m340 password via API/TCP/SDK com

Adam1toR · ‎2023-03-12

hey,

I'm new to SE M340 PLC, I use Control Expert 15.2 IDE in order to program and also set password on the PLC.

Is there an API for Control Expert so I can open a project and connect to that project's PLC, send the password, and lock/unlock the PLC property?

Is there another way to communicate with the PLC via TCP/Modbus in order to lock/unlock it?

Is there a different IDE that has the mentioned above abilities and is compatible with SE M340?

cheers,

Adam

PatrickVanDijk · ‎2023-03-13

Hi Adam,

I'm not aware of any of the possibilities you mentioned. Most of them would defeat the security purpose anyway I guess.
For example: modbus is a non-encrypted, non-secure protocol. If passwords / PLCs could be unlocked through modbus, anyone on the network could do it after sniffing out previous modbus messages.

Can you explain what you are trying to restrict/block? Perhaps an industrial firewall with packet inspection capabilities (like Tofino for example) would do the trick?