Modbus RTU over TCP/IP question

[allansmac]

Hello guys,
I have a project using a controller that works with modbus rtu over tcp protocol, doing some research is basically, The Modbus TCP telegrams are the same as Modbus RTU except the checksum is omitted in Modbus TCP. Modbus RTU over TCP might be something not standard.
I have tested on modbus poll and can communicate.
But when I connect it to the advance hmi tcp ip driver It can't detect it.
Have you ever try o have any idea how I can solve this issue?
I appreciate any comments.
Thanks
Allan.

[Archie]

What controller do you have that communicates ModbusRTU over Ethernet?

[allansmac]

It is a Yotta PLC http://www.yottacontrol.com/a52.html. It is a powerfull controller but, the wifi port uses RTU over TCP.
Thank you

[bachphi]

What does this mean:

※ Support MODBUS Over TCP/IP, MODBUS Over UDP/IP
※ Support WPA2-PSK(AES)
※ Able to set for Wi-Fi to MODBUS 3-port Gateways


and do you have any price info?

[allansmac]

As far my understanding is.
1. Modbus RTU protocol message wrapped in a TCP package. Meaning that instead of ID is the IP and ask for CRC at the end of the message.
2.it's a wifi encryption.
3. It has three physical ports that uses RTU protocol.
4.  Around 89 dollars.

[Godra]

allansmac,

if you might still be interested, there is an experimental driver that might work for your setup:

https://www.advancedhmi.com/forum/index.php?topic=2536.0

If you did manage to resolve it on your own then don't hesitate to post your solution in the forum.