Design of a SCADA System

invent of a SCADA System1. IntroductionThe main(prenominal) bea echo of this assignment is to invent a simple SCADA constitution to monitor and provide supervisory confine of a Bytronic Associates Industrial Control Trainer (ICT) through an Allen- Bradlley Micrological governance meterPLC victimisation the Sistemi Winlog professional person softw are package. From the design of PLC persist logic program which was developed using RS-logic for the ICT, this assignment of the frame will add a higher direct of control through software and provide a beginning to the industrial SCADA systems.Supervisory Control and entropy Acquisition (SCADA)SCADA is Supervisory Control and Data Acquisition. In 1993, SCADA system was needed to examine the site for the dissemination systems and excessively for the electric supply. There was a discussion on the SCADA system that which system would be more than a suitable for the site. Almost for each and all packaged systems are combin ed with the complete SCADA system purchase which is different to the method of basic division as when it is utilize in single meters. As we are aware of placing both the meters into the riff gears at the substation and in like manner in building switchgears. It is more in effect(p) estimated for the SCADA systems to examine the status of electrical great power supply systems.In 1994 using the Intelligent Electronic Devices (IEDs)and a DOS based SCADA software package are utilized by the Utility department to part the installation for the SCADA systems. The energy management department is one of the departments in the Utility division required to perk the data from the building meters. The IDEs which provide a communication to the SCADA software as well as an e extensiveate output signal (KW) that can be read by the building energy management system. In this building energy management system, it records the signal to track the electrical energy demand and Kilo wolfram Hour s (KWH).The SCADA software is a graphical package using a Window NT Operation System. This system is consider by the berth Measurement Ltd (PML) provides the programming required to include original AutoCad site map, a plot and in like manner to present the accurate age in pretendation on the header of the graphical conditions. Objects like switch status, all the power system parameters, warning devices and so on. Additionally, this system likewise allow the facilities operations like good system, rubbishmap to achieve the big pictures to set at the background, and alike the channel down to the single an nonation as required. SCADA system automatically generates an alarm and can likewise easily expandable as per the use required. The new systems can easily expandable and flexible to the use as IDEs meter are added.The pursuit are the function that are utilized more and more as the SCADA system is expanded.Automatic inform will be taken with the replacement of manual meter reading.They need to answer quickly when the accredited time alarms and data operators the information.The Utility Department can be practical in providing the customers about the calibre information.The main benefits of using the SCADA software areSwitching and Paralleling OperationsVerification of the somatogenetic change in the switch operator position was not getatable while using of remote SCADA applicationsPower feelingAs needed, generally after a result or upon query from building users the power tincture reports are requested.Hospital and Medical School Emergency Services StatusFrom the Cogeneration Plant, Hospital Emergency Power Feeders are monitored to verify the accessibility of the services, on a continual basis. This prevents the remote possibility that the service is not available or available.Outage RecordPosition incident analysis is essential to avoid reoccurrence of similar outages and power failures.Substation Security Fires and Door AlarmsEarly on i n the design of the SCADA application, it was determined that fire/smoke detectors were required in all substation switch gear rooms. This utility, along with the door alarm contacts, provides the system operators with the ability to respond immediately to these types of actions.2. System DescriptionPLC Diagram DescriptionIn PLC the programs are fabricated based upon the gate simultaneously with the inputs, timers, calculateers, outputs, internal memory bits, analog inputs, comparators, analog output etc. stimulants The physical connections that are committed to the PLC are switches, pushbuttons, detectors and allthing which acts like a switch or signal to the state of ON and OFF position. The voltages that expect to some of the devices are 24V DC and some may not it may vary.The switch when it is in ON state, and so status of the device bit is 1 and when it goes to OFF state the status of the device bit is 0.Output The result that appears from the input devices is the communica tion between the PLC and other terminals. They are used to control the solenoids, detectors, and connectors etc to on and off position.In the PLC, there are 8 demodulators and 5 actuators were used. The result from each detector rejoinder the actuators and other sensing elements to perform the task. These eight sensors has different task they areSensor1 It detects the presence of marijuana cigarette in the hurrying sort area.Sensor2 It detects the components in see of the solenoid at the amphetamine sort area of the spring jumpstart.Sensor3 It detects the presence of ring in assembly area.Sensor4 It is used to commence assembling.Sensor5 It is used to terminate the assembling.Sensor6 It is used to detect the complete assemblies.Sensor7 It is used to detect the components at the pull down sort area.Sensor8 It is used to detect the components and assemblies near the reject area solenoid.The purpose of 5 actuator which are used in PLC area areActuator1 It drives the upper chai n conveyor motor.Actuator2 It drives the trim chain conveyor motor.Actuator3 It knocks the ring in the ring startle.Actuator4 It releases the ring into the assembly area.Actuator5 It rejects the unassembled components.Relay A pass is a switch which is operated on the electromagnetic.Counters when a pre-assigned count value is reached, the digital counters are in the form of relay contact.Timers Timer consists of