Priority logic module

摘要

In a nuclear process control system (100), a priority logic module (PLM) (200) is provided. The priority logic module (200) comprises a plurality of input ports (121a-d), each input port associated with one of a plurality of priorities, a plurality of output ports (161,166), and a test mode select port associated with a test mode select signal. The test mode select signal selects one of a normal mode or test mode, each mode being associated with matching signals received by the input ports (121a-d) to signals sent by the output ports (161,165). The priority logic module (200) further comprises a configurable priority logic circuit (210), wherein the priority logic circuit (210) maps one of the input ports (121a-d) to one of the output ports (161,165).