Intesis INMBSDAI001R000 User guide

Compatible with VRV and SKY line air conditioners commercialized by Daikin

USER MANUAL

Issue date: 10/2020 r3.8 ENGLISH

IntesisTM INMBSDAI001R000

User’s Manual r3.8 EN

This information is subject to change without notice

URL https://www.intesis.com

2 / 25

Important User Information

Disclaimer

The information in this document is for informational purposes only. Please inform HMS Industrial Networks of any inaccuracies or omissions found in this document. HMS Industrial Networks disclaims any responsibility or liability for any errors that may appear in this document.

HMS Industrial Networks reserves the right to modify its products in line with its policy of continuous product development. The information in this document shall therefore not be construed as a commitment on the part of HMS Industrial Networks and is subject to change without notice. HMS Industrial Networks makes no commitment to update or keep current the information in this document.

The data, examples and illustrations found in this document are included for illustrative purposes and are only intended to help improve understanding of the functionality and handling of the product. In view of the wide range of possible applications of the product, and because of the many variables and requirements associated with any particular implementation, HMS Industrial Networks cannot assume responsibility or liability for actual use based on the data, examples or illustrations included in this document nor for any damages incurred during installation of the product. Those responsible for the use of the product must acquire sufficient knowledge in order to ensure that the product is used correctly in their specific application and that the application meets all performance and safety requirements including any applicable laws, regulations, codes and standards. Further, HMS Industrial Networks will under no circumstances assume liability or responsibility for any problems that may arise as a result from the use of undocumented features or functional side effects found outside the documented scope of the product. The effects caused by any direct or indirect use of such aspects of the product are undefined and may include e.g. compatibility issues and stability issues.

IntesisTM INMBSDAI001R000

User’s Manual r3.8 EN

This information is subject to change without notice

URL https://www.intesis.com

3 / 25

Modbus RTU (EIA-485) Interface for Daikin air conditioners

Compatible with VRV and SKY line air conditioners commercialized by Daikin

ORDER CODE

LEGACY ORDER CODE

INMBSDAI001R000

DK-RC-MBS-1

IntesisTM INMBSDAI001R000

User’s Manual r3.8 EN

This information is subject to change without notice

URL https://www.intesis.com

4 / 25

INDEX

1. Presentation .......................................................................................................... 5

2. Connection ............................................................................................................ 6

2.1 Connect to the AC indoor unit ............................................................................... 6

2.2 Connection to the EIA-485 bus ............................................................................. 7

3. Quick Start Guide ................................................................................................... 7

4. Modbus Interface Specification ................................................................................ 8

4.1 Modbus physical layer.......................................................................................... 8

4.2 Modbus Registers ................................................................................................ 8

4.2.1 Control and status registers ........................................................................... 8

4.2.2 Configuration Registers................................................................................ 10

4.2.3 Considerations on Temperature Registers ...................................................... 11

4.3 DIP-switch Configuration Interface ...................................................................... 14

4.4 Implemented Functions ..................................................................................... 17

4.5 Device LED indicator ......................................................................................... 17

4.6 EIA-485 bus. Termination resistors and Fail-Safe Biasing mechanism ...................... 18

5. Electrical and Mechanical features .......................................................................... 19

6. List of supported AC Unit Types. ............................................................................ 20

7. Error Codes ......................................................................................................... 21

8. Annex 1: Master/Slave of Operation Mode ............................................................... 25

IntesisTM INMBSDAI001R000

User’s Manual r3.8 EN

This information is subject to change without notice

URL https://www.intesis.com

5 / 25

1. Presentation

The INMBSDAI001R000 interfaces allow a complete and natural integration of Daikin air conditioners into Modbus RTU (EIA-485) networks.

Compatible with all SKY Air and VRV models commercialized by Daikin. Check the Section 6 to obtain more information.

Reduced dimensions. 93 x 53 x 58 mm

3.7” x 2.1” x 2.3”

• Quick and easy installation.

Mountable on DIN rail, wall, or even inside the indoor unit on some models of AC.

• External power not required.

• Direct connection to Modbus RTU (EIA-485) networks. Up to 63 INMBSDAI001R000 devices

can be connected in the same network.

INMBSDAI001R000 is a Modbus slave device.

• Direct connection to the AC indoor unit. Up to 16 AC indoor units can be connected to

INMBSDAI001R000, controlling them as one (not individually).

• Configuration from both on-board DIP-switches and Modbus RTU.

• Total Control and Supervision.

• Real states of the AC unit's internal variables.

• Allows simultaneous use of the AC’s remote controls and Modbus RTU.

* Up to 63 Intesis devices can be installed in the same Modbus RTU bus. However, depending on the configured speed, the installation of

Modbus Repeaters may be required

• SCADA

• PLC

• DDC

• BMS

• HMI

• Controller

• etc

Up to 63

AC indoor units*

Modbus RTU

EIA-485 network

Modbus RTU

Master

device

INMBSDAI001R000

INMBSDAI001R000 INMBSDAI001R000

IntesisTM INMBSDAI001R000

User’s Manual r3.8 EN

This information is subject to change without notice

URL https://www.intesis.com

6 / 25

Connection to P1P2 bus. Two wire cable.

90 mm

3.5”

53 mm / 2.1”

90 mm

3.5”

53 mm / 2.1”

2. Connection

The interface comes with a plug-in terminal block of 2 poles to establish direct connection with the AC indoor unit. It comes as well with a plug-in terminal block of 2 poles to establish direct connection with the Modbus RTU EIA-485 network.

