Modbus errors in the Log

[GenaV]

Hello!

To LM4 connected 3 fancoil units (serial/chain connection). All 3 devices works perfectly: controlled independently, I see status of devices, temperatures and etc.
But i'm noticed in the log errors tab long list of errors, they appears each few second with message:

Fancoil_g (RTU slave 1) read failed: Operation timed out
Fancoil_k (RTU slave 2) read failed: Operation timed out
Fancoil_s (RTU slave 3) read failed: Operation timed out

Can you tell me the reason of these messages (taking in mind that devices works ok)?

[admin]

Try increasing timeout value in device settings, you need to be running latest firmware.

[GenaV]

Hi!

Firmware latest, timeout setting was changed, result same - many timeout errors in the log.
Devices works perfectly.

[admin]

Maybe you have mapped a coil/register which is not present in the device. By standard device must reply with an error response, but some simply ignore this so a timeout error occurs.

[GenaV]

Hi!

Can I upload here json file (just 5 registers) and Modbus description of devices? Can you check json code for errors?

[admin]

Sure, no problem

[GenaV]

Hi,

Attachments here.

[admin]

Set-point datatype should be int16, also value_multiplier should be set to 0.1. You can set bus_datatype to "bool" for on/off switch. Also, it looks like second profile addresses are incorrect, you can write addresses in hex like this, so they match the ones in the docs:

Code:

{ "name": "Summer_set-point_wr", "datatype": "uint16", "type": "register", "address": 0x102D, "writable": 1 }