The main analysis cpu modules

Domestic small PLC is facing another important constraint is the product of the market. PLC applications suitable for 90% of industrial and domestic applications of small businesses PLC about 20,000 , more than 90% are SMEs. Faced with such a fragmented market , domestic enterprises must micro smart plc  effectively organize planning traditional sales activities. The author believes that strong marketing and foreign multinational companies are different, domestic enterprises should be on break point to end customers . We are pleased that we visited customers , about 90 percent of customers to accept the concept of domestic PLC , 50% of customers are willing to try the product , especially in the procurement process more efficient private enterprises, from the trial to be able to quickly batch procurement. From our survey, we can  plc controllers see that these companies are most concerned about is not the brand, but the product performance and stability , the product is available once they are convinced it will not hesitate to use domestic PLC, because of their own production facilities and foreign products are competition. cpu modules small PLC is the product of a high degree of product , foreign multinational companies have decades of operating history , a major international supplier ranking PLC hardly changed over the past decade . Faced with such a mature , stable plc digital output  market , domestic enterprises are facing difficulties can imagine , on the technology , products, brands , marketing , finance, human resources , quality, service and other factors that constitute the business chain , each link needs to carefully treatment, the risk of any one link will cause the whole chain breaks .

What is a compact plc cpu modules

OB1 is the main program loop execution module corresponding to the block, which  micro smart plc is the backbone of STEP 7 program. Most other OB corresponds to a different interrupt handler in. Each OB and is closely linked to its corresponding type and priority. OB1 relatively low priority, it is a priority, so OB1 usually can always be interrupted by other OB.
Control Function Module FC1-FC8, according to the current running status of the device in which the implementation of the corresponding control functions, each corresponding equipment to complete action on the device; temperature control module FC10, FC11 control function is read into the device horizontal, vertical and two The plc intelligent controller  current direction of the temperature signal, the D / A conversion and digital processing, and the results compared with the set temperature, with the result of the comparison, the control horizontal, vertical and two of the heater switch, the switching frequency and the response speed of the heater can be achieved by setting the PID controller parameters.
 Shared data storage module DB100 for the current operating status and  cpu module plc working methods, including horizontal, vertical in both directions sealing temperature setpoint and actual values ​​into / out of the running speed setting material as well as the need to adjust with the timer , the counter value is set such that the stored data can be called at any of the functional modules.

Features plc cpu modules in each module on the computer motherboard

DMA channel containing the chipset controller, 8-channel control and data  cpu module management DQR0 ~ DQR7's. DMA channels currently used to exchange data with the computer equipment directly to a floppy disk, Ultra DMA hard drives, SCSI hard drives and optical drives and other external devices IDE interface
Real-time clock and CMOS RAM timer
The system provides real-time clock timer date and time when the system is industrial automation plc  shut down, the date and time stored in the CMOS RAM, when powered by a battery, and continue to go.
  With the current integration of development, most are integrated into the chipset Northbridge and Southbridge chips. Northbridge chip on the motherboard is a chip from the CPU recently, in charge of the L2 or L3 Cache, memory interface, CPU Interface, AGP graphics interface and high-speed ECC error correction. Southbridge responsible for KBC (keyboard controller), RTC (real time clock controller), PCI, ISA, USB, Ultra DMA/33 (66) EIDE data transmission and ACPI (Advanced Energy Management) and so on. Northbridge which plays a leading role, also known as the main bridge.
 In recent years, AMD and INTER are integrated in the CPU memory controller, a large plc analog io module  part of the motherboard, most motherboards including h61 later canceled the Northbridge, Northbridge functions will be integrated into the CPU. Northbridge may later we rarely see it.

Some simple introduction plc cpu modules of

Logical processor is threaded, is called a logical processor should he  communication modules plc processor is not complete, as you can understand the basic structure of the execution unit of the processor.
Dual-core 4 thread is hyperthreading, his understanding is not dual-core simulation into four core, he is to be a core integrated two logical processors that two execution units. So that he can be like four-core processors in addition to four-threaded task, overwhelmingly in support of multi-core tasks are to support Hyper-Threading, but the dual-core 4 thread is always a dual-core processor.
Here to explain the core is there a more complex combination consisting  programmable plc of multiple parts, he does not just consist of the processing unit, the core processing unit contains something + L1, L2 + + instruction processing unit clock generator and so on. Hyper-Threading is to integrate the two core execution units.

plc analog input modules continue to take advantage of the domestic application of technology plc

