Question on Daikin DIII net protocol

[kevinzh]

Hi there
I'm using Daikin Modbus module (DTA116A621) with LM3 for home AC control. 
The profile provided by the engineer is as below: 

{
  "manufacturer": "Embedded Systems",
  "description": "DAIKN-DTA116A621",
  "mapping": [ 
 
    { "name": "on_off_status_00",  "bus_datatype": "bool",    "type": "inputregister",  "address": 2000,  "value_bitmask":0x0001},
    { "name": "set_temp_status_00", "bus_datatype": "float16",  "type": "inputregister",  "address": 2002,  "value_multiplier": 0.1,  "units": "C"  },
    { "name": "act_temp_status_00", "bus_datatype": "float16",  "type": "inputregister",  "address": 2004,  "value_multiplier": 0.1,  "units": "C"  },
    { "name": "on_off_00",          "bus_datatype": "bool",    "type": "register", "writable": 1, "write_only": true,  "value_base": -4352,  "value_multiplier": 1,    "address": 2000},
    { "name": "set_fan_00",        "bus_datatype": "uint8",    "type": "register", "writable": 1, "write_only": true, "value_base": 0.45684814453125, "value_multiplier": 0.0001220703125, "address": 2000},
    { "name": "set_mode_00",        "bus_datatype": "uint8",    "type": "register", "writable": 1, "write_only": true, "address": 2001 },
    { "name": "set_temp_00",        "bus_datatype": "float16",  "type": "register", "writable": 1, "write_only": true, "value_multiplier": 0.1, "address": 2002, "units": "C"},
......

in reality the fan-speed control does not work properly - it does not change in consistence with the setup on user interface (ABB wall-mount sensor control), and in certain speed settings (esp at low speed) the fan makes troubling noises

just wondering how the value-base and value-multiplier are calculated and chosen in this case, and how i can make changes to make the setup work right.
i also attached Daikin's protocol below

thanks in advance

Wang

[admin]

You forgot to attach a file.
The profile won't work correctly because a single register controls several different values. You will need a script similar to this to combine object values into a single register value:
https://forum.logicmachine.net/showthrea...9#pid15619

[kevinzh]

You forgot to attach a file.
The profile won't work correctly because a single register controls several different values. You will need a script similar to this to combine object values into a single register value:
https://forum.logicmachine.net/showthrea...9#pid15619

sorry here is the attachment.

I looked at the script - does it mean i need to read out the value from the input register and then write it back to the holding register? 

how should i embed the script into the project? - sorry i'm not very skillful at this.
thanks again

[admin]

You need to modify the profile to allow raw value to be written to the control register.

Code:

{ "name": "on_off_status_00", "bus_datatype": "bool", "type": "inputregister", "address": 2000, "value_bitmask": 0x0001},
{ "name": "set_temp_status_00", "bus_datatype": "float16", "type": "inputregister", "address": 2002, "value_multiplier": 0.1, "units": "C" },
{ "name": "act_temp_status_00", "bus_datatype": "float16", "type": "inputregister", "address": 2004, "value_multiplier": 0.1, "units": "C" },
{ "name": "control_00", "bus_datatype": "uint16", "type": "register", "writable": 1, "write_only": true, "address": 2000 },
{ "name": "set_mode_00", "bus_datatype": "uint8", "type": "register", "writable": 1, "write_only": true, "address": 2001 },
{ "name": "set_temp_00", "bus_datatype": "float16", "type": "register", "writable": 1, "write_only": true, "value_multiplier": 0.1, "address": 2002, "units": "C"},

You will also need 3 objects: on/off (bool), fan direction (1 byte unsigned), fan volume (either bool or 1 byte unsigned depending on 2 or 3 step fan)
All objects must have the same tag assigned to them, then you need to create an event script attached to this tag.

Change group addresses as needed, 1/1/4 is the group that is mapped to control register of ModBus device.

Code:

onoff = grp.getvalue('1/1/1') and 1 or 0
direction = grp.getvalue('1/1/2')
volume = grp.getvalue('1/1/3')

if direction > 7 or direction == 5 then
  direction = 6
end

if type(volume) == 'boolean' then
  volume = volume and 1 or 5
elseif volume ~= 1 and volume ~= 3 and volume ~= 5 then
  volume = 1
end

value = bit.bor(
  onoff,
  bit.lshift(6, 4),
  bit.lshift(direction, 8),
  bit.lshift(volume, 12)
)

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

[kevinzh]

You need to modify the profile to allow raw value to be written to the control register.

Code:

{ "name": "on_off_status_00", "bus_datatype": "bool", "type": "inputregister", "address": 2000, "value_bitmask": 0x0001},
{ "name": "set_temp_status_00", "bus_datatype": "float16", "type": "inputregister", "address": 2002, "value_multiplier": 0.1, "units": "C" },
{ "name": "act_temp_status_00", "bus_datatype": "float16", "type": "inputregister", "address": 2004, "value_multiplier": 0.1, "units": "C" },
{ "name": "control_00", "bus_datatype": "uint16", "type": "register", "writable": 1, "write_only": true, "address": 2000 },
{ "name": "set_mode_00", "bus_datatype": "uint8", "type": "register", "writable": 1, "write_only": true, "address": 2001 },
{ "name": "set_temp_00", "bus_datatype": "float16", "type": "register", "writable": 1, "write_only": true, "value_multiplier": 0.1, "address": 2002, "units": "C"},

You will also need 3 objects: on/off (bool), fan direction (1 byte unsigned), fan volume (either bool or 1 byte unsigned depending on 2 or 3 step fan)
All objects must have the same tag assigned to them, then you need to create an event script attached to this tag.

Change group addresses as needed, 1/1/4 is the group that is mapped to control register of ModBus device.

Code:

onoff = grp.getvalue('1/1/1') and 1 or 0
direction = grp.getvalue('1/1/2')
volume = grp.getvalue('1/1/3')

if direction > 7 or direction == 5 then
  direction = 6
end

if type(volume) == 'boolean' then
  volume = volume and 1 or 5
elseif volume ~= 1 and volume ~= 3 and volume ~= 5 then
  volume = 1
end

value = bit.bor(
  onoff,
  bit.lshift(6, 4),
  bit.lshift(direction, 8),
  bit.lshift(volume, 12)
)

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

[admin]

Which firmware version? Try saving the script again.

[andrepneves@gmail.com]

Hi!

Does anyone have the profile for Daikin DIII running properly? I'm trying to implement it but I'm having some trouble.

Thanks.

[alexll]

Hi!

Does anyone have the profile for Daikin DIII running properly? I'm trying to implement it but I'm having some trouble.

Thanks.

Same case here. I need to control 61 devices with this DIII - Modbus RTU gateway: Modbus Interface DIII EKMBDXB7V1 

Is there any progress on this? Thank you!