DAIKIN AZAI6WSCDKA Wireless Interface WiFi Adapter for Mini-Split System User Guide
- June 6, 2024
- Daikin
Table of Contents
DAIKIN AZAI6WSCDKA Wireless Interface WiFi Adapter for Mini-Split System
AZAI6WSCDKA AZAI6WSCDKB AZAI6WSPDKC
PRECAUTIONS AND ENVIRONMENTAL POLICY
PRECAUTIONS
For your security, and to protect the devices, follow these instructions:
- Do not manipulate the system with wet or damp hands.
- Disconnect the power supply before making any connections.
- Take care not to cause a short circuit in any of the system connections.
ENVIRONMENTAL POLICY
Do not dispose of this equipment in the household waste. Electrical and electronic equipment contain substances that may damage the environment if they are not handled appropriately. The symbol of a crossed-out waste bin indicates that electrical equipment should be collected separately from other urban waste. For correct environmental management, it must be taken to the collection centers provided for this purpose, at the end of its useful life.
The equipment components may be recycled. Act in accordance with current
regulations on environmental protection.
If you replace it with other equipment, you must return it to the distributor
or take it to a specialized collection center.
Those breaking the law or by-laws will be subject to such fines and measures
as are laid down in environmental protection legislation.
RS-485 COMMUNICATION PORT
RS-485, also known as EIA-485, is a communication standard in bus.
Integration bus
Speed of the communication port| from 300 to 115200bps
Communication| Half duplex
Frame length| 8-bit
Stop bit| 1-bit
Stream control| None
Parity| Even
CONNECTION
For proper operation of the system, verify that only the communication cables
(green-blue) are connected to their matching domotic buses. Attach the wires
with the terminal screws following the color code.
MODBUS PROTOCOL
MODBUS Protocol is a communication structure used to establish master-slave
/client-server communication between intelligent devices connected on
different types of buses or networks.
Each device intended to communicate using Modbus is given a unique address.
Master devices send a command in a frame which contains the address of the
device or the end-devices (slaves). All devices are sent the frame, but only
the recipient interprets and executes the command. Modbus commands contain
checksum information, to allow the recipient to detect transmission errors.
Note: It possible to send information to multiple devices simultaneously
using a frame called “Broadcast”.
Each message includes redundant information that ensures it is properly
received. If, after a certain time, the master does not receive a confirmation
it interprets that an error has occurred and terminates communication.
The mode of transmission used is MODBUS-RTU. Each byte of data is represented
by two 4-bit characters in hexadecimal format. The format of the frame is the
following:
| Start | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | Parity | Stop |
|---|
DKN WI-FI CONTROLLER
The DKN is a Modbus slave device, so it is necessary to indicate its address.
To do this, associate your DKN via the “DKN NA” app (available for iOS and
Android) by following these steps:
-
On the drop-down menu press the option Add device.
-
Select the unit from the list of available units to get info.
Note: If your unit does not appear, confirm the Bluetooth function of your iOS or Android is activated. Verify that the DKN is working properly. -
Enter the pin code located in the DKN if required and tap Send button.
-
Enter the Communication protocol > Modbus (slave address) to with you want to point within Webserver Information.
MODBUS FUNCTION CODES
Modbus basic commands allow the control of a device to change the value of its registers (memory slot) or to request the content of these registers, depending on the codes:
| Code | Function: |
|---|---|
| 03 | Read holding registers |
| 04 | Read input registers |
| 06 | Preset/write single holding register |
| 16 | Preset/write multiple holding registers |
- Slave address Defines the system to access. A Modbus command contains the Modbus address of the device it is intended for (1 to 247). 0 address is reserved for a transmission to all devices (broadcast).
- Operation code. Specifies the operation to be performed.
- Register address. Specifies the operation to be accessed. In commands to be performed in multiple registers, defines the boot log, from which you want to operate consecutively.
- Data. Formed by 2 bytes (simple operations) or a set of 2 bytes (multiple operations) that contain the information in the command.
