation.

Things to watch for

01

Why do I see zero or incorrect values for flow and accumulated volume registers?

These registers are uint32 values spanning two consecutive Modbus addresses. Make sure the template is correctly mapping both addresses. Also verify the byte order setting on the gateway matches the Belimo default (big-endian).

02

What baud rate should I use for the Belimo 6-way EPIV?

The default baud rate for this template is 38400. Both the actuator and the ModbusCloud gateway serial port must be configured to 38400 with matching parity and stop bit settings.

03

Can I mix multiple Belimo EPIV actuators on one RS-485 bus?

Yes. Each actuator must have a unique Modbus slave address. Use the Belimo Assistant 2 app to set the address on each device before connecting them to the shared bus.

04

How does condensation protection work through Modbus?

The actuator monitors relative humidity and flow body temperature internally. The template reads the condensation protection status register and allows you to adjust protection settings. Set up an alert in ModbusCloud to be notified when condensation risk is detected.

Registers (58)

32 read / 26 write

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