Modbus Split Air Conditioning Gateway Product Manual

1. Product Introduction:

Split type air conditionerOne to one air conditionerSystem, consisting of one external unit controlling one internal unit

The product is a gateway for controlling split air conditioners. Installed on the signal terminals corresponding to each internal unit.

1.1 Product Overview (divided into two models due to different air conditioning brands)

1.2 Product Basic Specifications and Electrical Parameters

2, Installation requirements and wiring diagram

Installation conditions: Installed on indoor units

Maximum limit for internal and external devices: limited to installing one gateway per internal device.

Smart Home Integration Diagram

3. Product Display

The standard product is 485 Wireless product customization, customizable, providing relevant built-in modules.

Terminal and indicator light instructions are shown in the following figure:

3.1 Daikin split unit air duct control gateway—— ModelAFD11

1-3: The indicator lights are described in the following table:

4-6: The indicator light is described in the following table:

3.2(non Daikin) split unit air duct control gateway - modelAF11

1-3: Indicator lights are described in the following table:

4-6: Indicator light instructions are shown in the table below:

4. Ports corresponding to gateway and air conditioner internal unit

One to one split air conditioner internal unit and gateway docking ports are as follows (connection cable is standard for the product): Midea internal unit: five pin red socket

Haier internal unit: four pin red socket

5. Installation and Wiring Diagram (Taking Haier One to One Duct Fan as an Example)

6. Power on Test:

(1)Power on: After the gateway is connected to the internal unit, it supplies power to itself, and the signal light "5" lights up

(2) The 485 communication line is connected to the intelligent central control, and the signal light "6" lights up after communication

(3) If the central control host can monitor and control the air conditioning internal unit normally, the debugging is completed.

7. Gateway Address Dialing Method (Register Address),Gateway AssistanceAddress default "01 ”IRACC module dialing instance (code position 1-2-3-4-5-6)

1st slave dialing 000010:

2nd slave dialing 000100:

3rd slave dialing 000110:

IRACC Split machine gateway dialing address table:" 1 "indicates dialing up to ON

Modbus protocol

Monitoring
Operation/stop status of indoor unit
Operating modes: cooling, heating, air supply, dehumidification (depending on the performance of the indoor unit), set temperature
Set temperature of indoor unit
Indoor temperature, suction temperature of indoor unit
Airflow LL, · L, · M, · H, · HH - (depending on the performance of the indoor unit)
Forced stop status: Abnormal fault and warning codes for the forced stop of indoor units

control
Operation/Stop Control Indoor Unit Operation/Stop
Operating modes: cooling, heating, air supply, dehumidification (depending on the performance of the indoor unit), set temperature, and set temperature for cooling/heating
Airflow LL, · L, · M, · H, · HH - (depending on the performance of the indoor unit)

retrieve
System information communication status
How many indoor units are connected, and what is the network address of each indoor unit

Modbus communication parameters of gateway

485 communication parameters
Baud rate 9600bps Data bits 8 Stop bits 1 Parity check bits NONE

Function code:

This gateway supports the following functional codes. If this gateway receives a function code outside of this table, the function code will be considered illegal and this gateway will provide an abnormal response. Function code information broadcast
0x04 (04) Read Input Register
0x06 (06) Preset Single Register
0x10 (16) Preset Multiple Register

Function Format:
Read Input Register (0x04)

• [Function]
  Read the value from the input register.
  Please refer to "3. Modbus Register" for its address and input register content.
• [Search]

The query information lists the starting address of the register and the number of registers.

The starting address of register addressing is 0: the address of register 30001 is 0x0000.

This function can read up to 4 VRV indoor unit information in one query.
Preset single register (0x06)

• [Function]

Write a value to the hold register. In the case of broadcasting, this value is written into the hold register. Its address
Please refer to "3. Modbus Register" for the contents of the register.

• [Search]

The query information lists the starting address and a value of the register.

The address starting from 40001 in register addressing is 0x0000.
Preset multiple registers (0x10)

• [Function]

Write multiple values to the hold register. In the case of broadcasting, this value is written to the same for all slaves
The type is kept in the register. Please refer to "3. Modbus Register" for its address and local parameters in the hold register.

