Attached is the library for NJ and NX series Omorn plc if want to do Modbus TCP connections.
For some server platform , after configure the MOdbus TCP function block, its better to register related tags at the ethernet setting. Attached are the library and related manuals. Hope it helps.
MTCP_NJNX.slr
MTCP_Server_NJNX_E.pdf
MTCP_NJNX_Client_E (2).pdf