220v-240w电加热棒The programmable controller > > stepping sequence control programming teaching guidance
Abstract: the guidance of senior maintenance electricians preliminary master “rev. Stop the programming method of”, in the process of guiding the stepping sequence control programming, after groping summary, adopt the self-designed circuit, guide the students know the programming that is commonly used in soft components and their functions. Using practice and explain the method of combining the experience of the students there are both emotional and rational. To intersection traffic lights in the complete demo programming methods and steps, the purpose is to make students master as soon as possible the advanced stepping sequence control programming method.
Keywords: stepping sequence control programming, soft components and their functions, parking, sequence function diagram, programming steps
PLC in guidance of senior maintenance electricians stepping sequence control instructions in the process of programming, found a widespread difficulties of mood. This also no wonder, because the programmable controller in the bookstore programming classes of subjects, both tend to explain “rev. Stop the programming method of” bao. About stepping sequence control sections almost no programming method, is often used with introduction. For example, by using more selective sequence, usually have to wait to stop the program is running, (of course some process with such a request. In case of abnormal accident some can’t wait.) And abnormal shutdown state, the frequent the reboot process disorder. Actually stepping sequence control programming design is an advanced design method. It compared with “rev. Stop the programming method of” : its biggest characteristic is easy to read; Such as detailed guidance, on the basis of a mentor is easy to accept; At the same time of short design cycle, high efficiency. And some of the more complex automatic control, stepping sequence control programming method is often adopted. Therefore, senior maintenance electrician to master the programming method is particularly important. Himself in the process of guiding the stepping sequence control programming, and gradually explore summarizes some experience, the combination of “intersection traffic lights” by stepping sequence control programming examples, to talk about a guide the programming process.
A and guide the students know the stepping sequence control programming is commonly used in soft components and their functions
Stepping sequence control instruction programming is commonly used in soft components and instructions are: state element S, step contact STL instruction, setting instructions SET and reset RST, regional reset instructions ZRST, stepping back to RET, soft special auxiliary relay M8002, M8013 soft and other commonly used input