(1) for such a huge market, China should focus on financial and technical strength, develop and produce a series of proprietary products as soon as possible plc, plc technology is from closed to open, it uses a lot of technology, common hardware, software standardization, makes plc design and production of technical barriers no longer exist. In recent years, coupled with the rapid development of chip technology, the introduction of plc temperature module  products with international competitiveness plc has become possible. Domestic manufacturers should come together to form plc group of companies, the establishment of specialized research institutions to jointly develop a variety of mechanical and electrical products, such as: inverters, servo systems, man-machine interface, greatly improve product reliability, compatibility, establish a sound sales network and service system, the courage to compete on the international stage with the multinationals, the only way the product can be based on domestic plc (2) China's automation industry plc domestic market continued to take advantage of the application of technology to expand the application fields. The plc applications in various fields of national economy, we must also by virtue of technology and labor advantages, gradually integrate into the international plc application market, actively participate in international competition, technological advantages of our application to form a true value-added services, driven by industry-related equipment and software development. iec61131-3 has established a world-recognized software product model plc directly using iec61131-3 standard domestic enterprises to keep pace with the international advanced level shortcut. Full  programmable intelligent controller account of the plc in a variety of different industries when applied to the internal resources required software model set aside sufficient resources, so our product development plc iec61131-3 to comply with international standards. (3) plc expanding range of applications, while efforts on the software integration. For different industrial processes, with its own distinctive form of system integration software, HMI software and application software. (4) the development of small plc products, you must select an appropriate balance between integration, functionality, applicability, economy, etc., designed to meet the different requirements of users of the product. Small plc will continue to be the market mainstream products, small plc is most likely the first to achieve localization, according to the characteristics of China's current economic development, small plc localization is the trend. Based on the domestic market, the domestic plc manufacturer can quickly provide users personalized products tailored according to the specific needs of the intelligent plc  user. The Chinese users multinationals difficult to rapid feedback to the special needs of foreign plc contributed to the rapid improvement of the manufacturer of the product.

Some problems plc cpu modules of

Drive in function provides a variety of fieldbus communication module , is ideal for system integration applications , parking facilities and remote monitoring applications ; built-in PLC function can Nanda plc controller suppliers  replace the small single-chip controllers, counters and timers , thereby significantly reduce system cost , which is very suitable for price-sensitive machining industry ; adopts European design , can hang side by side rails can be added back , compact body type can be significant savings in installation space ;
Meanwhile, the products do parallel DC bus powered , energy efficient mutual feedback absorbed , distributed braking resistor burden , and more than one use the same brake module , greatly reducing the Nanda plc digital input  system cost ; fully comply with export requirements.
In addition, the product can also be convenient and flexible range of optional accessories , such as I / O card , A / D, D / A module, digital operator , PG card , communication module, the customer may need a reasonable configuration , allowing the system to achieve best value for money ; perfect protection , high accuracy current sensing , are the highlights of its functions .
Drive only in product features, performance and  Nanda plc input output modules control technology are always inherited the advantages of automation Delta family , but also in the application point of view , a flexible modular design, environmental protection and energy saving aspects of innovation . But even more noteworthy is that , VFD-E series inverter built a powerful PLC 's

Full servo warp knitting machine mechanical structure and working principle plc cpu modules control

 The traditional textile industry processes , including fibers, weaving, finishing and garment four parts. Weaving process , including woven , knitted , woven and non-woven . Divided into warp knitting Nanda digital input module  and weft . After all the work on the needle with a group or several groups of yarns arranged in parallel , in the warp feeding machine , but formed into a circle knit , this method is called warp knitted fabric formed by weaving called matter . Our warp knitting industry after decades of development , constant restructuring, especially high in recent years, companies in emerging regions warp starting point , reasonable structure , significant  Nanda ethernet module plc economies of scale , into scientific research universities and research institutes , as well as research combined to make our warp knitting industry has been developing rapidly , is becoming the center of world warp industry. Traditional warp knitting machines , mostly chain-type warp knitting machine , because of its mechanical structure of the spindle drive , no import electric drive , resulting in its following disadvantages: woven flowers slow and inefficient ; chain complex mechanism , each replacement of a  Nanda micro smart plc flower , you need to spend more time , and each pattern corresponds to a chain block , this time to replace the long pattern , high cost. Resulting in the production of small batch orders lost meaning ; due to the complexity of the organization , resulting in a complex pattern can not be produced on a chain block machine . Only produce relatively simple fabric flower , can not meet the increasing demands , the current full servo warp knitting machine has gradually been applied in the textile . Now all servo on warp knitting machine production , efficiency , pattern diversity, quality of products have a good advantage , and therefore will become the mainstream in the future jacquard weaving .

