ScriptGen as its LI replayer, and its architecture is similar to that of Honeybrid de- scribed in Section 18.104.22.168. In particular, SGNET uses different backend honeypots for malware handling. Argos collects and contains malware samples or forwards code injection attacks to the exploit modes in nepenthes. ScriptGen acts as a general vul- nerability module for nepenthes, and it uses the traffic generated by Argos to update its configuration. Additionally, SGNET integrates with Anubis and VirusTotal for malware analysis. Finally, a unique feature of SGNET is that its distributed architec- ture allows partners around the world to deploy sensors using a common VM image. Traffic found by the sensors are used to update the FSMs of other distributed nodes. Variations of SGNET have also been used in two other advanced hybrid honey- pots [GLB12]. Mozzie extended the containment capabilities of SGNET by using ScripGen to model both sides of a malware conversation. This way command and control traffic, for instance, would not have to leave the network in order to allow for full exploitation. Instead, ScriptGen is used to model the victim in one virtual instance and the master controller in another virtual instance. Finally, AWESOME, which stands for Automated Web Emulation for Secure Operation of a Malware- Analysis Environment, uses ScriptGen to power its replay [FB13]. Like the other projects, Argos is used for malware collection. AWESOME, however, uses external script handlers from Honeyd and Nitro for malware analysis.
Large industrialized amenities often contain number of automation devices such as sensors, actuator sand controllers that can be distributed over large area. They differ in amount of information they generate, refresh rate and required reliability. Specific requirements forced by industrial environment, possibly harsh conditions and cost saving factor must be also taken into consideration . Such diverse demands led to development of various industrial automatic systems. Programmablelogiccontroller (PLC) and Supervisory Control and Data Acquisition (SCADA) are becoming increasingly popular in the daily work. A general approach is presented to exploit models in data acquisition and controlling the different parameters, by integrating them with Programmablelogiccontroller (PLC) and Supervisory Control and Data Acquisition (SCADA). A ProgrammableLogicController (PLC) is a special computer device used for industrial control systems. They are used in many industries such as oil refineries, manufacturing lines, conveyor systems and so on. Where ever there is a need to control devices the PLC provides a flexible way to "soft wire" the components together. Since the late 1970s, PLCs
ABSTRACT: Greenhouse forms an important part of the agriculture.Existing system is difficult to maintain the plant growth so, there is a need of automation in greenhouse. Automatic controlling of the environmental factors such as temperature, light intensity and soil moistureusing PLCis proposed in this system. Theseparameters play a vital role in the proper growth of crops.Here the constant temperature is maintained frequently by turning ON & OFF the light & fan. Temperature and soil moisture is controlled using PLC. Smoke detection is monitored and controlled using Lab View.The purpose of this work is to design a labour free, sensor based greenhouse monitoring & controlling system which is fully automated.The output signal is generated from different sensors, which in turn sent to the PLC for appropriate action. This results in proper growth of plants in greenhouse.
Sanjay N. Huse et al. (2015) have presented a case study for the water supply system to buildings. The main concerns such as throttling were considered while designing VFD for the system. The throttling effect can be minimized, and the extra power consumption can be saved by the application of the VFD as shown in the paper. The use of the VFD drive provides significant savings in both cost and GHG emissions. The flowchart for the automatic control of motor pumps is also shown in the paper.
Traffic signal control system is used to control flow of automobiles through intersection of many roads. This paper presents feasible approach of ProgrammableLogicController (PLC) for controlling traffic signal lights using eddy current displacement sensors and for traffic intersection a proportionate signaling is designed. In this system, piezoelectric material is used to generate power from load of vehicles when the vehicles is in idle situation in traffic signal junction and load of people who usually use pathways across traffic road. This paper also represents that manual traffic signal control system can be replaced by using PLC automatic control system. In this system, maximum around 1200 mV amount voltage generated using 845 gm vehicle load.For this work, SIEMENS, SIMATIC S7-300 PLC, sensors, monitor is used and this idea which is implemented in traffic control system is feasible and affordable in any situation of traffic congestion all over the world.
propagate via the enterprise network to execute code on field devices that results in physical damage to the underlying system (Falliere, 2011).
