IntesisBox DK-AC-MBS-1

Use cases

• Monitor room temperature setpoints and on/off states across multiple Daikin units on a single dashboard.
• Create an alert when the DK-AC-MBS-1 reports an alarm status or error code so you can respond before the customer calls.
• Adjust temperature setpoints and operating modes remotely to support seasonal commissioning or tenant requests.
• Log fan speed and vane position data over time to verify that scheduled comfort profiles are being followed.
• Verify correct operation of newly installed Daikin domestic units by checking live Modbus register values from your office.

Installation

1. 1Connect the IntesisBox DK-AC-MBS-1 to the Daikin indoor unit using the supplied connector cable, following the IntesisBox wiring diagram.
2. 2Wire the RS-485 (A/B) terminals of the DK-AC-MBS-1 to the RS-485 port on your ModbusCloud gateway (MCG or MLP series), observing correct polarity.
3. 3Set the Modbus slave address on the DK-AC-MBS-1 using its DIP switches or configuration tool, and note the address for the next step.
4. 4In the ModbusCloud platform, add a new device, select the IntesisBox DK-AC-MBS-1 template, and enter the matching slave address and baud rate (9600, 8N1).
5. 5Power on both devices and verify that register values such as on/off state and temperature setpoint appear on the ModbusCloud dashboard.

Things to watch for

01

What baud rate and serial settings should I use?

The default communication settings for the DK-AC-MBS-1 are 9600 bps, 8 data bits, no parity, 1 stop bit (9600 8N1). Make sure the ModbusCloud gateway port is configured identically.

02

Why does the temperature setpoint show an incorrect value?

The setpoint register at address 4 is a uint32 value that spans two consecutive 16-bit registers. The ModbusCloud template handles this automatically, but if you have customised the register map, ensure both registers are read together in the correct byte order.

03

Can I use this template with Daikin commercial or VRV units?

No. The DK-AC-MBS-1 is designed exclusively for the Daikin domestic air conditioning line. Intesis offers separate interfaces for Daikin commercial and VRV systems.

04

The gateway reads registers but cannot control the unit. What should I check?

Confirm that the DK-AC-MBS-1 is set to allow write access and that the Modbus function code used is correct (typically FC06 or FC16 for writing). Also verify that no other master on the RS-485 bus is conflicting.

Registers (13)

13 read / 11 write

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