ATDriver ServerV2.3 is a realtime driver server that contains modbus RTU, modbus TCP/IP, S7 Ethernet Client/Server communication protocols.
ATDriver Server works on plug and play mechanism for driver plugins . It’s a realtime server that can supply realtime data for ATSCADA apps.
This is a free license product of ATSCADA Lab. So you can use it freely for communicating with modbus RTU, modbus TCP/IP slaves, S7 PLCs and S7 HMIs PC/PGs.
You can download and use it freely by clicking this LINK.