• [Search]

The query information lists the starting address, data size, and multiple values of the register. Register addressing starting address is 0:
The address of register 40001 is 0x0000. This function can write up to 1 VRV indoor in one query
Machine information.

Modbus Register

4.1 0x04 (04) Read Input Register (Input Register 3-1.)
4.2 Adapter Status Address

Example of adapter status:

Query 01 04 00 00 01 31 CA
Response 01 04 02 00 01 78 F0

Among them, query 01 04 00 00 01 31 CA
01 Slave Address 01~15
04 Function Code 04 Query

The address of register 30001 is 0x0000
00 01 Query 1 register
31 CA verification CRC16

Response 01 04 02 00 01 78 F0
01 Slave Address 01~15
04 Function Code 04 Query
02 Length

01 Adapter status 00: Not ready; 01: Get ready
78 F0 verification CRC16

Change the slave address as shown in Attachment 2

4.3 Indoor unit connection status:

Query 01 04 00 01 00 04 A0 09

Response 01 04 08 FF FF 3F FF 00 00 58 28

04 Function Code 04 Query

Response: 01 04 08 FF FF 3F FF 00 00 58 28

58 28 Verify CRC16

4.4 Status information of indoor unit

4.4.1 Adapter address According to the image content you provided, the following is the complete address mapping table for querying indoor unit status information:

Address mapping table for querying indoor unit status information

Instructions:

• Each indoor unit occupies 6 consecutive register addresses
• The address format is "group number serial number", for example, "1-00" represents the indoor unit number 00 of the first group
• Supports a total of 4 groups, each consisting of 16 indoor units, with a maximum support of 64 indoor units
• Use function code 0x04 to read these registers and obtain indoor unit status information

This table is used to query the operating status of indoor units, including switch status, wind speed, operating mode, set temperature, indoor temperature, fault codes, and other information.

4.4.2 Querying the status of indoor units:
Querying 01 04 07 D0 00 06 70 85
Responding 01 04 0C 50 00 42 02 01 18 00 01 0A 80 00 F6 FA

Among them, querying: 01 04 07 D0 00 06 70 85
01 Slave address 01~15
04 Function Code 04 Query
The address of the 07 D0 register 32001 is 0x07d0
00 06 Query 6 registers
70 85 verification CRC16

Six registers store the status of a hollow indoor unit.
Register 32001 (the starting address of the first indoor unit in the cavity is 0x07d0,
Register 32007 (the starting address of the second indoor unit in the cavity is 0x07d6,
Register 32013 (the starting address of the third indoor unit in the cavity is 0x07dc,
………

Response: 01 04 0C 50 00 42 02 01 18 00 00 01 0A 80 00 F6 FA
01 Slave Address 01~15
04 Function Code 04 Query
0C length
50 air volume/wind direction hh air volume=0x50&0xf0 10=1, 20=II, 30=m, 40=h, 50=hh, A0=automatic

swaying wind
This register BIT2-BIT0 bits are for wind direction 0-1-2-3-4-4-5-6-7 (0-horizontal direction, 4 vertical direction, 5 reserved for 6, 7 swing wind)
This register BIT3 indicates the automatic wind direction status of the indoor unit (0-OFF with no wind direction, 1-ON with wind direction)

00 switch off switch=0x00&0x01 1 1=On 0=Off 42 Filter cleaning flag
02 cooling mode=0x02&0x0f0=supply air, 1=heating, 2=cooling, 7=dehumidification
01 18 set temperature 28 set temperature=(0x01100+0x18)/10; 00 fault code attached 01 0A indoor temperature 26.6 indoor temperature=(0x01)100+0x0a)/10;
08 00 Temperature sensor status 0x0800 Normal 0x0001 Abnormal F6 FA verification CRC16

Querying the status of indoor units can be done by querying a single register or by querying multiple registers together.