- CRC. Two bytes are added to the end of the stream in order to detect transmission o reception errors. This action is done using the Cyclic Redundant Code.
- Generator polynomial: CRC-16 = x16 + x15 + x2 + 1.
WRITE COMMANDS
Write a single holding register
| Byte | Field |
|---|---|
| 0 | Address of the slave (1-247) (0: Broadcast) |
| 1 | Write single register (6) |
| 2 | Register address |
3
4| Data to be written
5
6| CRC
7
The response, as long as there is no error type, must be exactly the same format as the write command.
Write multiple registers
| Byte | Field |
|---|---|
| 0 | Address of the slave (1-247) (0: Broadcast) |
| 1 | Write multiple register (16) |
| 2 | Starting register address |
| 3 | Number of registers to be written (N) |
4
5| Total number of bytes of write data (2·N)
6| Data to be written in register 1
7
…
5+2·N| Data to be written in register N
6+2·N
7+2·N| CRC
8+2·N
The response, as long as it is error-free, will be:
| Byte | Field |
|---|---|
| 0 | Address of the slave (1-247) (0: Broadcast) |
| 1 | Write multiple registers (16) |
| 2 | Starting register address |
3
4| Number of registers to be written (N)
5
6| CRC
7
READ COMMAND
Question
| Byte | Field |
|---|---|
| 0 | Address of the slave (1-247) (0: Broadcast) |
| 1 | Reading records (3/4) |
| 2 | Starting register address |
3
4| Number of registers to be read (N)
5
6| CRC
7
Response
| Byte | Field |
|---|---|
| 0 | Slave address (1-247) (0: Broadcast) |
| 1 | Read holding registers (3/4) |
| 2 | Number of response bytes (2·N) |
| 3 | Data to be read in register 0 |
4
…
3+2·N| Data to be read in register N
4+2·N
5+2·N| CRC
6+2·N
REGISTERS
SYSTEM REGISTERS
Register address
(decimal)
| Description| Values| Operations| DKA| DKB| DKC
---|---|---|---|---|---|---
P1P2| S21
0
| On/Off: The DKN Plus Interface will report the status. Using the Building
management system, any indoor unit may be configured as on/off. These are Read/Write objects.
| 0 : Off
1 : On
| 0x03, 0x04,
0x06, 0x10,
0x16
| ·| ·| ·| ·
1
| Setpoint*:The indoor unit setpoint, and this value is reported to the
Building management system and can be changed from it. These are Read/ Write objects.
| Setpoint x 10
Example: 22.5 ºC
: 225
| 0x03, 0x04,
0x06, 0x10,
0x16
| ·| ·| ·| ·
2
| Room temperature (Localtemp)**: The Building management system can
obtain the actual room temperature. These are read only
objects.
| Localtemp x 10
Example: 22.5 ºC
is 225
|
0x03, 0x04
| ·| ·| ·| ·
3
|
Modes: The DKN Plus Interface will report the operation mode of the indoor unit, represented by a number. These are Read/Write objects.
| 1 : Auto
2 : Cooling
3 : Heating,
4 : Fan
5 : Dry
|
0x03, 0x04,
0x06, 0x10,
0x16
| ·| ·| ·| ·
4
| Speeds: This parameter refers to the IU fan speed. Depending on the value
selected, the IU fan will run at a given speed, and the step at which the fan is running is reported to the BMS platform. This is read only object.
| 0-100%
0: Automatic
| 0x03, 0x04,
0x06, 0x10,
0x16
| ·| ·| ·| ·
5
|
Louvers Vertical: The DKN Plus Interface will report the position of the unit louvers represented by a number. These are Read/Write objects.
