et200sp modbus rtu Communication and Network structure

[marcinmrag 1]

Hello Experts!

Someone has expirience with et200sp modbus rtu? I would like to connect weight scale which has only Modbus RTU interface communication. I would like to connect two scales. My question is...I need two modbus modules? How to connect this to et200Sp CPU conntroller.

[gclshortt 51]

https://support.industry.siemens.com/tf/WW/en/posts/modbus-connection-between-et-200sp-and-third-party-devices/130771?page=0&pageSize=10

https://support.industry.siemens.com/tf/WW/en/posts/et200sp-cpu-modbus-rtu/155698?page=0&pageSize=10

Your connection media will be Serial RS485. The above links should help you out.
Regards,
Garry

[marcinmrag 1]

Ok from the software site is pretty clear. My question is how to connect this physically. I have no experience with Modbus RTU Network, Profibus and etc. Always i use EthernetIP or Profinet. This what i know necessary is to buy extra modul for ET 200Sp. I can connect two devices to one module? I guess that i can connect one device to module than from fist device to second. Could you explain me this in easy way please :)

I found this example in the Internet . Could you confirm that is right?

Edited 13 Jul 2018 by marcinmrag