4.5 0x06 (06) Preset Single Register

4.5.1. Adapter address

Address Content 40001 DIII Network Address

4.6 Control indoor unit:

4.6.1 Switch and Wind Speed Setting

Control 01 06 07 D0 10 60 84 AF
Response 01 06 07 D0 10 60 84 AF
Control example: 01 06 07 D0 10 60 84 AF
01 Slave Address 01~15

06 Function Code 06 Control

The address of register 42001 in 07D0 is 0x0740

10 (BIT7-BIT4) 10 wind speed 120 wind speed 130 wind speed m 40 wind speed h 50 wind speed hh A0=automatic
(BIT2-BIT0) (0-1-2-3-4-5-6-7) (0-horizontal direction, 4 vertical directions, 5 reserved, 7 swing wind)

60 shutdown 61 startup

Special reminder: FF 60 means no air volume control operation, only shutdown

FF 61 means no air volume control operation, only power on

20 FF air volume 1 without power on/off operation
50 FF air volume hh without power on/off operation
84 AF verification CRC16

4.6.2 Mode Setting

Control 01 06 07 D4 00 02 49 47
Response 01 06 07 D4 00 02 49 47
Control example: 01 06 07 D0 10 60 84 AF

00 A0 16 degrees Celsius
0B 52 Verify CRC16

01 Slave Address

4.6.3 Temperature Setting

Control 01 06 07 D2 00 A0 28 FF
Response 01 06 07 D2 00 A0 28 FF

Control example: 01 06 07 D2 00 A0 28 FF
01 Slave Address 01~15
06 Function Code 06 Control

07 D2 寄存器  42003 的地址是 0x07d2

00 A0 00 A0 16 摄氏度,00 AA 17 摄氏度,………
28 FF 校验 CRC16

Three registers store control information for an indoor air conditioning unit,

Register 42001 (the starting address of the first indoor unit of the air conditioner is 0x07d0,

Register 42004 (the starting address of the indoor unit of the second air conditioner is 0x07d3,

Register 42007 (the starting address of the third indoor unit of the air conditioner is 0x07d6,

4.7 0x10 (16) Preset: Multiple registers

Control indoor unit:

Control 01 10 07 D9 00 03 06 10 60 00 02 00 A0 0B 52
Response 01 10 07 D9 00 03 50 87

Control example: 01 10 07 D9 00 03 06 10 60 00 02 00 A0 C2 A5
01 Slave Address 01~15
10 Function Code 10 Control

07 D9 寄存器  42010 的地址是 0x07d9(第 4 台空调室内机)
00 03 预置  3 个寄存器
06 数据大小(bytes)
10 60 10 风速  11 60 关机
00 02 制冷模式

Response: 01 10 07 D9 00 03 50 87
01 Slave Address 01~15
10 Function Code 10 Control

07 D9 寄存器  42010 的地址是 0x07d9(第 4 台空调室内机)

00 03 Preset 3 registers
50 87 Verify CRC16
Preset multiple registers only support writing all control parameters to a single indoor unit at once!

4.8 Query Setting Air Conditioning Type

0X05 Query/Set Air Conditioning Model

Query: 01 05 00 00 CD CA

01 Slave Address
05 Function Code

00 00 Register Address Default 00 00
00 00 00 Fill Byte Default 00 00

CD CA Check CRC16

Return: 01 05 00 00 01 00 CC 5A
00 Slave Address
05 Function Code

00 00 Register Address Default 00 00
00 00 Air Conditioning Type. Please refer to the table below for details:

CC 5A Verify CRC16

Settings: 01 05 00 01 00 9D DA
01 Slave Address
05 Function Code

00 01 Register Address

01 00 Air Conditioning Type 01 00 Represents Daikin
9D DA Verify CRC16

Return: 01 05 00 01 00 9D DA
00 Slave Address
05 Function Code

00 01 Register Address

01 00 Air Conditioning Type. Please refer to the following table for details:

9D DA verification CRC16
5. Fresh air: both reading and control are 00

Attachment 1
Daikin exception code mapping table:

For example: Value 1=4 Value 2=9 Exception code=U4

Attachment 2

Attachment 3
Table: Type code correspondence table

The default factory address for slave devices is 01

Change the method to send 01 06 AA * * CRC16 device to the gateway. If the reply is consistent with the sending, it is considered successful

Example: 01 06 AA 03 DF 78

Change the slave address to 03