2.1 Connect to the AC indoor unit

The INMBSDAI001R000 connects directly to the Daikin P1P2 Bus, which is not provided within the interface. Depending on which controllers are available, the recommended connection’ methods are the following ones (details in Figure 2. 1):

• Wired remote control available. Connect the gateway as Slave in parallel with the wired

remote controllers (Controller acts as Master).

• Infrared remote control available. Connect the gateway as Master in parallel with the

infrared remote controller (Infrared Remote Control as Slave).

• No remote control available Connect the gateway directly to the P1P2 bus of the indoor

unit as Master when there is no Daikin Remote Controller.

Maximum P1 P2 bus length is 500 meters / 1,640.42 ft . The bus has no polarity sensitivity.

Important: If a wired remote controller of the AC manufacturer is connected in the same bus, communication may shut down.

Max. 500m / 1,640.42 ft

Figure 2. 1 INMBSDAI001R000 Connection diagrams

AC Indoor Unit

MODBUS

RTU

EIA-485

EIA485

A+ B-

P1 P2

AC Unit

For wall mounting extract the upper and lower staples until you hear the "click".

P1 P2

DAIKIN

Internal electronic control

Remote Controller

P2 P1

MODBUS RTU

EIA-485

Bus

EIA485

A+ B-

P1 P2

AC Unit

AC Indoor Unit

Internal electronic control

Connection to P1P2 bus. Two wire cable.

P2 P1

IntesisTM INMBSDAI001R000

User’s Manual r3.8 EN

This information is subject to change without notice

URL https://www.intesis.com

7 / 25

2.2 Connection to the EIA-485 bus

Connect the EIA-485 bus wires to the plug-in terminal block (the one of two poles) of INMBSDAI001R000 and keep the polarity on this connection (A+ and B-). Make sure that the maximum distance to the bus is 1,200 meters (3,937 ft). Loop or star typologies are not allowed in the case of the EIA-485 bus. A terminator resistor of 120Ω must be present at each end of the bus to avoid signal reflections. The bus needs a fail-safe biasing mechanism (see section 4.6 for more details).

3. Quick Start Guide

1. Disconnect the air conditioning from the Mains Power.

2. Attach the interface next to the AC indoor unit (wall mounting) following the instructions

of the diagram below or install it inside the AC indoor unit (respect the safety instructions given).

3. Connect the P1P2 bus between the interface and the AC indoor unit following the

instructions of the diagram. Screw each bare cable end in the corresponding P1P2 terminals of each device.

4. Connect the EIA-485 bus to the connector EIA485 of the interface.

5. Close the AC indoor unit.

6. Check the DIP-Switch configuration of the Intesis interface and make sure it matches the

current installation’s parameters (see section 4.3).

By default, the interface is set to:

▪ Modbus Slave Address ➔ 1 ▪ Modbus baud rate ➔ 9600 bps

These parameters can be modified from SW4 and SW3 DIP-Switches.

All other switch positions are set at low level (Off position ) by default.

NOTE: All changes on the DIP-Switch configuration require a system power cycle to be applied.

7. Connect the AC system to Mains Power.

IMPORTANT: The Intesis interface requires to be connected to the AC unit (powered) to start communicating.

SW3

SW4

IntesisTM INMBSDAI001R000

User’s Manual r3.8 EN

This information is subject to change without notice

URL https://www.intesis.com

8 / 25

4. Modbus Interface Specification

4.1 Modbus physical layer

INMBSDAI001R000 implements a Modbus RTU (Slave) interface, to be connected to an EIA-485 line. It performs 8N2 communication (8 data bits, no parity and 2 stop bit) with several available baud rates (2400 bps, 4800 bps, 9600 bps -default-, 19200 bps, 38400 bps, 57600 bps, 76800 bps and 115200 bps). It also supports 8N1 communication (8 data bits, no parity and 1 stop bit).

4.2 Modbus Registers

All registers are type “16-bit unsigned Holding Register” and they use the standard Modbus big endian notation.

4.2.1 Control and status registers

(protocol address)

(PLC address)

R/W

Description

R/W

AC unit On/Off

▪ 0: Off ▪ 1: On

R/W

AC unit Mode 1

▪ 0: Auto ▪ 1: Heat ▪ 2: Dry ▪ 3: Fan ▪ 4: Cool

R/W

AC unit Fan Speed 1

▪ 0: Auto ▪ 1: Low ▪ 2: Mid ▪ 3: High

R/W

AC unit Vane Position 1

▪ 1: Position-1 (Horizontal) ▪ 2: Position-2 (Horizontal) ▪ 3: Position-3 (Medium) ▪ 4: Position-4 (Vertical) ▪ 5: Position-5 (Vertical) ▪ 10: Swing

R/W

AC unit Temperature Setpoint

1,2,3

▪ -32768 (Initialization value) ▪ 16..31ºC (ºC/x10ºC) ▪ 61..92ºF

AC unit Temperature reference

1,2,3

▪ -32768 (Initialization value) ▪ 10..38ºC (ºC/x10ºC) ▪ 50..100ºF

Available values will depend on the AC unit mode. Check the AC unit model functions in its user manual to know the possible values for

this register.

Magnitude for this register can be adjusted to Celsius x 1ºC, Celsius x 10ºC (default) or Fahrenheit. See section 0 for more information.

It is not possible turn to x10 the value shown in Fahrenheit.

+ 17 hidden pages

Intesis INMBSDAI001R000 User guide

Specifications and Main Features

Frequently Asked Questions

User Manual