plc cpu modules in the PLC control system design methods

First, the most important issue to mention the programmable controller technology is used in automatic control engineering , how to use a comprehensive knowledge learned in front of the point , according to the Nanda plc controller manufacturers  actual requirements of reasonable engineering combined into the control system , introduced in this control system consisting of a programmable controller general methods.
Second, the basic steps programmable controller system design 1. The main contents of the system design ( 1 ) to develop control system design specification. Technical conditions generally in the form of design task to determine which is the basis for the entire  Nanda cpu modules plc design ; ( 2 ) select the form of electric drive and motor , solenoid valve actuator ; ( 3 ) PLC selected models ; ( 4 ) the preparation of the PLC input / output allocation table or draw input / output terminal wiring diagram ; ( 5 ) to write software specification according to the system design requirements, and then use the appropriate programming language ( commonly ladder ) program design ; ( 6 ) understand and follow users cognitive Nanda plc digital input  psychology , attention to human-computer interface design , enhance rapport between man and machine ; ( 7 ) console design , electrical cabinets and non-standard electrical component parts

cpu modules plc purposes

Memory card CPU module must plug in the power-off state, the power does

not affect the operation because it is FLASH ROM.
Uninterruptible power plug, then the risk may  Nanda plc supplier damage the card is such a

set of rules, who would not take the risk hot plug, if you do not believe

this ramp, then it is so dry, may be uncertain or bad, but who can not

protect you Not bad, because he is not hot swap stuff.
U disk, IC card is hot swappable, but he Nanda analog output plc  has some special structure, in

addition to its reader device for his actions also have special

considerations when unplugging U disk like the best is to close , in

essence, is he not read and write.
PLC can not seen when the CPU module memory  Nanda Programmable Input Module card reader U disk hot-swap

operation is described as so considered, so that you do not take risks.

Which calculation plc cpu modules ten modules

CPU has the basic functions of the following four areas:
1 This refers to the sequence control instruction execution order control program instructions. There is between each instruction in Nanda plc IO module  the program's strict order, the order must be in strict accordance with the procedural requirements of the execution, in order to ensure the correctness of the computer work.
2 the function of controlling the operation of an instruction executed by a computer is often a component in a sequence of actions to achieve. CPU according to these instructions, to produce the corresponding operation control signals sent to the corresponding components to  Nanda plc program logic controller control these components according to the requirements of directive action.
3 Time Control Time Control is the timing of the implementation of a variety of operating time. During the execution of an instruction, and at what time to do what action should be strictly controlled. Only in this way, the computer can automatically work methodically.
4 data encryption for data that arithmetic and Nanda plc input output modules  logical operations, or other information processing.

What is the reason plc cpu modules

(1) We live with analog instruments, is the pressure, level, temperature and other signals into 1-5V ,4-20mA ( there are other signals , such as 0-10V ,0-5V , etc. ) and then to the PLC processed .
2.PLC not know the size of the specific  Nanda Programmable Output Module voltage or current signal .
So, we use a number to indicate its size, then tell PLC, PLC in order to know the voltage and current signals input specifically how much.
For example , we measured the temperature is now 20 degrees ( range 0-50 degrees , the output range is 1-5V), a temperature sensor generates a voltage value at that time is (5-1) * 20/50 = 1.6V ( instrument characteristics must be linear so it can be counted ) . After the PLC analog input module receives input of 1.6V , which will be converted into a digital value. For Nanda digital input module  example , the resolution we are using the analog input module is 0-4000 of the corresponding 1-5V . Well , 2.0V should correspond ( 4000-0 ) / ( 5-1 ) * 1.6 = 1600. That is , PLC , after reading the analog input module to its 1600 figures will be able to know it , from the temperature sensor to sensor temperature is 20 degrees

develop plc cpu modules of

As under the relevant national policies to stimulate domestic demand and China's economy, the domestic market will end PLC slow growth  Nanda PLC plc communication module before re-entered the high-growth period.
PLC where it experienced a high-speed period, the annual growth rate has been maintained over the 30 to 40 percent growth rate, PLC capability in handling analog and digital computing power, human interface capabilities and network capacity has been greatly improved, and began to erode the traditional DCS market.
Currently, the relevant favorable policies will promote the healthy and rapid development of PLC products. The next five years will continue our rapid development of the PLC market in 2015 will reach 8.8 billion yuan more than the size.
Meanwhile, from the relevant economic data, the domestic  Nanda PLC Programmable Input Module market has been restored PLC to 9% -11% of the high-speed growth in 2010 and 2012. Therefore, the combination of national development policies and economic data analysis shows that China's PLC market growth in the coming years will re-enter the high-speed development period.