Public modbus RTU

[toshii]

Hi,

I have a challenge that I have to complete and I am unsure how to go about this. I am very new to networking and PLC stuff or any help would be much appreciated.

" you need to retrieve the numeric password for our file upload server from a register in one of our RTUs. You will need to send a modbus request that will read a 32 bit integer (high word first) from a holding register. The holding register is 40001 and the RTU can be found publicly at 101.xxx.xxx.xxx

Thanks

[Charles_Murison]

Hello @toshii 

Modbus is an open protocol that uses a poll and response structure. Your device would send a read request for the register defined and desired range (minimum 2). When the RTU responses the device needs to process the response. Not sure where you are string from and what you had done already. 

Regards,

Charles