Daikin Modbus Interface profile

[KCWong]

Hello,

Do we have full set of Modbus profile (.json) for sL and Wiser for KNX? Here is the modbus register table attached and the draft json file for single machine (1-00).

Please help to correct me if I'm wrong and I haven't any equipment to test at this moment.

Thanks.

[PetrMares · Accepted solution]

Hello,

Instead of focus on specific product we have created Application note Daikin HVAC Systems via CoolMasterNet

CoolMasterNet (CMN) is compatible with following HVAC manufacturers (attachment), but we tested with Daikin because they provided samples for verification

AN is available here: https://www.se.com/ww/en/download/document/AN041_SL/

Out of CMN we do not have json profile with complete registers for device you have.

[KCWong]

Hi Petr,

Thanks for reply. Yes, we have use Coolmaster before with success. However, the Daikin people already sold their official Modbus interface to customer and arrived already. Also I found that there are different model no. with more or less functions selling in Taiwan, China, Japan, Malaysia & some European countries.... and their protocol(Modbus register) are all nearly the same.

[dgochev_newsyst]

Hi, 

do you have a comfurment Modbus profile for this Daikin gateway?

I have the problem to change operating mode through this device, so if you have somе working *json template I will be very grateful if you share it!

[KCWong]

Hi,

The change of the operation mode, fan speed, on/off need write a script to calculate final value by combining 3 objects together.

Unfortunately, I haven't finish the testing with Daikin on site. 

Sample Code:

onoff = grp.getvalue('1/1/1') -- fan on/off
direction = grp.getvalue('1/1/2') -- fan direction
speed = grp.getvalue('1/1/3') -- fan speed

value = bit.bor(
  onoff and 1 or 0,
  bit.lshift(bit.band(direction, 0x07), 8),
  bit.lshift(bit.band(speed, 0x07), 12)
)

grp.update('1/1/4', value)