ESET 225 PLC/Pneumatic Interfacing Agenda

The process of observing a parameter, comparing it against a desired value, and the action to bring the parameter as close as possible to the desired value.

The three terms associated with any process are controlled quantities, manipulated quantities, and disturbances.

In manual control, the operator is able to inspect the indicator visually and manipulate a flow into the process to achieve some desired value or set point of the controlled variable.

<p>In feedback control, sensors measure the actual values of the controlled variables. The feedback control hardware automatically compares the set points of the controlled variables and the measured values of the same variables. Based on the difference, the feedback control hardware calculates signals that reflect the needed values of the manipulated variables.</p> Signup and view all the answers

<p>The elements of a control system are: 1) Process, which consists of an assembly of equipment and material that relates to some manufacturing sequence.</p> Signup and view all the answers

<p>The purpose of ESET 225 PLC/Pneumatic Interfacing Agenda for Week 9 is to have Lab 5: Find Analog min/max values.</p> Signup and view all the answers

<p>The purpose of ESET 225 PLC/Pneumatic Interfacing Agenda for Week 10 is to have Lab 6: Analog input / output scaling.</p> Signup and view all the answers

<p>The purpose of ESET 225 PLC/Pneumatic Interfacing Agenda for Week 11 is to have Lab 7: Pressure control.</p> Signup and view all the answers

<p>0 to 130 PSI</p> Signup and view all the answers

<p>Current and voltage signals</p> Signup and view all the answers

<p>Two input and two output channels</p> Signup and view all the answers

<p>Analog Input signal connection for changing output pressure; Analog Output signal connection for measuring current output pressure</p> Signup and view all the answers

<p>24 VDC</p> Signup and view all the answers

<p>Two current inputs and two current outputs</p> Signup and view all the answers

<p>Analog Input and Output</p> Signup and view all the answers

<p>Analog signals</p> Signup and view all the answers

<p>Instruction List (IL) is a low-level language similar to assembly language, while Structured Text (ST) is a high-level language similar to Pascal or C.</p> Signup and view all the answers

<p>Ladder Diagram (LD) is the most widely used programming language for PLCs and can be used in combination with other types of programming.</p> Signup and view all the answers

<p>In Instruction List (IL), the program is built using low-level instructions similar to assembly language, while in Structured Text (ST), the program is built with expressions using a wide variety of high-level statement types.</p> Signup and view all the answers

<p>Function Block Diagram (FBD) programming is very common in the process industry.</p> Signup and view all the answers

<p>The key advantage of Ladder Diagram (LD) programming is that it is the most widely used programming language for PLCs and can be used in combination with other types of programming.</p> Signup and view all the answers

<p>The Structured Text (ST) programming example uses an <code>IF-THEN-ELSIF-ELSE</code> statement to assign different values to the variable <code>N7:0</code> based on the states of input variables <code>I:0/0</code>, <code>I:0/2</code>, <code>I:1/5</code>, and <code>I:1/4</code>, as well as the values of other variables <code>N7:5</code>, <code>N7:6</code>, and <code>N7:2</code>.</p> Signup and view all the answers

<p>The text does not provide any information about Sequential Function Chart (SFC) programming, so there is not enough information to answer this question.</p> Signup and view all the answers

<p>Instruction List (IL) is described as a low-level language that is not user-friendly, while Ladder Diagram (LD) is the most widely used and original programming language for PLCs.</p> Signup and view all the answers

<p>A Function Block Diagram expresses the behavior of functions, function blocks, and programs as a set of interconnected graphical blocks, similar to electronic circuit diagrams. It looks at the system in terms of the flow of signals between processing elements.</p> Signup and view all the answers

<p>Functions are designed to perform common processing tasks like math and trigonometry, and take inputs to produce a result. Function Blocks are equivalent to special purpose integrated circuits, containing both data and an algorithm, and can keep track of the past. Function Blocks are modular and independent.</p> Signup and view all the answers

<p>A Sequential Function Chart is based on the GRAFCET standard, with changes needed to convert it from a documentation standard to a set of execution control elements. It can mix any of the other IEC 1131-3 language types, such as using Function Blocks as step actions and Ladder Logic to define transitions.</p> Signup and view all the answers

<p>Key benefits of implementing IEC 1131-3 include reduced waste of human resources, increasing software reusability, and reducing misunderstandings and errors.</p> Signup and view all the answers

<p>Function Blocks are more advanced than basic Functions, as they can contain both data and an algorithm, and can keep track of past state. This makes Function Blocks more modular and independent compared to simpler Functions.</p> Signup and view all the answers

<p>The Function Block Diagram is a graphical language that models the flow of signals between processing elements, while the Sequential Function Chart is a control flow diagram based on the GRAFCET standard that can incorporate elements from other IEC 1131-3 languages.</p> Signup and view all the answers

<p>The Sequential Function Chart language can mix elements from other IEC 1131-3 languages, such as using Function Blocks as step actions and Ladder Logic to define transitions. This provides more flexibility compared to traditional ladder logic programming.</p> Signup and view all the answers

<p>The primary motivations for IEC 1131-3 include reducing waste of human resources, increasing software reusability, and reducing misunderstandings and errors in industrial control programming.</p> Signup and view all the answers

<p>Analog outputs convert 16-bit integer values placed in the output image to voltage or current signals for the slot that the analog card is in.</p> Signup and view all the answers

<p>The analog signal received by the PLC appears as an integer in PLC units, which is not useful without converting it into units we understand, such as PSI, Bar, or MPa.</p> Signup and view all the answers

<p>The linear equation y = mx + b is used for analog signal conversion or scaling.</p> Signup and view all the answers

<p>The CPT (compute) instruction is used for analog signal conversion. It takes an equation entered by the user, generates an output based on the input variables, and stores the result in a destination file. The CPT instruction will only generate outputs if all input conditions on the rung are true.</p> Signup and view all the answers

<p>The CPT instruction needs to be continuously enabled or on at all times because the application requires continuous calculation of the analog signal conversion.</p> Signup and view all the answers

<p>y = (100 / 20000) * 10000 + 0 = 50 PSI</p> Signup and view all the answers

<p>The CPT instruction will only execute and generate an output if all input conditions on the rung are true.</p> Signup and view all the answers

<p>The destination file is where the result of the analog signal conversion calculation performed by the CPT instruction is stored.</p> Signup and view all the answers