Using PLC pilot machine tool now is increasing, the control that exercises PLC can simplify circuit, make a design more simple, safe, reliable. A few advanced PLC had all sorts of interface to be connected in order to come true machine, get online wait for a function. Make people OK and long-range control equipment. So, how can have you just designed by PLC pilot machine tool? With oneself experience, want to understand the knowledge of the following respects at least: The 1 working principle that knows PLC but program controller abbreviation PLC, with relay the system is similar, PLC also is by input part, part of logistic part and output is comprised, the input is collected partly and save controlled the data that moves actually partly, logistic part processing inputs the information that obtains partly, judge those functions to need to make output response. Output is offerred partly be in a lot of controlled device, which a few equipment need to operate processing in real time. PLC uses the microprocessor that circuit of large scale integration makes and memory to form logistic part. Although the action of logistic part and relay control a system similar, but its are comprised, working principle, run mode and former it is disparate. Pass process designing, can change its neatly to control a process, was equivalent to changing the hard wiring line of relay, this is so called " but program " . After the 2 languages that master PLC and instruction knew the working principle of PLC, the language that understands it is easier. PLC language is the commonnest echelon graph and statement express two kinds. Among them again most intuitionistic become reconciled uses echelon figure. Want detailed knowledge to be able to read relevant teaching material, of ambitious attune is, although the principle is same, dictate basically also very much the same, but symbol of different PLC instruction meets manufacturer differ somewhat, for example, it is ascendant edge differential together, the product of company of 3 water chestnut expresses with PLS, ohmic dragon company calls DIFU however, and door subsidiary is │ P │ on the west. These specific distinction are about to see the process designing manual of all sorts of products. 3 societies use all sorts of process designing software in an its input PLC wanting after a program has been made up, what used in the past is more is to hold process designing implement, want manual input, more troublesome, make mistake easily. In recent years year as the computer gain ground, already was replaced by place of all sorts of process designing software gradually. For example always the WinProladder of grand company edits software, the CX-PROGRAMMER of ohmic company. The STEP-7-MICRO-WIN32 of Xi Menzi company. These tool software are OK move below the environment of WINDOWS, use very convenient, when your make choice of after PLC of a manufacturer, must learn to use its process designing software, because of this huge managing your process designing and debug time. With always the WinProladder editor software of grand company is exemple, when process designing it can offer the input range of operand for you, search special statement quickly. According to echelon the graph generates a statement automatically to express, point out among them solecism, when debug it passes data line the program fast and accurate pass into PLC, next monitoring carries out condition, can nod compulsive set to inputting output each / restoration. Still can have online edition. Anyhow, mastered the use method of process designing software adroitly when you. Certain can the finish design job of get twice the result with half the effort. Signal of pilot of 4 clear PLC has those PLC control output signal according to inputting a condition. Inputting signal is the pushbutton on console, the spacing switch on the machine tool, the of all kinds sensor such as pressure relay and photoelectricity switch, and output nods what control relay or contactor coil to be connected, of indicator light flicker, the suction of electro-magnet of hydraulic pressure a powerful person adds up to the output of the signal terminal that reachs transducer. When doing a machine tool to design we encounter two problems via regular meeting, one is the I/O check the number that PLC can expand it is finite, another is increasing I/O check the number is to should raise cost. So we should know pilot signal has those, how much are each, statistic goes out to more or less is need inputted and output a dot, single out PLC accordingly. CNC Milling