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Modbus at CRP5

Thread #233 | 2019-03-21 12:48 UTC | Theodor K. | replies: 4
Post #1 | 2019-03-21 12:48 UTC | Theodor K.
Hi together,
can anyone help me with a modbus problem I have with CRP5?
I would like to read out the register 31001 (humidity value) and the length 2 registers (4 byte).
But the value I get is not the humidity value.
Post #2 | 2019-03-21 12:57 UTC | Guest
Hi Theodor,

To get the humidity value of the CRP5 please use the modbus address 31000 and not the modbus register address 31001.
Everytime the modbus address is equal modbus register address -1 for CRP5.
E. g.:
- humidity: 31000, length 2
- differential pressure: 31004, length 2
- serial number CRP5: 30000, length 2

See also Modbus manual https://www.rotronic.com/de-ch/productattachments/index/download?id=1084
chapter 2.1 - see Attention!
and
see chapter 2.4.5 Example: Read Input Register
Post #3 | 2024-05-09 10:47 UTC | Guest
See the instructions for use. Too good. Thank you!
bubble shooter

Post #4 | 2024-07-31 04:42 UTC | Guest
How I can return? The player is stumped, they can opt to skip or guess, unlocking more of the song heardle​
Post #5 | 2024-11-11 03:26 UTC | Guest
Werner Fürst wrote:
Hi Theodor,

To get the humidity value of the CRP5 please use the modbus address 31000 and not the modbus register address 31001.
Everytime the modbus address is equal modbus register address -1 for CRP5.
E. g.:
- humidity: 31000, length 2
- differential pressure: 31004, length 2
- serial number CRP5: 30000, length 2

See also Modbus manual https://www.rotronic.com/de-ch/productattachments/index/download?id=1084melon sandbox
chapter 2.1 - see Attention!
and Melon Sandbox is the excellent choice for individuals who seek to engage with characters
see chapter 2.4.5 Example: Read Input Register


I don't really understand the problem because if in the same case with another humidity value I wouldn't know what to do. However I just tried changing the modbus address as you said and it worked. Maybe I will research it more.

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