internal clock, a count value register and an accumulator which is used to count the time.When succeed and ring moves in the upper sort area, the peg moves into to the peg chute through the catching of the sensor1 and the ring moves into the ring chute through the actuator 3. And the actuator 4 is to allow the ring in to the space where the sensor 3 detects the ring for the assembling the ring into the peg in the lower sort area. The sensor 6 it to detect the complete assembled components. The actuator 4 has some delay time for allowing the ring in to assembling area. T he sensor 8 is to detect the unassembled component and the actuator 5 is to reject the unassembled components.Sensor numberSensor type, location and function.PLC Input1Download-looking reflective IR sensor at the upper sort area.Detects the presence of a peg near to and in summit of the solenoid at the top of the ring chute.I 0/42Sideways-looking reflective IR sensor at the upper sort area. Detects a component in front of the solenoid at the top of the ring chute.I 0/13Reflective IR sensor at the assembly area.Detects the presence of component at the very bottom of the ring chute beyond the rotary solenoid.I 0/04Black pushbutton.Used to commence assembling say.I 0/185Red pushbutton.Used to terminate assembling, say.I 0/196Capacitive sensor, near the lower sort area.Detects the presence of passing complete assembles near the reject solenoid at the motor end of the lower conveyor.I 0/67Reflective IR sensor at capacitive sensor near lower sort areaI 0/38Reflective IR sensor at the low er sort area.Detects the presence of components and assemblies in front of the reject solenoid at the motor end of the lower conveyor.I 0/29Through-beam IR sensor, just after the assembly area.Detects components on the lower conveyor leaving the assembly area.I 0/5Actuator No.Actuator type, location and desired functionPLC Output1Upper conveyor motor.Drives the upper toothed chain conveyorO 0/32Lower conveyor motor.Drives the lower plain belt conveyor.O 0/43Solenoid at upper sort area.Knocks ring into the ring chute.O0/04Rotary solenoid at the bottom of the ring chute before the assembly area.Releases rings into the assembly area.O 0/15Solenoid at the reject area.Rejects unassembled components before the complete assembly collection tray.O 0/2Using the winlog pro software, the PLC system can be operated through the ladder program by shutting down the RSlogix and assigning the sensor input pins to the digital supply and actuator output pins to the digital gates.These functions are performed by 4 kinds of SCADA componentsSensors (either digital or analog) and control relays that directly interface with the managed system.Remote telemetry social units (RTUs) These are small reckonerized units deployed in the field at particularized sites and locations. RTUs serve as local collection points for gathering reports from sensors and delivering commands to control relays.SCADA master units These are larger computer consoles that serve as the central processor for the SCADA system. Master units provide a human interface to the system and automatically regulate the managed system in response to sensor inputs.The communications network that connects the SCADA master unit to the RTUs in the field.3. RequirementsThe minimum requirements for the SCADA to perform and control the operation of PLC manually areBy replacing the physical push buttons, providing start/stop to control the ICT from the SCADA.Display the state of all sensors and actuators using the digital gates displays such as conduct or animations.Display the count of the number of rings in the chute at any time (this may also extend to the number of accomplished assembled and rejected components. abide a means of resetting the ring count a value among 0 to 5 (in the event of malfunction). gain a usher with a background bitmap that is either a schematic diagram of the ICT or the actual photograph of the kit.At least one alarm condition example when a component is rejected or the ring in the chute is more than cardinal.ConstraintsIn the numerical gates of winlog pro, the LED components cannot be kept because these are used only for reckoning the rings in the chute and also for the rejecting the components in the chute.In the digital gates of winlog pro, the sensors, actuators, LED and switches are kept. It does not accept the counts.4. SCADA System DesignThe design of a simple control application based on the micrologix DF1 protocol, but the design of more complex systems can be sol ved using the SCADA. It is easy to understand and approach the winlog professional person software and also to communicate the other devices.For any new application, the system has to know the external devices, addresses and communication protocol to communicate from one device to the other devices.In PLC, the program runs between the one of two states for every second in order to maintain the count. According to the SCADA, for each state the LED will be shown and alsofor the count will be shown. The PLC program will be started and stopped by using the switch on SCADA.For creating the variables database devices in the gates of Winlog Pro software, we have to consider the numeric, digital and event alarms correspond to our applications.Numeric gates consists of all the variables that refers to the analogue quantity like counts, set points and so on that can expressed in the form of a bytes, a word, a double word, an integer or by a floating point variable. In this application, the numeric gates are used for the counting, rejecting components, complete counts and also for resetting of both complete and reject counts.Digital gates consists of all the variables that refers to the digital status like alarm conditions, sensors, actuators, configuration option and so on. It can be expressed by a single bit. In this application, the digital gates are used for the input sensors, output actuators and for solenoids and also for switches and pushbuttons.Event/alarm is also used in this application for the purpose of showing the rings in the chute if the rings in the chute are more than four. This configuration is used for the intention of activating the solenoid.The pursuit table shows, the numeric variables configurations are made tally to the applications areContinuation with the tableThe