Stuxnet is a recent example of an intentional malicious cyber event. Stuxnet targeted a specific programmablelogiccontroller (PLC) manufacturer and configuration. PLCs control physical end-devices (e.g., sensors, pumps, motors, valves) at the edge of SCADA systems. Stuxnet functionally alters the PLC’s parameters such that specific drive motors were driven beyond nominal specifications (Falliere, 2011). Additionally, Stuxnet masks modification of the PLCs functions from the SCADA system operator. Stuxnet demonstrates a novel threat to SCADA security since it both altered physical parameters to the system and concealed the modifications.
hardware description of the system and its specifications. Reference  In the Distributed Control System (DCS), the data exchange between the ProgrammableLogic Controllers (PLC) is usually completed through the wired network. ZigBee wireless communication technology is introduced in the design of a new type of PLC to overcome the communication cable boundaries. In  the planning is concentrated on development of mobile automatic guided vehicle (AGV) controlled by decentralized edge PLC SIMATIC ET200S hardware. Wireless communications area unit considered because the two leading two-way communications technologies for the rising good Grid applications in , because the received signals from the NB-PLC and wireless links area unit allowed to hold identical info, to supply robustness against the interference encountered on each links. In  the system is focused on developing an ESP8266 based Low cost Wi-Fi based wireless sensor network, the IEEE 802.11n protocol is used for system. In most of the existing wireless sensor network are designed based on ZigBee and RF frequencies. Reference  discusses the natural bottleneck between mass sensor information and Electric Power Communication Transmission Network to put forward the concept of information aggregation layer under the background of heterogeneous network convergence. And lastly, the  deals with the sample IOT based security system which utilizes the ESP8266 as the wireless module in order to implement the wireless technology. Delta PLC of the model DVP14-SS2 is used for the customization. They are a second-generation model which consists of 8 Digital Inputs and 6 Digital Outputs of a very slender make. High speed timers and counters can be accessed for multiple timing and scheduling of processes. It also sports an adjustable serial port and an expansion bus which facilitates additional modules for increased supervision without extra wiring and is powered by the SMPS connections. An RS232 cable is used to connect to the MAX3232 converter, from which the Wi-Fi module ESP8266 is connected, with the software program downloaded onto it from the Arduino in order to establish wireless transmission and reception. The MAX3232 is used to converts the signals from the RS232 serial port to the proper signal which are used in the TTL compatible digital logic circuits. The MAX232 converts the signals like RX, TX, CTS, and RTS and it is a dual driver/receiver.
The second lab continues by interfacing the pushbuttons from the upper terminal block to the PLC, followed by interfacing the general purpose relays and motor starter first to the upper terminal block, then to the output module of the PLC. This is intended to reinforce the NFPA and workmanship standards expected in the class. Subsequently, the students are provided a short procedure for establishing communications with the PLC for the first time. Once the communications are established, the students work with the Studio 5000® environment for the first time to create a ‘test’ program that configures the input and output modules, creates the initial controller and program tags, and tests the functionality of the hardware. It is left to the students to recognize that this program can be used as a template, thereby eliminating the need to define the I/O configuration and create the tags each time a new program is created.
This work is an attempt to develop an advanced automatic PLC based fault detection technology in railway network to overcome the above problems. If these deficiencies are not controlled at early stages they might lead to a number of derailments resulting in a heavy loss of life and property. This work proposes a cost effective solution to the problem of railway track crack detection utilizing slot sensor which tracks the location of cracked track which then mended immediately so that many lives will be saved.
Abstract: All Buildings have some form of electrical and mechanical services in order to afford a comfortable living environment for human beings. Energy Management System in Buildings (EMS) is to systematize the usage of electricity in the most effective way possible for tenants and commercial scholars. The EMS is a standalone automatic system that checks for the pre-set value and take control towards the operation. Its inputs are timers, current transformers and outputs such as on/off signals which are connected to the devices for the operations. Residence times for different areas are programmed with in the PLC, such that the plant is brought on and off to meet the occupier requirements. For shift wise operation in factories, it helps to save energy. The energy saving is the most important criteria, which is an important factor to be considered for the growth of the nation as well as the organization. The wastage of electricity usage is reduced here.
The conventional machines are converted into automatic machine by which maximum operating time will be saved. Thus the output of the product will be increased. The human intervention is required only for loading and unloading of the components in semiautomatic machines. But this machine can be made fully automatic by using more number of cylinders by which the work piece is loaded automatically. By doing so the machine may run for longer time and loading and unloading can be made without stopping the machine. The number of workers is also reduced and by which more number of machines can be operated by a single operator.
A PLC is a solid-state control system with a user programmable memory, used to read input conditions and set output conditions to control machines or processes such as motors, robots, vision systems, and conveyors which are widely used in manufacturing to coordinate a variety of complex tasks, such as security monitoring, energy consumption management, and control of machines and automatic production lines. PLCs are programmed using ladder logic to develop ladder diagrams as well as hardware and control- related commands (known as instructions). Bit-level instructions for example, are used to examine inputs or energize outputs at specific PLC interface bit addresses. Timer instructions are used to control the timing of events in a process, such as delaying motors from starting at the same time or opening a valve for a given time. Counter instructions turn outputs on or off after a certain number of input transitions. This paper focuses primarily on the development of lessons based on projects.
