Thank you for contacting.
May i know what is the firmware on the device you are using ?
Its recommended to use the latest .
Regarding your query.
May i know if you are trying to reach LAN device through RMS and ZT both ?
If you are facing adding the device on RMS i.e No IPs available . You can use manual option to create a LAN access for PLC.
I tested it on my side and was able to create.
Regarding the ZT LAN access for PLC.
Are you using the same network ID on both sides RUT and other PC?
I see that your ZT and PC IP pools are on 192.168.xx.xx , could you try to change your PC LAN IP to some other ?
For the PLC have you created a port forwarding rule ? What internal IP does this PLC have ? Does this PLC supports http(s) or SSH etc ?
Please let me know.