Why am I getting communication timeouts with the Argo iMODBUS?

The iMODBUS runs at 115200 baud, which is unusually high for HVAC devices. Confirm your Modbus gateway supports this baud rate. Also check RS-485 wiring for correct polarity and proper termination resistors at both cable ends.

Can I change setpoints or switch the unit on/off through this template?

No. All 14 registers on the iMODBUS interface are read-only. The device filters incoming write requests to prevent system malfunctions. Control must be done locally or through the argoclima native controller.

What is the difference between the two water flow registers?

Register address 288 reports ACS water flow in litres per minute, while register address 121 reports water flow in cubic metres per hour. Both values represent flow measurements but in different units for flexibility in reporting.

Do I need to enable Modbus on the argoclima iM unit separately?

The iMODBUS is a standalone interface module that connects to the iM system. Refer to the argoclima installation manual for the iMODBUS to ensure it is properly linked to the iM unit before attempting Modbus communication.

Free Modbus template: Argo iMODBUS

The Argo iMODBUS is a Modbus RTU interface for argoclima iM family HVAC systems. This template reads operating parameters including on/off status, temperatures, water flow, power consumption, and setpoints across 14 read-only registers.

Name	Address	Function	Type	Unit	Access
133 - On_Off	•••	•••	•••		R
154 - Mode 0= Heating 1=Cooling	•••	•••	•••		R
198 - Setpoint	•••	•••	•••	°C	R
43 - Power Consumption	•••	•••	•••	kW	R
114 - Return Water Temp 114 - BDC temp retorno agua	•••	•••	•••	°C	R
281 - ACS Water Inlet Temperature	•••	•••	•••	°C	R
292 - ACS Water Outlet Temperature	•••	•••	•••	°C	R
288 - ACS Water flow	•••	•••	•••	l/min	R
194 - Maximum climatic curve setpoint	•••	•••	•••	°C	R
195 - Minimum climatic curve setpoint	•••	•••	•••	°C	R
196 - Ambient temperature below which setpoint is maximum	•••	•••	•••	°C	R
197 - Ambient temperature below which setpoint is minimum	•••	•••	•••	°C	R
121 - Water Flow	•••	•••	•••	m³/h	R
115 - Supply Water Temperature	•••	•••	•••	°C	R

Argo iMODBUS

Overview

Key readings

Use cases

Installation

Things to watch for

Registers (14)

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