TILI Automation

 Piston flow meters are ideal for low viscosity fluids due to the tight tolerances & fits they use. However, due to these tight fits, clean fluid must be used (or filters put in place) as a particle getting trapped can actually block flow. They operate by a piston moving within a chamber of known volume. When fluid passes into this chamber, the piston displaces an exact volume of liquid. Piston meters are great for low volume flow measurements. Piston Flow Meters Piston Flow Meters offer the highest accuracy and measure the lowest flow rates of any meter. These precision meters are suitable for all low viscosity liquids.

 Stepper motors are DC motors that move in discrete steps. They have multiple coils that are organized in groups called “phases”. By energizing each phase in sequence, the motor will rotate, one step at a time. With a computer controlled stepping you can achieve very precise positioning and/or speed control. For this reason, stepper motors are the motor of choice for many precision motion control applications. In this theory section, we’ll get a quick reminder about how stepper motor works. Stepper motors work in very specific way, a standard stepper motor will have two or more coils that charge and discharge when electricity is allowed to flow through them. The animation below illustrates that. When the coils are charged and discharged in a specific pattern (usually sequentially), it creates an electromagnetic attraction between the coil and the motor. When this occurs fast enough it makes the stepper motor turn, and we get the movement you see above. Advantages of Stepper Motor P...

 The common method of measuring flow through an open channel is to measure the height or HEAD of the liquid as it passes over an obstruction (a flume or weir) in the channel. Using ultrasonic level technology, Open channel flow meters include a non-contacting sensor mounted above the flume or weir. By measuring the time from transmission of an ultrasonic pulse to receipt of an echo, the water level or “Head” is accurately measured. Open Channel Flow Measurement Animation Credits : greyline Flumes and weirs are specially designed channel shapes that characterize the flow of water. Common types are Rectangular Weirs, V-Notch Weirs, Parshall flumes and Palmer Bowlus flumes. The choice of flume or weir type depends on the application: flow rate, channel shape and solids content of the water.

 An ON/OFF Valve is the fluid equivalent of an electrical switch, a device that either allows unimpeded flow or acts to prevent flow altogether. These valves are often used for routing process fluid to different locations, starting and stopping batch processes, and engaging automated safety (shutdown) functions. What is ON/OFF Valve ? Valve styles commonly used for on/off service include ball, plug, butterfly (or disk), gate, and globe. Large on/off valves are generally of such a design that the full-open position provides a nearly unimpeded path for fluid to travel through. Ball, plug, and gate valves provide just this characteristic: A plug valve is very much like a ball valve, the difference being the shape of the rotating element. Rather than a spherical ball, the plug valve uses a truncated cone as the rotary element, a slot cut through the cone serving as the passageway for fluid. The conical shape of a plug valve’s rotating element allows it to wedge tightly into the “closed...

 A sensor is an input device that provides a usable output in response to the input measurand. A sensor is also commonly called a sensing element, primary sensor, or primary detector. The measurand is the physical parameter to be measured. An input transducer produces an electrical output that is representative of the input measurand. Its output is conditioned and ready for use by the receiving electronics like PLC or DCS. The receiving electronics can be an indicator, controller, computer, PLC, DCS etc. The term “transmitter,” as commonly used with industrial process control instrumentation, has a more narrow definition than those of a sensor or transducer: 4-20 mA Transmitter A transmitter is a transducer that responds to a measured variable by means of a sensing element and converts it to a standardized transmission signal (like 4-20mA) that is a function only of the measured variable. Transmitters can have any of several electrical connection schemes. The most common and easiest...

 Instrumentation engineering is a valuable job that’s performed in a variety of areas but is rarely seen by the public. Instrumentation engineering refers to the creation, analysis, measurement, control, and maintenance of the industrial process. These are used in industrial areas like manufacturing, food processing, oil & gas, power, and energy production. The industries have to follow government regulations and meet certain standards for quality. Achieving precision in these areas means that highly technical instruments and tools are used to analyze and survey each industry. Instrumentation engineers are the masterminds behind the success of any of these industries as they develop, maintain, and repair the required tools and instruments. As such, there is a lot of education to complete. In fact, the Wall Street Journal reports that the majority of these jobs require a college education. Even though you don’t need a license for all sectors of instrumentation engineering, it’s ...

 Write a PLC program to on or off a group of output by one push button in one network, it can be used for safety operations where you want to on/off a group of output like a group of valves or motors. Note: the best practice to learn the PLC programming is to start writing the PLC program, take your time before you review the answer.  Inputs & Outputs I0.0: set/reset Push Button (Normally open contact) QB0: output byte i.e from (Q0.0 to Q0.7) ON and OFF a Group of Outputs PLC Logic When the Set/reset is pressed for the first time the SR flip flop is energized and energizes the move instruction to move 255 decimal value to the QB0 which means move 1111 1111, i.e sets bits from Q0.0 to Q0.7 When the set/reset push button is pressed for the second time the SR flip flop is de-energized, once the SR flip flop is de-energized the negative edge detects that the SR flip flop moved from positive to negative and sends a trigger to the second move instruction if the QB0 decimal value...

 PLC or DCS System ? The following steps discuss about How to choose PLC or DCS systems ? Step 1: Does process require implementation of advanced process control (APC)? No doubt, the vast majority of process control applications can be handled sufficiently with traditional regulatory control using proportional-integral-derivative (PID) technique, or by combining it with other traditional regulatory control functions, such as feedforward, cascade, split range, and ratio control. Yet, as industrial process plants keep demanding higher levels of stability and minimization of process variability, especially for control problems involving multivariables and long process delays, the need for APC techniques, such as neural network, adaptive tuning, model predictive control, and others is growing steadily. DCS manufacturers have been leading the way in integrating APC functionalities into their systems, while PLCs are limited to traditional control methods. And so, if a process demands one...

 DCS are used to control production systems within the same geographic location for industries such as oil refineries, water and wastewater treatment, electric power generation plants, chemical manufacturing plants, automotive production, and pharmaceutical processing facilities. These systems are usually process control or discrete part control systems. DCS are integrated as a control architecture containing a supervisory level of control overseeing multiple, integrated sub-systems that are responsible for controlling the details of a localized process. A DCS uses a centralized supervisory control loop to mediate a group of localized controllers that share the overall tasks of carrying out an entire production process. Product and process control are usually achieved by deploying feedback or feedforward control loops whereby the key product and/or process conditions are automatically maintained around the desired set point. Also Read: What is DCS System? To accomplish the desired ...

  Physical Checks All civil works required for  DCS cabinet  installation shall be completed. Ensure painting work is completed in the area. Ensure completion of false flooring in the area, if applicable Ensure proper lighting available in the control room and Panel Room. Ensure  HVAC  is commissioned for the area or ensure proper ventilation in the area. Ensure proper installation and fixing of the panels at the location as per GA drawing. Check and ensure anti-vibration pads of the panels are in place. Check that dust filter on louvers is clean, for indoor panels Check DCS panels for the physical damage – Door lock, door limit switch, Fans, Tube lights, internal cables, MCBs, isolators, modules, racks, controllers, prefab cables, etc. Check all the components of the panel as per BOM. Check for loose supplied items. Check and verify all hardware like Engineering and operator station as per BOM. Pre-Requisites Ensure availability of approved DCS GA drawings,...