This demo OPC server is an OPC compliant, 32 bit, multi-threaded Windows based device driver, that provides connectivity to Modicon PLCs and Modbus Compatible Devices via Modbus RTU/ASCII Serial, Modbus Plus (SA-85, SA85-002, AT-984 Cards) networks, or TCP/IP Ethernet connections, in one OPC server product with no additional software licenses required! Supports Modicon x84,Modicon Quantum, Modicon Momentum, any other Modbus compatible device.