The pump does not answer on the bus.

The CIF module only uses the address, baud rate (parameter A) and frame (parameter C) set in the pump menu; Wilo sets no fixed default. Compare them with the master, for example 1, 9600 baud and 8N1 as in the Wilo basic setup. Swap A and B if nothing answers and make sure only one master is on the line.

Registers from 200 and up give an error or no value.

Duty point, heat meter values, temperatures and voltage need CIF module firmware 3.00 or later. Read input register 700: the high byte is the main version, so 512 means 2.00. With older firmware only registers 1 to 19 and 940 are available.

Why does the temperature show 330 instead of 57?

Wilo reports temperatures in kelvin with scale 0.1. A value of 330.0 K is 56.85 °C. Subtract 273.15 to get degrees Celsius. The template keeps the unit K so the stored value matches the Wilo document.

Pressure looks 10 times too high.

Wilo sends pressure in cm H2O with scale 10: a raw value of 50 means 500 cm H2O, about 0.49 bar. The template applies the scale but leaves the unit field empty, because cm H2O is not in the portal unit list. A value of 65535 means the pressure is not available.

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Modbus RTU

Wilo Stratos GIGA2.0

Name: Wilo Stratos GIGA2.0
Brand: Wilo
SKU: b8c209e6-9699-4b80-810d-0ca36364fca9

Wilo

Inline circulator: pressure, flow, power, energy, speed, error code and heat meter values over Modbus RTU (CIF module).

Overview

The Wilo Stratos GIGA2.0 is a high-efficiency inline pump for heating, cooling and air conditioning in larger buildings. With the Wilo CIF-Module Modbus RTU it reports its values over RS485. This template follows the Wilo functional description of the CIF-Module Modbus RTU and reads 18 input registers that Wilo lists for the Stratos GIGA2.0: pressure, flow, power, energy, speed, operation time, the Wilo error code, duty point and the heat meter values. The template uses the Wilo basic setup: address 1, 9600 baud, 8 data bits, no parity, 1 stop bit.

Key readings

Actual pressure and calculated flow
Electrical power input and energy consumption
Speed and operation time
Wilo error code with text
Active duty point
Heating and cooling power and energy
Flow and return temperature

Use cases

Get an alert when Error Code is not equal to 0 and see the Wilo text, such as dry running or blocked rotor, before you go on site.
Log Power Input and Energy Consumption per pump to compare circulation pumps and spot pumps that run at high load all night.
Compare Flow and Pressure with the design point to see whether a heating or cooling circuit is balanced.
Use Heating Energy Total and Cooling Energy Total from the heat meter function to report energy per circuit.
Track Operation Time to plan maintenance of the pump and its bearings.

Installation

1Fit the Wilo CIF-Module Modbus RTU in the pump and connect its RS485 terminals to the RS485 port of your ModbusCloud Gateway; switch on the termination in the module at the end of the line.
2In the pump menu set the Modbus address to 1, parameter A to 5 (9600 baud) and parameter C to 2 (8N1), or other values that match your bus.
3In ModbusCloud, add a Modbus device (RTU) with address 1, 9600 baud, 8 data bits, no parity and 1 stop bit, then import this template.
4Check the link: Power Input and Speed should show plausible values while the pump runs. If nothing answers, check address, baud rate and frame in the pump menu.

Things to watch for

The pump does not answer on the bus.: The CIF module only uses the address, baud rate (parameter A) and frame (parameter C) set in the pump menu; Wilo sets no fixed default. Compare them with the master, for example 1, 9600 baud and 8N1 as in the Wilo basic setup. Swap A and B if nothing answers and make sure only one master is on the line.
Registers from 200 and up give an error or no value.: Duty point, heat meter values, temperatures and voltage need CIF module firmware 3.00 or later. Read input register 700: the high byte is the main version, so 512 means 2.00. With older firmware only registers 1 to 19 and 940 are available.
Why does the temperature show 330 instead of 57?: Wilo reports temperatures in kelvin with scale 0.1. A value of 330.0 K is 56.85 °C. Subtract 273.15 to get degrees Celsius. The template keeps the unit K so the stored value matches the Wilo document.
Pressure looks 10 times too high.: Wilo sends pressure in cm H2O with scale 10: a raw value of 50 means 500 cm H2O, about 0.49 bar. The template applies the scale but leaves the unit field empty, because cm H2O is not in the portal unit list. A value of 65535 means the pressure is not available.

