Tài liệu PLC Programming Methods and Applications P2 pptx
Tài liệu PLC Programming Methods and Applications P2 pptx
... loops and optional programming commands. The processor consists of themicroprocessor, system memory, serial communication ports for printer, PLC LAN link and external programming device and, ... fundamentalunderstanding of the various types of PLCs available, the advantages and disadvantagesof each, and the way in which a PLC executes a program. The open frame, shoebox, and modular PLCs are ... first PLCs were developed and why they were better than the existingcontrol methods. ” the difference between the open frame, shoebox, and modular PLC configurations, and the advantages and disadvantages...
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Tài liệu PLC Programming Methods and Applications P1 docx
... 1-27 - OR -AND Lamp CircuitSWITCH1 and SWITCH2 and SWITCH3SWITCH1 and SWITCH2 and SWITCH4SWITCH1 and SWITCH3 and SWITCH4SWITCH2 and SWITCH3 and SWITCH4SWITCH1 and SWITCH2 and SWITCH3 and SWITCH4The ... •()()(1-3)SWITCH1SWITCH2SWITCH3SWITCH4LAMP3L3PB1PB2PB3PB4Figure 1-26 - AND- OR Lamp Circuitrecommended. In a PLC, the ordering of the rungs is critical and rearranging the ordercould change the way the PLC program executes. AND OR and OR AND Let us now ... compartmentalize and organize the controlcircuitry so that it is easier to understand and troubleshoot. However, keep in mind that,later in this text, when we begin PLC ladder programming, the...
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Plc programming methods and applications
... Programmable Logic Controllers: Programming Methods and Applications byJohn R. Hackworth and Frederick D. Hackworth, Jr.Chapter 1 - Ladder Diagram Fundamentals1-7Figure ... IN3 ENTER4. AND IN4 ENTERThe LD command for IN3 causes the previous two lines of code (lines 1 and 2) tobe transferred to the Stack. After lines 3 and 4 have been input, lines 1 and 2 will be ... IN2) and (IN3 OR IN4).These two branches are to be AND& apos;ed together.Chapter 5 - Mnemonic Programming Code5-8Figure 5-5 - Ladder Diagram to Implement OR - AND - ORFunctionUsing the LD and...
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Tài liệu Process Systems Analysis And Control P2 pptx
... by substitution into the differential equation and, as expected, are found to be -2 and respectively. Thenx(t) = -2 + + + + and the constants and are determined by the three initial conditions.The ... 1)(3.1)where A and B are constants. Hence, using Table 2.1, it follows that = A + Be-’(3.2)Therefore, if A and B were known, we would have the solution. The conditions onA and B are that ... in the denominator may be factored, and expanded in partial fractionsx(s) = + 9s 8 A B + + 1) = s-2 (3.7)To find A, multiply both sides of Eq. (3.7) by and then set = 0; the result isA=-8(-2)(1)(2)(-l)...
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Tài liệu Industrial Power Engineering and Applications Handbook P2 docx
... therefore common for hand tools and home appliances and also for such applications that require a high speed (above 3200 r.p.m) which is not possible in an a.c. machine. Likely applications are ... motors Applications requiring extremely small motors, in both size and horsepower, may be designed for shaded pole construction. Electronic drives, cassette players, recorders and similar applications ... fan cooled motor (Figures l.lS(a)-(d) and 1.19(a) and (b) Circulation by integral independent component: Like a fan, driven by an electric motor, and the power is drawn from a separate...
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Tài liệu PLC PROGRAMMING MANUAL - Basic & Applied Instructions Edition
... X005Y002Y003MPSMPPX006MPSMPSMPP0000 LD X00000010002 AND X00100030004 AND X0020005 OUT Y00000060007 AND X0030008 OUT Y00100090010 AND X00400110012 AND X0050013 OUT Y00200140015 AND X0060016 OUT Y003MPSMPSMPPMPPMPSMPPCircuit ... X000 is OFF, and Y000 turns OFF when X000 is ON.INV instruction can be used in a same position as serial contact instructions (AND, ANI, ANDP and ANDF).Different from LD, LDI, LDP and LDF instructions ... ]***)Handling of bit devicesDevices which handle only the ON/OFF information such as X, Y, M and S are called bit devices.On the other hand, devices handling numeric values such as T, C, D and...
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Tài liệu Teach Yourself Electricity And Electronics P2 pdf
... devices function in radio re-ceivers and transmitters, telephone networks, digital computers and satellite links (toname just a few applications) .Conductance and the siemensThe better a substance ... of juice,” and the supply of chemical energy must be restored bycharging. Some cells and batteries, such as lead-acid car batteries, can be rechargedby driving current through them, and others, ... is equal to one thousand volts (1,000). One megavolt (MV)is equal to one million volts (1,000,000) or one thousand kilovolts.In a dry cell, the EMF is usually between 1.2 and 1.7 V; in a car...
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Tài liệu Corrosion: Fundamentals, Testing, and Protection P2 docx
... secondary reference electrodes that are easier to construct and handle, less sensitive to impurities, and whose potential is very stable and well- known with respect to the SHE (Ref 1). The simpler ... reference and test electrodes must be minimized. These criteria are detailed subsequently. Stable and Reproducible Potential. Electrodes used as references should rapidly achieve a stable and reproducible ... H2(g). Any non-standard reversible hydrogen electrode with well-controlled H+ activity and H2 fugacity can also be used as a reference. The equilibrium potential (Eeq) of a nonstandard reversible...
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Tài liệu Understanding static Methods and Data ppt
... purely to act as a holder of utility methods and fields. A static class cannot contain any instance data or methods, and it does not make sense to try and create an object from a static class ... Math. So, what's happening and how does this work? You will often find that not all methods naturally belong to an instance of a class; they are utility methods inasmuch as they provide ... Understanding static Methods and Data In the previous exercise you used the Sqrt method of the Math class. If you...
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Tài liệu Metal Machining Theory and Applications ppt
... tool mustwithstand do depend on cutting speed and feed and rake angle, and on the work material’s96 Work and tool materialsFig. 3.17 Machining characterisitcs of a low alloy (•) and a semi-free-cutting ... Work and tool materialsFig. 3.12 Representative specific force and shear plane angle variations for hot rolled carbon and alloy steels (f= 0.15mm, α= 6º)Fig. 3.13 Process stresses and temperatures ... speed and, obviously, also with feed). Temperatures, on theother hand, depend not only on the material being machined (both through stress levels and thermal properties) but also on the speeds and...
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