Interfaces argoclima iM family HVAC systems via Modbus RTU for monitoring and remote management.
Overview
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.
Key readings
On/Off Status
Operating Mode
Setpoint
Power Consumption
Supply and Return Water Temp
ACS Water Inlet/Outlet Temp
Use cases
Monitor supply and return water temperatures on a live dashboard to verify heating or cooling performance.
Track power consumption of argoclima iM systems over time and generate energy reports for customers.
Create an alert when ACS water outlet temperature drops below the expected threshold for more than 15 minutes.
Log climatic curve setpoints alongside ambient temperature readings to validate system tuning remotely.
Compare water flow rates across multiple argoclima iM installations from a single cloud overview.
Detect operating mode changes and on/off events to analyse daily runtime patterns for maintenance planning.
Installation
1Connect the Argo iMODBUS interface to the argoclima iM unit following the manufacturer wiring instructions, then wire the RS-485 A, B, and GND terminals to your Modbus gateway.
2Set the Modbus slave address on the iMODBUS interface to a unique value that does not conflict with other devices on the same bus.
3Configure the Modbus gateway serial port to 115200 baud, matching the default baud rate of the iMODBUS interface.
4Ensure proper RS-485 bus termination at both ends of the cable run, especially given the high baud rate of 115200.
5Import the Argo iMODBUS template in the ModbusCloud portal and assign it to the correct gateway and slave address.
6Verify that all 14 registers return valid data on the ModbusCloud dashboard before finalizing the installation.
Things to watch for
01
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.
02
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.
03
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.
04
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.
Registers (14)
14 read / 0 write
Name
Address
Function
Type
Unit
Access
133 - On_Off
133
FC03
uint16
R
154 - Mode
0= Heating 1=Cooling
154
FC03
uint16
R
198 - Setpoint
198
FC03
uint16
°C
R
43 - Power Consumption
43
FC03
int16
kW
R
114 - Return Water Temp
114 - BDC temp retorno agua
114
FC03
uint16
°C
R
281 - ACS Water Inlet Temperature
281
FC03
uint16
°C
R
292 - ACS Water Outlet Temperature
292
FC03
uint16
°C
R
288 - ACS Water flow
288
FC03
uint16
l/min
R
194 - Maximum climatic curve setpoint
194
FC03
uint16
°C
R
195 - Minimum climatic curve setpoint
195
FC03
uint16
°C
R
196 - Ambient temperature below which setpoint is maximum
196
FC03
uint16
°C
R
197 - Ambient temperature below which setpoint is minimum
197
FC03
uint16
°C
R
121 - Water Flow
121
FC03
uint16
m³/h
R
115 - Supply Water Temperature
115
FC03
uint16
°C
R
Working with Modbus in your projects?
ModbusCloud is the hardware-plus-software platform that installers use to monitor, visualise and control Modbus devices from one portal. This template is one of hundreds you can use right away.
