Messages

1

Support Questions / Re: Modbus RTU over TCP/IP question

« on: November 16, 2018, 03:43:28 PM »

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.

2

Support Questions / Re: Modbus RTU over TCP/IP question

« on: November 16, 2018, 01:05:46 AM »

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

3

Support Questions / Modbus RTU over TCP/IP question

« on: November 12, 2018, 05:06:09 AM »

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.