A Programmable Logic Controller (PLC) receives information from one or more inputs. This semiconductor control device processes the information based on a software program. Finally, it sends an output control signal. The microprocessor based control system performs functions such as timing, logic, sequencing and others. The PLC follows instructions from an operator-defined program.

These intelligent systems provide reliable, high-speed monitoring and control of processes in automated applications. In addition, they are easy to program and configure.

Once the program updates the output, the CPU starts over and the cycle repeats again. The cycle depends on the number of inputs, outputs, and size of the program, while the action will depend on the inputs coming from a variety of sensors.

The input sensors include components such as switches, proximity sensors, photoelectric sensors, pressure switches, level switches, encoders and temperature sensors, while the output devices include actuators, relays, switches, and many more.

PLCs rely on software programs that help them in making the necessary decisions. The PLCs are programmed through a variety of tools, which may differ in ease of use, appearance, and complexity. The most commonly used PLC programming language is Ladder Logic, a graphical software that uses common electrical symbols. Other languages include Function Block Diagram (FBD), Sequential Function Chart (SFC) and Structured Text (ST).

The programming is done on the device such as a computer or handheld device after which it is transferred to the PLC memory using a communication interface.

Selecting a suitable PLC that will address your current and future needs can be a challenge, especially with the large number of different PLCs on the market today. The available PLCs have varying capabilities, physical sizes, complexity, cost, power requirements, scalability and other parameters. Therefore, it is necessary to determine the correct programmable logic controller for your specific application. Special systems can be designed for use in harsh environments.

The Programmable Logic Controller has revolutionized and simplified controls in automation and industrial applications. PLCs are easy to install, wire, program and modify to suit changing application requirements. These control systems are usually available in a wide range of sizes that ensure finding exactly what you need for any application.

When winter weather hits, a standby generator can be crucial for keeping your home’s essential functions, including heat (either from your main HVAC system or from a space heater) running. But ice storms and freezing temperatures can prevent the generator from working properly when you need it most. Fortunately, there are a number of add-ons you can install on your generator to keep it running smoothly, even when the thermostat plunges!

You probably already know that cold weather can kill your car’s battery. Well it’s the same for your generator! Thermostatically controlled battery warmers go underneath the battery, turning on when the temperature drops below 40 F. The best part about battery warmers is you don’t have to monitor them—they’re just set and forget.

Warm oil acts as a slippery lubricant, keeping all the parts of your generator moving the way they’re supposed to. Cold oil, on the other hand, turns into a sludge-like substance that can actually prevent movement! A cold weather kit will include a crank case heater that prevents the oil from getting so cold that it becomes unusable.

Manufacturers recommend replacing the standard 10W-30 oil with 5W-30 Synthetic Oil if you do decide to add a heater.

Generac cold weather kits are recommended for CorePower units installed in areas where temperatures below 32 F are common, which includes our area. For generator services in Maryland, Virginia, or Washington, DC, call Kolb Electric today!

Pay as you go electricity plans allow consumers to pay for their electricity in advance. The plan, which uses prepayment meters, helps consumers to monitor and control the way they use electricity. This saves on energy costs.

Keypad based prepaid meters: This meter has a keypad to input the electricity token number. Consumers purchase the credit using a variety of methods. These include visiting the agent, paying through banks or mobile payments in some countries.

Key meter: Consumer uses an electronic key loaded with the tariff information and credit.

One way card system: Uses a disposable card. The user purchases power with a reloadable debit card. The loaded card is then passed near the meter, which has an in-built card reader.

Two-way card systems: Uses a smart card and the meters have a real-time, two-way communication capability. It is one of the most secure, but more complex and expensive methods to implement.

These allow consumers to interact with their meters and query balances using their mobile phones by sending an SMS to a monitoring system. In addition, the user is able to track electricity use by the hour, day, month or annually using the phone or online access.

These smart prepaid meters offer easier top up options. They include online payments or by text, as well as scheduled and auto top-ups.

When using a prepaid meter, the customer must keep track of the remaining credits and replenish to avoid disconnection.

Ensure there is enough credit when going away for long periods. The meter will continue collecting the standing charges even when on no load. Consumers should ensure they have enough credit to last until they return.

Some crooks will take advantage of the consumer’s lack of knowledge and offer them cheaper credits than those bought directly from the utility company. For example, they will sell their credits at half price. This is more common with Key Prepaid Meters and the crooks will usually have master Keys, which they use to top off the consumer’s meter.

If the energy company finds out, the consumer ends up paying twice for their electricity; first to the crook, and then to the energy company.

To avoid falling victim:

just 15 years ago. I wonder if any of the attendees at COMDEX thought to themselves “One day, I can cook my steak with the help of a tiny glowing tool that changes colors when my meat is cooked to perfection.” Probably not. Thankfully Sharper Image did, so now you can cook your steak and monitor it from your smart phone.