following table shows, the digital variables configurations are made according to the applications areThe following table shows the event/alarm gates configuration are made accordi ng to the applications. And this gate cannot read from the devices but the status will be displayed while at runtime. This gate is provided for the attention of the ring in the chute if the ring in the chute is more than four and we also can create more alarms using this gate configuration. after(prenominal) creating of the gates configurations, we must however it and create the new templates in order to get all the gates for the application and these gates are used for each and every achievement to perform the operation on the particular gates configuration. After adding all the gates, insert all the active label objects like LED, switch and so on and also include the gate to each label to perform the operation when the gate is used in the ladder program. Aftercompletion of adding all the gates, label, chart and bitmap, save the complete configurations. And execute the program.After the completion of the template design, we must assign the simple code using the name as Main in th e Winlog Pro code. It is used only for the function that will open for the main template at the application startup.The following inscribe shows the final template design thats required for the applications areThe above figure represents the complete design of template after arranging all the gates and chart and bitmap.5. TestingAfter the creation of the templates and Winlog Pro code in the software, close the Winlog Pro and run the RSLogix 500 to create the program and download the Micrologix 1000 ladder program listed in the section. After downloading, go to the Run mode and shutdown the RSLogix 500 and also RSLogix service.Restart the Winlog Pro software, to run the communicate in end manager and select Execute from be sick menu. Then after executing the project, it will moves in run mode to start the project according to the application requirements. Winlog Pro samples variables from devices and processes the results in graphical representations.When the project that where d one by the users to startup then it automatically achieves the main templates.By clicking the switch object label, we can start and stop the execution of the program. When the program is in running mode, we can see the number of rings that the actuator 3 pushes into the chute and the peg that enter into the peg chute by the detection of the sensor 1And if the ring in the chute is more than four then the alarms will be in active (blowing condition) mode that informs the ring cant allow into the ring chute more. The count display the number of ring in the ring chute and edit loge is to editing the value that enter in it. By clicking the toggle switch, we can reset both the completed assembles and rejecting components. We can select the chart to show the graphical representation of the counts and digital like pushbutton and switches. The chart also displays the group of variables that we want to display.The below figure displays the switch button is in ON condition and the counting of ring in chute is 5. If the ring count is more than four in the chute then the alarm blows. And resetting all the completed assembles and rejected assembles. The chart 1 describes the switch buttons (black color) and pushbuttons (blue color) when it is in ON condition. The chart 2 describes the count of the rings in the chute (green color), completed assembled components (lite blue color) and rejected components (red color).The below figure shows the counting of rings in the chute (green color), completed assembled components (lite blue color) and rejecting the components (red color) when the switch button is in ON condition.6. DiscussionUtility System Operators need to be able to continue to remotely and instantaneously, identify electrical Power System Failures at any location in the distribution system. Accurate real time alarming and historical information is needed to continually meet the needs of a diverse fellowship of energy users. A continuation of the demands for high rel iability and accurate performance and trending data is paramount is the long term benefits of the SCADA systems.Approaching the SCADA system design for an application is the first time and in particular Winlog Pro software, it can be easily to communicate with other devices using the RS-232 9pin connector.Winlog Pro software can accessible easily and understand quickly to the external devices. For different applications, the design of the system for each device should be addressable and the list of all the variables can read or write to the devices. And for the applications the gates configuration should be addressable. Depending on the ladder program the address should be made and we can design different templates.Without any restrictions of all the winlog pro licenses software, it can provide the functions, development tools and communication protocol. The software toolbox acknowledges the continuous efforts of sielco sistemi to make the winlog pro more competitive and attractive. This powerful, low cost and easy to use SCADA software is indeed salt away increasing agreement among Italian and international users.Winlog Pro is simple, flexible and more economical in real time applications. It provides the differ tool like gates builders, templates, code builders. It allows the drivers to interface and communicate with all the electronic devices like PLCs, I/O modules and so on.ConclusionUsing the Winlog Pro software, the results that are required for the project are achieved. Using this software, we are assigning all the object labels to the gates configuration. The counts the numbers of rings are assigned to the numeric gate and the digital gates like LED, sensors and actuators and solenoids are assigned to this gate. For each and every gate the address will be allocated. The ladder program that where written in RSlogic 500 should be downloaded and switch it to run mode. Close the RSlogic and execute the project that was done in winlog Pro software project manager. Thus, the program and the logic were tested and the results are achieved successfully without any error.ReferencesReferred notes by J.G.Pierce.http//www.sielcosistemi.com/en/products/winlog_scada_hmi/