Registers (18)

18 read / 0 write

Name	Address	Function	Type	Unit	Access
Pressure Actual pump pressure in cm H2O (raw value x 10), differential or absolute depending on the sensor, calculated on sensorless operation. 65535 = error. Wilo name pressure.	•••	•••	•••		R
Flow Calculated flow in m³/h (raw x 0.1), 0 to 9998, 9999 = error. Not for closed external control loops. Wilo name flow.	•••	•••	•••	m³/h	R
Energy Consumption Electrical energy consumed by the pump in kWh, 65535 = error. Wilo name energyConsumption.	•••	•••	•••	kWh	R
Power Input Electrical input power in W, 65535 = error. Wilo name powerInput.	•••	•••	•••	W	R
Operation Time Total running time of the master pump with the motor turning, in h (raw x 10). 65535 = error. Wilo name operationTime.	•••	•••	•••	h	R
Speed Rotational speed of the master pump in 1/min, 32767 = error. Wilo name speed.	•••	•••	•••	rpm	R
Maximum Speed Highest speed value the pump reports reliably, in 1/min. Wilo name speed max-pres-value.	•••	•••	•••	rpm	R
Minimum Speed Lowest speed value the pump reports reliably, in 1/min. Wilo name speed min-pres-value.	•••	•••	•••	rpm	R
Error Code Current Wilo warning or error code of the master pump (E000 to E255, as in the pump manual), 0 = no error. Wilo name warning/errorMessage.	•••	•••	•••		R
User Trouble Code Error code as shown on the pump display, 0 = no error. Needs CIF module firmware 3.00 or later. Wilo name userTroubleCode.	•••	•••	•••		R
Duty Point Active relative duty point in % (raw x 0.5); the range is not necessarily 0 to 100 % and 0 % does not mean off. CIF firmware 3.00 or later. Wilo name dutyPointRel.	•••	•••	•••	%	R
Heating Power Heating power in the measured hydronic circuit (heat meter function), REAL in W. CIF firmware 3.00 or later. Wilo name powerHeating.	•••	•••	•••	W	R
Cooling Power Refrigeration power in the measured hydronic circuit, REAL in W. CIF firmware 3.00 or later. Wilo name powerRefrigeration.	•••	•••	•••	W	R
Heating Energy Total Total heating energy in the measured hydronic circuit, REAL in kWh. CIF firmware 3.00 or later. Wilo name energyHeat.Total.	•••	•••	•••	kWh	R
Cooling Energy Total Total refrigeration energy in the measured hydronic circuit, REAL in kWh. CIF firmware 3.00 or later. Wilo name energyRefrig.Total.	•••	•••	•••	kWh	R
Flow Temperature Forward fluid temperature of the hydronic circuit in kelvin (raw x 0.1); subtract 273.15 for °C. CIF firmware 3.00 or later. Wilo name temperat.FluidFwd.	•••	•••	•••	K	R
Return Temperature Return fluid temperature of the hydronic circuit in kelvin (raw x 0.1); subtract 273.15 for °C. CIF firmware 3.00 or later. Wilo name temperat.FluidRet.	•••	•••	•••	K	R
Input Voltage Mains input voltage in V (raw x 0.1). CIF firmware 3.00 or later. Wilo name voltageInput.	•••	•••	•••	V	R

Loading registers…

Read the Wilo Stratos GIGA2.0 remotely

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