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+--- Thread: N30 - Modbus-TCP (/showthread.php?tid=9330)
N30 - Modbus-TCP - GWS - 05-14-2026
Hi,
I am trying to get the N30 to work as a modbus device that I can read from via TCP on port 502. Could not get it to work on the IP address of the N30
Hooked up a Hi-Flying EW11 TCP to modbus converter to the RS485 port in modbus mode and that does work. Can see all the registers for chips on address 100/200/300
I was assuming that the setting
TCP Server: enable
Protocol: Modbus
local port: 502
modbus local addr 1
Would be sufficient to read the registers via the N30 IP address on port 502
Whatever I try I do get a time-out
Port 502 is open if I test with ModbusDoctor or Powershell I get connected but no readings at the expected adresses.
Also tried with setting Modbus-RTU-v2 and a virtual COM port without any responce. Please provide instructions if this should work and if so how?
Thanks,
GWS
RE: N30 - Modbus-TCP - admin - 05-15-2026
you can read N30 by RS485 modbus protocol, not support TCP modbus by network.
RE: N30 - Modbus-TCP - GWS - 05-16-2026
If that is the case I don't understand what this setting is for (of Modbus does not work)
Looked to me like this was intended to make the N30 respond like a Modbus device. Is this only for communication with a modbus device?
Thanks,
GWS
RE: N30 - Modbus-TCP - admin - 05-16-2026
N series board not support TCP modbus, but we can update for it. in future will add TCP modbus.
RE: N30 - Modbus-TCP - admin - 05-23-2026
here is new firmware for N series board supoprt TCP modbus now.
1. Modbus_RTU_Protocol： serial modbus protocol use by RS485 "Modbus-RTU-v2"
2. Modbus_RTU_over_TCP_Protocol: tcp modbus rtu protocol，KCS webpapge protocol -- tcp server -- "Modbus-RTU-v2" option.
3. Modbus_TCP_Protocol: tcp standard modbus protocol，KCS webpage protocol -- tcp server "Modbus TCP" option.