| 0 – 7 : Louvers
position 8 : Auto
9 : Swing
10 : Swirl
|
0x03, 0x04,
0x06, 0x10,
0x16
| ·| ·| ·| ·
7| Unit Error Code 1: If the indoor unit generates an error, it will be
reported by the DKN Plus Interface to the BMS platform. This is Read only
object.| Ascii value:
Example: ‘C4’
| 0x03, 0x04| ·| ·| ·| ·
8| Unit Error Code 2: If the indoor unit generates an error, it will be
reported by the DKN Plus Interface to the BMS platform. This is Read only
object.| Ascii value| 0x03, 0x04| ·| ·| ·| ·
14
|
Available Modes: The DKN Plus Interface will report the available modes. This is Read only object.
| Bit 0: Auto Mode
Bit 1: Cool Mode Bit 2: Heat Mode Bit 3: Vent. Mode Bit 4: Dry Mode
|
0x03, 0x04
| ·| ·| ·| ·
15
|
Available Speeds: The DKN Plus Interface will report the available speeds. This is Read only object.
| Bit 0: Auto
Bit 1: Super-Low
Bit 2: Low
Bit 3: Medium-Low
Bit 4: Medium
Bit 5: Medium-High
Bit 6: High
Bit 7: Super-High
|
0x03, 0x04
| ·| ·| ·| ·
16
|
Available Louvers: indica la posición de las lamas disponibles en la unidad. This is Read only object.
| Bit 0: Auto U/D
Bit 3: Swing U/D Bit 4: Swing L/R Bit 5: Swril
Bit 8-11: Vertical
positions (0-7)
Bit 12-15: Horiz.
Positions (0-7)
|
0x03, 0x04
| ·| ·| ·| ·
---|---|---|---|---|---|---|---
35| External Temp: The Building management system can obtain the external
temperature. These are read only objects.| Temperature x 10| 0x03, 0x04| | ·|
| ·
36| Return Temp: The Building management system can obtain the return
temperature. These are read only objects.| Temperature x 10| 0x03, 0x04| ·| ·|
·| ·
37| Liquid pipe Temperature: The Building management system can obtain the
exchange heat temperature of indoor unit. These are read only objects.|
Temperature x 10| 0x03, 0x04| ·| | ·|
38| Gas Pipe Temp Indoor Unit: The Building management system can obtain the
gas pipe temperature of indoor unit. These are read only objects.| Temperature
x 10| 0x03, 0x04| ·| | ·|
42| Position expansion valve Indoor Unit| Pulse units| 0x03, 0x04| ·| | ·|
53
| Work Temperature: The Building management system can obtain the work temperature for any zone. These are read only objects.| Temperature x 10
Example: 22.5 ºC
is 225
|
0x03, 0x04
| ·| ·| ·| ·
54
|
Speeds numeric
| 0,1,2,3….
0 : Auto
| 0x03, 0x04,
0x06, 0x10,
0x16
| ·| ·| ·| ·
55| Error value| Value of error
Example: 0x24
| 0x03, 0x04| ·| ·| ·| ·
56
|
Modbus address
| Modbus slave address (Default 1)| 0x03, 0x04,
0x06, 0x10,
0x16
| ·| ·| ·| ·
57
|
Config port baudrate
| 0: 100 bps
1: 300 bps
2: 500 bps
3: 1200 bps
4: 2400 bps
5: 4800 bps
6: 7800 bps
7: 9600 bps
8: 19200 bps (default)
9: 57600 bps
10: 115200 bps
|
0x03, 0x04,
0x06, 0x10,
0x16
|
·
|
·
|
·
|
·
58
|
Config port parity
| 0: None
1: Odd
2: Even (default)
| 0x03, 0x04,
0x06, 0x10,
0x16
| ·| ·| ·| ·
59| Heater status.
Monitor the Aux heater status (digital output contact).
| 0: Deactivated
1: Activated
| 0x03,0x04| | | ·| ·
60| Digital Input status. Monitor the digital input operation status| 0:
Deactivated
1: Activated
| 0x03,0x04| | | ·| ·
Notes:
(*) Maximum/Minimum limits depend on your A/C unit. (**) Should be greater
than 0.