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+--- Thread: Question on Daikin DIII net protocol (/showthread.php?tid=2675)
Question on Daikin DIII net protocol - kevinzh - 04.06.2020
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
RE: Question on Daikin DIII net protocol - admin - 04.06.2020
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/showthread.php?tid=2464&pid=15619#pid15619
RE: Question on Daikin DIII net protocol - kevinzh - 04.06.2020
(04.06.2020, 06:09)admin Wrote: 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/showthread.php?tid=2464&pid=15619#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
RE: Question on Daikin DIII net protocol - admin - 04.06.2020
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)RE: Question on Daikin DIII net protocol - kevinzh - 04.06.2020
(04.06.2020, 08:00)thank you very muchwhen i tried this, i got error message on scripting - cannot open User script: No such file or directory stack traceback: why is this happening? admin Wrote: 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)
RE: Question on Daikin DIII net protocol - admin - 04.06.2020
Which firmware version? Try saving the script again.
RE: Question on Daikin DIII net protocol - andrepneves@gmail.com - 28.12.2021
Hi!
Does anyone have the profile for Daikin DIII running properly? I'm trying to implement it but I'm having some trouble.
Thanks.
RE: Question on Daikin DIII net protocol - alexll - 23.03.2023
(28.12.2021, 05:21)andrepneves@gmail.com Wrote: 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!