This work presents the design and implementation of an experimental silo controlled by a PLC (ProgrammableLogicController). The main contribution of this work is to provide a new tool in the control area and industrial instrumentation applied to a silo. A variety of sensors, motors, and electromechanical elements are implemented. The structure is metallic and consists of a conveyor belt made of rollers through which a grain container is moved. The PLC configuration and programming were executed by the Connected Components Workbench (CCW) software and the graphical interface was performed in LabVIEW programming. As a result, an experimental tool for the industrial process automation practice applied to silo was developed.
This project is about design and fabricate of a can crusher machine that operate automatically with the aids of the sensor by using a proper controller and the power source to crush the aluminium cans thereby reduce 70% of its initial volume so that it can overcome the storage problem people face for the recycling purpose.
Provided the difficulty of securing ICS, traditional defense mechanisms have proven rather ineffective. A common defense paradigm is the separation of corporate IT net- works from ICS networks using a demilitarized zone as shown in Figure 3 [1, 5]. Critical control systems are cordoned off by firewalls in order to prevent potentially harmful traffic from entering the ICS space. Unfortunately, as time has shown, this defense fails to address the real problem: ICS systems are designed to trust inputs. Early control networks relied on local access and all commands were considered trust- worthy. Today, there must be a paradigm shift toward “resilient control systems” . Resiliency in ICS requires more than just a proper network configuration. The state of the system must be monitored at all times in conjunction with mechanisms to maintain a safe state close to operational normalcy even in the event of malicious or unexpected disturbances . This approach is discussed by Carcano et al. as an extension of an Intrusion Detection System (IDS) for industrial networks . The idea is to collect data of normal operations and so called critical states before creating metrics to accurately distinguish between the two. During operation, the IDS can then monitor the state of the system rather than simply inspect traffic for signatures. This method allows the IDS to determine when a system is approaching a critical state and take protective measures before damage is done.
Relays- This relay allows power to switch on and off without a mechanical switch. It is common to use relay to make simple logical control decisions. The development of low cost computer has brought the most recent revolution. At the outset of industrial revolution, especially during sixties and seventies, relays were used to operate automated machines, and these were interconnected using wires inside the control panel. In some cases a control panel covered an entire wall. To discover an error in the system much time was needed especially with more complex process control systems. On top of everything, a lifetime of relay contacts was limited, so some relays had to be replaced. If replacement was required, machine had to be stopped and production too. Also, it could happen that there was not enough room for necessary changes. Control panel was used only for one particular process, and it wasn’t easy to adapt to the requirements of a new system. As far as maintenance, electricians had to be very skill full in finding errors. In short, conventional control panels proved to be very inflexible. As explained above manual or conventional control has some draw backs due to this case we forced to make automatic control system using PLC.
A programmablelogiccontroller is a digital computer used for automation of typical industrial electro-mechanical processes such as control of machinery on factory assembly lines, amusement rides, or light fixtures. PLCs are used in many machines in industries. PLCs are designed for multiple arrangements of digital and analog inputs and outputs, extended temperature ranges, immunity to electrical noise and resistance to vibration and impact. Programs to control machine operation are typically stored in battery-backed-up or non-volatile memory. A PLC is an example of a “hard” real-time system since output results must be produced in response to input conditions within a limited time, otherwise unintended operation will result. Early PLCs were designed to replace relay logic systems. These PLCs were programmed in ladder logic which strongly resembles a schematic diagram of relay logic. This program notation was chosen to reduce training demands for the existing technicians. Other early PLCs used a form of instruction list programming, based on a stack based logic solver. Modern PLCs can be programmed in a variety of ways, from the relay-derived ladder logic to programming languages such as specially adapted dialects of BASIC and C.
PLC inputs must convert a variety of logic levels to the 5VDC logic levels used on the data bus. This can be done with circuits similar to those shown in Figure 2. Basically the circuits condition the input to drive an op- tocoupler. This electrically isolates the external electrical circuitry from the internal circuitry. Other circuit com- ponents are used to guard against excess or reversed vol- tage polarity.
SIMATIC S7-300 MICRO PLC is a full-featured programmablelogic control system that offering stand-alone CPUs, micro-modular expansion capability, and operator interface solutions. Almost any application that requires automation, from basic discrete or analog control, to intelligent networked solutions, can benefit by using the powerful S7-300 family products. It’s also easy programming and maintenance with STEP7-Micro/ WIN software where the development environment for all phases of the application including program development, documentation and machine startup.