Universal Modbus TCP/RTU Slave

[rw_echo]

holdingregisters = registers, you need to use inputregisters instead.
mb.setfloat16precision(2) sets how float16 is converted to integer. By default it's 2 decimals (0.01 precision). Change 2 to 0 to convert to integer without any decimals.

I tried to change "registers" to "inputegisters", but it still doesn't work. I disabled and then re-enabled the resident script, but the address mapped by "inputegister" still doesn't work.

This is the changed code：

Code:

mb.setmapping({
  [7] = {
    coils = {
      [1] = '0/0/1',
      [2] = '0/0/2',
      [3] = '0/0/3',
    },
    registers = {
      [1] = '0/1/1',
      [2] = '0/1/2',
      [3] = '0/1/3',
    } ,
    inputregisters = {
      [1] = '0/1/4',
      [2] = '0/1/5',
    }
  }
})

In addition, I want to implement the knx address' 1/1/1 'to' 1/1/100 'to map the continuous list of registered addresses [0] to [100]. Now I need to write 100 mapping statements to implement it. Is there a fast implementation method?

[admin]

Check that the name is exactly inputregisters, you have the name misspelled twice in your post.

[Fahd]

holdingregisters = registers, you need to use inputregisters instead.
mb.setfloat16precision(2) sets how float16 is converted to integer. By default it's 2 decimals (0.01 precision). Change 2 to 0 to convert to integer without any decimals.

I tried to change "registers" to "inputegisters", but it still doesn't work. I disabled and then re-enabled the resident script, but the address mapped by "inputegister" still doesn't work.

This is the changed code：

Code:

mb.setmapping({
  [7] = {
    coils = {
      [1] = '0/0/1',
      [2] = '0/0/2',
      [3] = '0/0/3',
    },
    registers = {
      [1] = '0/1/1',
      [2] = '0/1/2',
      [3] = '0/1/3',
    } ,
    inputregisters = {
      [1] = '0/1/4',
      [2] = '0/1/5',
    }
  }
})

In addition, I want to implement the knx address' 1/1/1 'to' 1/1/100 'to map the continuous list of registered addresses [0] to [100]. Now I need to write 100 mapping statements to implement it. Is there a fast implementation method?

ChatGPT will be fast enough 

Code:

inputregisters = {
      [1] = '1/1/0',
      [2] = '1/1/1',
      [3] = '1/1/2',
      [4] = '1/1/3',
      [5] = '1/1/4',
      [6] = '1/1/5',
      [7] = '1/1/6',
      [8] = '1/1/7',
      [9] = '1/1/8',
      [10] = '1/1/9',
      [11] = '1/1/10',
      [12] = '1/1/11',
      [13] = '1/1/12',
      [14] = '1/1/13',
      [15] = '1/1/14',
      [16] = '1/1/15',
      [17] = '1/1/16',
      [18] = '1/1/17',
      [19] = '1/1/18',
      [20] = '1/1/19',
      [21] = '1/1/20',
      [22] = '1/1/21',
      [23] = '1/1/22',
      [24] = '1/1/23',
      [25] = '1/1/24',
      [26] = '1/1/25',
      [27] = '1/1/26',
      [28] = '1/1/27',
      [29] = '1/1/28',
      [30] = '1/1/29',
      [31] = '1/1/30',
      [32] = '1/1/31',
      [33] = '1/1/32',
      [34] = '1/1/33',
      [35] = '1/1/34',
      [36] = '1/1/35',
      [37] = '1/1/36',
      [38] = '1/1/37',
      [39] = '1/1/38',
      [40] = '1/1/39',
      [41] = '1/1/40',
      [42] = '1/1/41',
      [43] = '1/1/42',
      [44] = '1/1/43',
      [45] = '1/1/44',
      [46] = '1/1/45',
      [47] = '1/1/46',
      [48] = '1/1/47',
      [49] = '1/1/48',
      [50] = '1/1/49',
      [51] = '1/1/50',
      [52] = '1/1/51',
      [53] = '1/1/52',
      [54] = '1/1/53',
      [55] = '1/1/54',
      [56] = '1/1/55',
      [57] = '1/1/56',
      [58] = '1/1/57',
      [59] = '1/1/58',
      [60] = '1/1/59',
      [61] = '1/1/60',
      [62] = '1/1/61',
      [63] = '1/1/62',
      [64] = '1/1/63',
      [65] = '1/1/64',
      [66] = '1/1/65',
      [67] = '1/1/66',
      [68] = '1/1/67',
      [69] = '1/1/68',
      [70] = '1/1/69',
      [71] = '1/1/70',
      [72] = '1/1/71',
      [73] = '1/1/72',
      [74] = '1/1/73',
      [75] = '1/1/74',
      [76] = '1/1/75',
      [77] = '1/1/76',
      [78] = '1/1/77',
      [79] = '1/1/78',
      [80] = '1/1/79',
      [81] = '1/1/80',
      [82] = '1/1/81',
      [83] = '1/1/82',
      [84] = '1/1/83',
      [85] = '1/1/84',
      [86] = '1/1/85',
      [87] = '1/1/86',
      [88] = '1/1/87',
      [89] = '1/1/88',
      [90] = '1/1/89',
      [91] = '1/1/90',
      [92] = '1/1/91',
      [93] = '1/1/92',
      [94] = '1/1/93',
      [95] = '1/1/94',
      [96] = '1/1/95',
      [97] = '1/1/96',
      [98] = '1/1/97',
      [99] = '1/1/98',
      [100] = '1/1/99',
      [101] = '1/1/100',
}
    

[admin]

There was a bug with input registers in the library. Use updated code from the first post and restart the resident script afterwards.

