Make the design of PLC realizes taller efficiency and productivity

0 or intelligence is made (SM) focus 1. The factory is encouraged " improve plant operation efficiency 10% (loss / unit product) " 2, yield with less the sources of energy, water and other rich more product. Somebody thinks, the only way that this is the demand that contented whole world increases ceaselessly 3. Program industry 4.

The purpose of 0 is " the resource productivity in elevating whole value chain continuously and efficiency " 4. To make " yield the biggest change... the key is about to improve resource productivity... with resource efficiency. " so, a lot of document and report hold with following themes consistently: The production factory of 21 centuries must optimize systematic productivity and efficiency, the identical or lower cost that with 20 centuries production same product place requires produces manier product. Contemporary automation factory improves productivity mostly through electron and IT, especially but controller of process designing logic (PLC) with distributed control system (DCS) , what already became the nowhere in modern plant to be absent is numerous neurological centre is controlled. We the factory in distributing extensively and controlled call at every module of identical PLC and DCS, subsystem or component " neurological " . When you allow when to await the productivity that improves these subsystem and efficiency, produce the operation to whole factory positive effect. How does article introduction make the design of PLC and implementation achieve taller efficiency and productivity, also discussed to anticipate -- of the produces need system of contented constant in the future growth anticipate. The article introduces an exceedingly good subsystem reference to design Alameda, should consult the design uses the efficient power source that stimulates type transformer instead to offer 4 efficient, extremely output of high accuracy imitate. Pass deploy Alameda, automation factory will see the great leap of productivity of its PLC system instantly, satisfy the efficiency requirement that will come to SM factory ahead of schedule. 4 imitate are outputted, go without common noise, the system of imitate output reference of PLC and DCS is dedicated at imitate function; Taller efficiency and systematic productivity often by oversight. If a certain architect tries to improve systematic efficiency through compositive power source, still need to solve systematic noise problem. Now, a kind of way can realize output of imitate of 4 high accuracy to be able to solve noise problem again already: Alameda (MAXREFDES24# ) reference of subsystem of output of 4 passageways imitate is designed (graph 1) . Alameda has 4 high accuracy (< ± 0.

1% ) agile imitate output, efficient report keeps apart power source, and automatic breakdown detects and overheat is protected. Complete hardware and firmware design file and lab measure data, can help fast prototype and development. Component amount is less, have bigger versatility height compositive the key that is here, compositive raised versatility, avoided noise problem, and reduced amount of parts of an apparatus. We understand hardware above all (graph 2) . 4 passageways of MAX5134, 16, the core that taking DAC of amortize voltage output, tall degree of linearity is this system. Parts of an apparatus has extremely 4 passageways, small dead band (the biggest 0.

02V) , full amplitude output, so need not source of DAC negaive electricity. Parts of an apparatus offers voltage to output, 4 MAX15500 signal recuperates drive implement input. Also want to notice at the same time, DAC outputs direct drive to recuperate implement input, without exterior component, make interface very simple. Every MAX15500 is electric current of imitate of only channel, low cost, high accuracy / voltage outputs recuperation implement, develop to satisfy PLC and DCS requirement only. Signature manages implement the job is in limits of ± 24V power source, generation user but process designing, odd polarity and output of bipolar, high accuracy electric current or voltage. Electric current outputs drive to be as high as 1k Ω load, voltage output drive is low the load to 1k Ω . MAX15500 has been had flow to be protected with short circuit, also monitor overheat and the circumstance that drop report, provide comprehensive erroneous report. Output of standard drive imitate recuperates voltage of MAX6126 freeboard precision implement the fiducial input with DAC, initiative precision is 0.

02% , the biggest temperature coefficient (Tempco) for 3ppm/ ℃ . To data segregation, MAX14850 is measured to the spot and the data communication of side undertakes systematic controller segregation. Complex power source and data segregation are 600VRMS. Power source inputs limits by segregation, wide dc, stimulate type transformer to offer instead. Mode of peak value electric current stimulates efficient drive of type controller MAX17498B to keep apart transformer instead, support + 18V comes + input of 32V odd volts d.c. , generation ± 24V and + 8V output. The highest work efficiency of MAX17498B circuit is 85% . Coupling of capacitance of the 1000pF that installs correctly, 2000V keeps apart the ground twice, still maintain segregation at the same time, reduce imitate to output noise. MAX1659 low pressure is poor (LDO) linear manostat will + 8V output adjusts to + output of 5V low noise. Whole system needs 24V input to serve as power source only. Design course LX9 and ZedBoard platform test and verify in the light of Alameda of LX9 and 　 of ZedBoard platform development. Alameda has brief veneer to carry Pmod compatible connector, can join to the spot with compatible Pmod but array of process designing door (FPGA) / small controller is developed board. Offer code of driver of the project file of these two kinds of platform, parts of an apparatus and give typical examples at present. Can download whole source code and file through the following network address: Http://www.

Maximintegrated.

Com/alameda. Function measures differential nonlinear (DNL) , integral is nonlinear (INL) do not adjust an error with add up to (TUE) the index of the mainest technique that is PLC and system of other process control. MAX15500 height is agile, can configure, satisfy the requirement of different application. Data is in + obtain below 25 ℃ . In pursueing below, because code 0 to the 320 dead band limits in MAX5134 (0 to 0.

02V) , the DNL that 320 DAC code before place, INL and TUE mark are 0. - 10V comes + the DNL below Cheng of mode of 10V voltage output, 20% excessive, INL and TUE measure a result to if pursue,part 3, 4 show with 5. Odd polarity voltage (0 to 5V) , bipolar electric current (- 20mA comes 20mA) with odd polarity electric current (0 to 20mA) measure data to be able to refer to the following network address: Http://www.

Maximintegrated.

Com/alameda. Conclusion industry 4.

0 make with intelligence advocate brand-new the 4th acting industry to make, these concepts increase a of productivity and efficiency brand-new 21 centuries on behalf of modern chemical plant. Now, the occurrence of Alameda subsystem makes must anticipate productivity and efficiency are more feasible now. Alameda provides high-powered imitate output and exceedingly good power source efficiency, apply to the IO module inside PLC and DCS; Solved relevant noise problem, accelerate industrial system design. If open a place to narrate, alameda will produce positive effect to the operation of whole factory. CNC Milling CNC Machining