Modbus profiles examples

[Daniel]

Try first reading via Read test. If it works try using this
https://forum.logicmachine.net/showthrea...+generator

[tthamm]

Hello everyone,

does anybody have the profile for the energymeter from ABB (B24 112-100)?

I can´t get it to work. Thanky you!

[admin]

@tthamm, do you have the communication working via read test? The device documentation is very clear, you only have to convert addresses from hex to decimal for testing.

Try reading Active import with these settings:
- Function: Holding register (#3)
- Address: 20480
- Data type: uint64
- Read swap: Word
The read value is in 0.01KWh. If the value is incorrect then try using different read swap modes.

[Muetzli]

Hello,

here is a json profile for a "Keba P30x" charching station, which I tested with a charching station over a TCP/IP connection (IP, device-adress 255, port 502).
You must not activate the UDP connection on DWP 1.3 to use the TCP/IP connection!

After you read out the firmware version, you have to convert the received value from decimal to hex, for e.g. 50990336 -> 30A0D00 which means:
3 0A 0D 00 -> 3.10.14

To translate the "Product type and features" you have to translate the value in separate steps. So take a look at the manual at page 11.


Best regards,
Muetzli

[tthamm]

@tthamm, do you have the communication working via read test? The device documentation is very clear, you only have to convert addresses from hex to decimal for testing.

Try reading Active import with these settings:
- Function: Holding register (#3)
- Address: 20480
- Data type: uint64
- Read swap: Word
The read value is in 0.01KWh. If the value is incorrect then try using different read swap modes.

@admin, thank you. i always get a "Operation timed out". The Logicmachine have D0, D1 and C. The Abb have A, B, C, i connect D0 = A, D1 = B, C = 0V. Is this correct?

[admin]

LM does not have D0/D1 markings, but A/B/GND. A is positive, B is negative. Try swapping A/B lines and also check that the serial port settings match.

[gtsamis]

Hi,

I am trying to connect a Radiant Condesing Boiler to a LM via modbus.
I can read almost every value but i am stuck trying to control it.

Can someone help?

Attached the modus manual

  MODBUS_BRIDGE_INTF_PROTOCOL_L_00.pdf (Size: 628.07 KB / Downloads: 11)

Thank you in advance

[Daniel]

What is your profile?
PS. You should create separate thread for this.

[gtsamis]

What is your profile?
PS. You should create separate thread for this.

Hi Daniel,
Figure it out using bit mask.
Sorry for the of topic.

[Ian@GWTi]

Hi All,

Does anyone have a profile for ABB M4M 20 Meter?

M4M 20 MODBUS | ABB

I am currently working on profiles for:
Breathing Buildings NVHR
Condair Dehumidifer
Lindab HRU
RED Air Source Heat Pump
Daikin AC/VAM with RTS-Net modbus interface.

If anyone has profiles for these can you please post.  If not i will post when finished.

Many Thanks

[jmir]

Hi,

When using a profile and reading blocs of parameters, "read_count" refers to number of 16bit modbus registers or number of registers defined on "datatype"?

I mean if I use something like this:

{"name": "Input_Register_1",
"bus_datatype": "float32",
"type": "inputregister",
"datatype": "float32",
"address": 4,
"read_offset": 0,
"read_count": 4,
"writable": 0,
"value_delta": 1,
"value_multiplier": 1,
"units": "%"
},
{"name": "Input_Register_2",
"bus_datatype": "float32",
"type": "inputregister",
"datatype": "float32",
"address": 4,
"read_offset": 2,
"read_count": 4,
"writable": 0,
"value_delta": 1,
"value_multiplier": 1,
"units": "%"
}


Is this reading input register 4 as 32bit float and register 6 as 32bit float using a single modbus read command? (count is 4 because we're reading registers 4,5,6 and 7)

Or should I define read_count as 2 because I'm reading 2 32bit registers?

Thanks.

[admin]

Size is always 1 register (16 bits) no matter what the data type is. The system will read the required number of registers based on the data type chosen.

Block read is needed for certain devices that don't allow reading registers directly but only via a large block read. Block read can be useful in large projects since it speeds things up but usually values can be simply read one by one.

See this example on how it should be specified correctly: https://forum.logicmachine.net/showthrea...4#pid21834

[jmir]

Size is always 1 register (16 bits) no matter what the data type is. The system will read the required number of registers based on the data type chosen.

Block read is needed for certain devices that don't allow reading registers directly but only via a large block read. Block read can be useful in large projects since it speeds things up but usually values can be simply read one by one.

See this example on how it should be specified correctly: https://forum.logicmachine.net/showthrea...4#pid21834

Ok, thanks for your answer!!