The programming of programmable controllers and other sequential computing devices is facilitated by automatically generating an order for evaluating function blocks in a function block diagram and by automatically detecting any errors in a function block diagram which would adversely affect the generation...http://www.google.com.hk/patents/US6233703?utm_source=gb-gplus-share專利 US6233703 - Automatic generation of evaluation order for a function block diagram and detection of any associated errors
