Modbus TCP problem - illegal data value

[deagle]

Hello,
I have Zabbix version:

# zabbix_server -V
zabbix_server (Zabbix) 6.0.15
Revision 287da69c170 31 March 2023, compilation time: Mar 31 2023 11:54:32

I need to add modbus TCP device to Zabbix.

When I using mbpoll, I get correct data:

# mbpoll -m tcp 10.10.11.110 -a 255 -t 4:float -r 2018 -1 -B
mbpoll 1.0-0 - FieldTalk(tm) Modbus(R) Master Simulator
Copyright © 2015-2019 Pascal JEAN, https://github.com/epsilonrt/mbpoll
This program comes with ABSOLUTELY NO WARRANTY.
This is free software, and you are welcome to redistribute it
under certain conditions; type 'mbpoll -w' for details.

Protocol configuration: Modbus TCP
Slave configuration...: address = [255]
                        start reference = 2018, count = 1
Communication.........: 10.10.11.110, port 502, t/o 1.00 s, poll rate 1000 ms
Data type.............: 32-bit float (big endian), output (holding) register table

-- Polling slave 255...
[2018]:         230

But if I try to do the same with Zabbix I get:

# zabbix_agent2 --test "modbus.get[tcp://10.10.11.110:502,255,3,2018,2,float,be,0]"
modbus.get[tcp://10.10.11.110:502,255,3,2018,2,float,be,0][m|ZBX_NOTSUPPORTED] [Unable to read: modbus: exception '3' (illegal data value), function '131']

Does anyone know what the issue is and how to fix it?

[deagle]

I did update Zabbix to version 6.0.16 but nothing changed.

[deagle]

Also tried with Zabbix version 6.4 but the result is the same.

[buoemis]

Escribe lo siguiente:

write this:

zabbix_agent2 --test "modbus.get[tcp://10.10.11.110:502,255,3,2018,2,,,0]"

[nczaw]

hi all anyone can fix this issue ?