ESALAN safe application of PLC in the nc machining center

In recent years, China's machine tool processing equipment such as enterprises get rapid development. Technically, machine tools and equipment have got great progress, has as much as the international level, some even reached the international leading level. But many machine tools in the market, the price is low, especially high-grade machine tool, facing the brand, price, quality and so on many challenges. One of the main reason is the domestic many enterprises only pay attention to in the machine function and application of research, development, improvement, and in such aspects as safety, environmental protection, failed to meet the relevant international standards, and international market also has the very big difference, enterprise's products export is blocked, leading to some can't brand compete on the international stage and abroad. For the need of enterprises to export, many enterprises have gradually from began to imitate to consciously to strengthen security protection, self-discipline and safety consciousness constantly improve. On the other hand, along with the increasing breadth and depth of reform and opening-up, many foreign companies into the domestic, and participate in the domestic market competition, take market. Equipment companies have to face great pressure of competition, to take active measures to deal with. The way simply by reducing the cost of production is limited, is the main way to increase product added value. In addition to the product function is perfect, complete, product safety, high reliability is more and more become the user to select one of the main reasons. Domestic peer competition, resulting in the pursuit of productivity to reduce operating costs, safety accident also increases accordingly. Countries constantly increase the strength of the security legislation, law enforcement, safety standard releasing, security has become the people daily life, work topics of concern. Machine equipped with safety protection device, not only become the self-protection of the individual, is also the interest of the enterprise, the effective ways to reduce the risk of accidental loss, therefore equipped with safety protection measures has become a CNC machine standard configuration. To date, most security protection of class machines's approach is the safety device independent design together, after cannot very good effectively achieve a complete system solutions. To this end, the author here of a imported machine configuration ESALAN safety PLC relay product introduction, and provide all design content and methods of the safety device, can also be taken as reference to choose the safety relay. Select the basic principles of security products and EN954 - according to the European machine directive 1 the basic requirement of security levels, first, on the basis of the machine's working mode, function, need to work on the machine may be all of the risk analysis, evaluation, determine the risk level of each part of the machine, so as to select the corresponding security level, general level 3 can satisfy most application. Then part of all security and protection to do statistics, including the security level of input, output, protection, the operation mode of the system and the way of system reset. The final design, choose the right means of security and protection and products. ESALAN COMPACT appearance and properties ESALAN COMPACT is an integrated several safety relay ( 5 ~ 8) In the integration of safety PLC. Can provide users 24 input ( E02. 0 ~ E04。 7) Security, nine semiconductor output ( A00。 1 ~ A00。 7,A01。 0,A02。 0) And three security relay output ( A01。 1 ~ A01。 3) 64 time, as well as the internal relay ( T00. 0 ~ T63。 0) And 512 markers ( M00. 0 ~ M63。 7) 。 ESALAN COMPACT appearance safety PLC controller input allows single channel and dual channel. It for every external input take dual channel data processing. ESALAN interior is equipped with two different manufacturer's design and manufacturing technology of microprocessor, in-house software is also take different design idea, therefore regardless of the hardware, software, and the probability of failure is very low. At the same time, based on their basic two monitoring system designed are redundant, only the two systems are normal and allow the signals output, a corresponding logic signals to be transmitted to the next level correctly accept unit, until the output. ESALAN protection system based on the analysis of the structure and properties of the nc machine tool, determine the system security level for not less than 3. Including the input points statistics are as follows: 1, security door, 1 fan, around each equipped with two door lock switch and threshold position switch Q1, Q2). 2, emergency stop button E1, E2, touch screen operation stage 1 only, machine work station 1 only. 3, CNC axis state detection sensor T1, T2, test the speed of the spindle. 4, hydraulic system pressure detection protection switch signals (P1, P2. 5, W1 tool placed position detection signal. The same output circuit is also take the principle of dual channel detection, CPU1 and CPU2 all normal work, output 1 and 2 output connected at the same time, load can work; Likewise for semiconductor output and relay output. Just for semiconductor output, users need to prepare for the absorption of excess capacity and interference. According to the needs of security and protection, statistical output points are as follows, not including main control unit of the control signal and the output: 1, 2, spindle motor control relay, Ka, Kb. 2, hydraulic motor contactor 2 only, Kc, Kd. 2, 3, locks open signal about each one, to Kg, Kh. 4, electromagnetic valve output 2, Ke, Kf. 5, inverter control safety output 1. 6, safety monitoring lamp output 1, indicating working condition. Connection instance software implementation ESALAN COMPACT products provide application software CD, installed on the PC. Can realize the online or offline design, parameter setting, etc. , after the completion of the work, through RS232 interface downloaded to the device.
Nowadays, it is very common for us to utilise in plc controller price. And the quality of is decisive to production efficiency.
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Making a few technical tweaks to the way you structure and distribute plc manufacturers could be the difference between an engaging, thought-provoking product and a perfunctory one.
have three basic components.