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+--- Thread: Modbus errors in the Log (/showthread.php?tid=954)
Modbus errors in the Log - GenaV - 23.08.2017
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)?
RE: Modbus errors in the Log - admin - 23.08.2017
Try increasing timeout value in device settings, you need to be running latest firmware.
RE: Modbus errors in the Log - GenaV - 24.08.2017
Hi!
Firmware latest, timeout setting was changed, result same - many timeout errors in the log.
Devices works perfectly.
RE: Modbus errors in the Log - admin - 24.08.2017
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.
RE: Modbus errors in the Log - GenaV - 28.08.2017
Hi!
Can I upload here json file (just 5 registers) and Modbus description of devices? Can you check json code for errors?
RE: Modbus errors in the Log - admin - 28.08.2017
Sure, no problem
RE: Modbus errors in the Log - GenaV - 29.08.2017
Hi,
Attachments here.
RE: Modbus errors in the Log - admin - 29.08.2017
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 }