[rw_echo]

Check that the name is exactly inputregisters, you have the name misspelled twice in your post.

I did make two errors in my post, but I checked that the "inputegisters" in the code were correct.

I saw that there is no relevant description of "inputegisters" in the user library 'mbtcp' script in Daniel's post. Is "user. mbtcp" missing the command statement of "inputegisters"?

[batistacaceres]

I have tried to connect one LogicMachine ModbusRTU as Slave, and another LogicMachine ModbusRTU as Master (using profiles), and it doesnt word, then
I have tested using one LogicMachine ModbusTCP as Slave, and another LogicMachine ModbusTCP as Master (using profiles), and it works, very well.
I have connected both Logicmachine using interface RS485-1 (A-A, B-B)
The code I am using is:

local mb = require('user.mbslave')
local mbrtu = require('luamodbus').rtu()

mbrtu:open('/dev/RS485-1', 115200, 'E', 8, 1, 'H')
mbrtu:connect()
mbrtuetslave(1) -- '*' handles multiple RTU slave IDs

mb.setmapping({
--[slave ID = 1]
[1] = {
coils = {
[0] = '32/0/13', -- On/Off Luces Dpto. Técnico
[1] = '32/0/113', -- Estado On/Off Luces Dpto. Técnico

},
registers = {
[0] = '32/2/24', -- Luminosidad Dpto. Técnico
[10] = '32/2/23', -- TConsigna AACC Dpto.Técnico
[11] = '32/2/123', -- Estado TConsigna AACC Dpto.Técnico
}
}
})

mb.setswap('w')
mb.setfloat16precision(2)

while true do
mb.rtuhandler(mbrtu)
end

Am I doing something wrong?, Anybody have tested it?

best regards

[Daniel]

Yes this script was fully tested, make sure you use correct interface and settings are same on master and slave.

[batistacaceres]

Yes this script was fully tested, make sure you use correct interface and settings are same on master and slave.

Hello admin:

Yes, I have used correct interface and settings are same on master and slave.

In error log, it show me the next: 

User library mbslave:432: attempt to call method 'send' (a nil value)
stack traceback:
User library mbslave:432: in function 'rtuhandler'


bestregards
Roger

[admin]

Install 2023 firmware release.

[batistacaceres]

Install 2023 firmware release.

yes, yes, yes, now it works....

thank you very much..
best regards

Roger

[pioneersteffen]

Hi LM Team,

Many thanks for suppling this scripts! They work perfectly.

One question:
- How can I define a register with a permanent INT16 value = 6? So don‘t use a group-address as source of the register.

Many thanks for your help!

Best Regards
Steffen

[admin]

Such feature is not implemented. You can simply use a virtual object for this.

[khalil]

Hello Dears,
Has any one integrate UPS NETMAN 204 TCP/IP .
Datasheet attached

[pioneersteffen]

Hi @all,

I want to connect a Kostal Smart Energy Meter to the universal Modbus Slave running on LM. Unfortunately I do not know right now what registers the Energy Meter expects to run correctly. Is there any possibility to log/which registers the Energy Meter is requesting/polling from universal Modbus Slave on LM?

Many thanks for your help!

Best regards
Steffen

[Erwin van der Zwart]

No, without documentation of registers and data type used by the devices it’s hardy possible and guessing what registers is used for what..

So you need this documentation …

[pioneersteffen]

Hi Erwin,

many thanks for the quick reply. I having a documentation what registers generally existing, but I don‘t know which one are getting polled. If I would know this I could make a match. Any ideas with this additional information?

Many thanks!

Best regards
Steffen

[Erwin van der Zwart]

That depends on your script or profile, there you set the registers that you want to read/write and is matching the registers described in your device document..

[Daniel]

Not the best thread to place this question as this is slave script topic where you need modbus profile. Please create separate Thread.

[djaval]

Hi! Please clarify how to change datatype of holdingregister from integer to float16 or 32?

Float temperature value by default is converted to integer x100. How to change it to float ?

   

[Daniel]

This is how it meant to work. You need to convert it back to float on master device.
mb.setfloat16precision(2) sets how float16 is converted to integer. By default it's 2 decimals (0.01 precision). Change 2 to 0 to convert to integer without any decimals.