OPC Modbus Serial Server is an OPC-compliant 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/IPEthernet connections. It supports Modicon x84,Modicon Quantum, Modicon Momentum, any other Modbus compatible device.