Microprocessor based industrial motor control and protection using interrupt

The authors present a microprocessor based control scheme for an industrial motor with interrupt driven cause/effect protection. The scheme requests service from the microprocessor only under unhealthy conditions. The scheme also takes care of the causes as well as the effect of the fault. Under healthy conditions, the microprocessor generates the required control signals based upon the desired logic sequence. This arrangement increases the efficiency of the microprocessor, throughput of the system and also reduces the software complexity. The interrupt driven protection scheme allows the microprocessor to run other programs under normal operating conditions.<>