CoolMasterNet

Installation

1. 1Connect the CoolMasterNet or CoolLinkHub to the same local network as the ModbusCloud gateway (MCG or MLP series) using an Ethernet cable.
2. 2Ensure the CoolMasterNet or CoolLinkHub has Modbus TCP enabled and note its IP address and TCP port (default is 502).
3. 3If using a CoolLinkHub, verify that a CoolPlug module is installed on each indoor unit you want to control.
4. 4Import the CoolAutomation CoolMasterNet template from the ModbusCloud template library into your project.
5. 5Set the target IP address, TCP port, and Modbus unit ID in the ModbusCloud gateway configuration to match the CoolMasterNet or CoolLinkHub settings.
6. 6Send a test on/off command to VA1 and confirm the indoor unit responds before configuring the remaining units.

Things to watch for

01

Why can I not read current room temperature or unit status from this template?

All registers in this template are write-only. The CoolMasterNet exposes command registers that accept control values but do not return read-back data on the same addresses. Check the CoolMasterNet Modbus register documentation for separate read registers if available.

02

Why is the VA2 temperature setpoint missing from the template?

The register map provided for this template does not include a setpoint register for VA2. This is a limitation of the current register map, not a ModbusCloud restriction. Contact CoolAutomation support if you need the VA2 setpoint address.

03

The VA2 unit does not respond to on/off commands. What should I check?

Make sure you are using template version 1.0.2 or later. Earlier versions used an incorrect register address for VA2 on/off. The corrected address is register 35.

04

What baud rate or serial settings do I need for this template?

This template uses Modbus TCP, so serial settings like baud rate do not apply. Ensure the CoolMasterNet or CoolLinkHub and the ModbusCloud gateway are on the same IP subnet and that TCP port 502 (or your configured port) is not blocked by a firewall.

Registers (11)

0 read / 11 write

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