How to Program a Siemens S7-300 Programmable Logic Controller

Do you have a Siemens S7-300 Programmable Logic Controller that you are not familiar with but you need to program it NOW! Following is a quick set of instructions I have put together to help you get started programming a Siemens S7-300 PLC.

After loading the programming software and connecting a Siemens MPI cable between your programming computer and the PLC, open SIMATIC Manager by clicking the icon on the desktop. The STEP 7 Wizard: “New Project” window will open. It is easier to use the Wizard to setup communications with your PLC, but I chose to take the scenic route. I figured I would learn more this way. So, close the STEP 7 Wizard window by clicking Cancel. If there are any other windows or projects open, close them. We want to start with a totally new program.

Create a new project by clicking the new project button on the toolbar in the upper left corner of your screen.

The New Project window opens. Here you will see any existing programs located on your computer. Near the bottom of the window, you will see the Name: input form. Type whatever you want to name your new project and click OK.

A new window will open showing the name of your project at the top. You will also see your project in the window on the left hand side of the screen at the top. Right click your project and choose “Insert New Object”. Choose the device you will be programming. We will be using the SIMATIC 300 Station so choose that selection.

You will now see SIMATIC 300 appear in the right window of your screen. It should be highlighted blue. Click anywhere in the window to make the blue go away. Double click SIMATIC 300 and it will move to the left window and “Hardware” will appear in the right window.

Double click “Hardware” and two (maybe three) new windows will open. On the left will be SIMATIC 300 – (the name of your project). The window on the right will be the catalog of parts.

Look in the right window, the parts catalog, and click the plus sign beside SIMATIC 300.

Click the plus sign beside RACK – 300. Click and drag the Rail onto the left window. You will now see the Slots window appear. This is where we will place our PLC components.

We will first choose our CPU. Looking at the parts catalog, in the SIMATIC 300 tree, choose the CPU that you are using. We are using the CPU – 300 so click the plus sign beside that choice.

Now look at the front top left of your PLC. This is where you will find the PLC model. I will use CPU313C-2 DP as an example since this is the model PLC that I use.

Find this CPU in your parts catalog and click the plus sign. You will now see some part numbers.

Look back at your PLC. Locate the door covering the MPI port. This will be the bottom left side of the PLC. At the bottom of the door you will find the part number. The part number for the PLC I am using as an example is 313-6CF03-0AB0.

Find this part number in the parts catalog. You will notice this is another folder. Open it and you will see V2.0 and V2.6. Look back at the PLC, open the door covering the MPI port, and right above the MPI port you will see V2.6.3.

Go back to the parts catalog and click V2.6. Notice how a slot in the left hand window will highlight green. I believe it will be slot #2. (Slot #1 is reserved for power supplies.) This is where you will drag and drop your CPU. (Notice the software will not let you put the CPU in any other slot but slot #2.)

When you release the mouse button over slot #2, a new window will open, “Properties – PROFIBUS interface”. Click new, a new window opens, click Ok, and then click OK again. We are not setting up a network at this time.

You will now see your CPU and associated hardware listed.

Double click in the Slot that list your DI16/DO16 (Digital Input/Digital Output).

A window with three tabs will open. The first tab will be General, the second tab will be Addresses and the third tab will be Inputs.

Open the tab “Addresses”. We need to change the default addresses. Do this by unchecking the System Default button and changing 124 (or whatever address you have) to 0. Do this for both the Inputs and Outputs.

We now need to change the Node Address. Go back to the window where you double clicked DI16/DO16 and double click in Slot 2, the CPU 313-2DP slot.

The Properties – CPU 313C-2DP window will open.

Look down the window a little over half way and find the Interface area and click on Properties. Another window, “Properties – MPI interface CPU 313-2DP” will open.

Change the address to meet your specific criteria. I know that my laptop, which I am using to program my PLC, is always addressed as 1 and my target PLC is usually addressed as 2. You will probably be the same.

Now click MPI(1) and click OK. Click OK again to close the Properties window.

Save and Compile by clicking the icon located on the left of the toolbar.

Download the hardware configuration to the PLC by clicking the download icon located on the toolbar.

A window titled “Select Target Module” should open. Click OK.

Another window titled “Select Node Address” will open. You should see listed your node address for the PLC you are working with as you configured it in a previous step. If not, click view and click on whatever node address appears and click OK.

Switch back to SIMATIC manager (by clicking the tab on the taskbar).

Click on Options. Choose Set PG/PC Interface. Choose PC Adapter (Auto).

Click Properties. A new window will open, displaying either Automatic Bus Profile Detection or Local Connection. Click Local Connection and choose USB. Now choose Automatic Bus Profile Detection and change the address to 30. You can check your connection now by clicking Start Network Detection. If a new window opens displaying Network Type = MPI, Transmission Rate = 187.5kbps, you have established communications with your S7-300. Click Close. Click OK. Click OK.

It is now time to start programming. Looking at the SIMATIC Manager window, click the plus sign located beside SIMATIC 300(1), click the plus sign beside CPU 313C-2DP, click the plus sign beside S7 Program(1). Now click on Blocks and you will see System data and OB1 appear in the right window on your screen.

Double click on OB1 and a new window will open named Properties – Organization Block

Here you can choose how you want to program, in LAD (ladder), STL (statement list), or FBD (function block diagram). Choose which you want to use and click OK.

Double click OB1 again and the LAD/STL/FBD programming window will open.

You can now start programming.

I have these same instructions with pictures on my website at

Motorcycle Automatic Transmission – The Top 3

Motorcycle enthusiasts love a wild goose chase such as the famously beloved, Bigfoot. Many motorcyclists fail to believe that there is actual automatic transmission motorcycles that exist. This is not true because the knowledge isn’t out there. This is actually true because of there just aren’t to many readily available. The top three automatic transmission motorcycles really exist and the proof is found by reading on.

3. The Honda DN-01

The Honda DN-01 was introduced in 2005 as a cruiser motorcycle. This is one of the first of very few automatic transmission motorcycles ever released. The bike didn’t actually make it on showroom floors until 2008-2009. This bike is so powerful to the consumer that it is still being offered in shops as of early 2011. Missing you chance to check out the Honda DN-01 is just wrong. The Honda DN-01 is just one of those bikes you can’t miss a chance to try out for yourself.

2. The Aprilia Mana 850

The Aprilia Mana is a newer automatic transmission motorcycle that was just released last year. This bike is fast and very powerful. The Aprilia Mana 850 is a sleek sports bike that offers highlights from leather to chrome and everything in between. There is nothing better than a quick bike with the backing of being an automatic transmission motorcycle. The Aprilia Mana 800 makes its way to this top three list for being a solid bike with an even nicer ride.

1. The Honda CB750

The Honda CB750 has had many models in its series between 1969-2003. The Honda CB750 automatic transmission models is better known as the Honda CB750 Hondamatic. This model is one of a kind that has a coil ignition start and a solid inline four stroke SOHC air cooled engine. The only downfall to this model was the fact that the gear changing was not automatic. Instead, each gear was chosen by a foot-controlled hydraulic valve. This bike only sold in the North American market but can now be found all over the world.

Gas Moped Scooter – Not Just For Fun

Buying a gas moped scooter is a great way to have fun on the road without emptying your bank account. In the past scooters have mainly been used by teenagers for getting to and from friends houses, school or college. You can often see them admiring each others scooters outside coffee shops etc. The most popular models being the Vespa, Lambretta, piaggio and the smaller Honda models.

This trend is now starting to show signs of change, the main reason is the recent rise in gas prices and heavy city traffic, consequently more and more commuters are looking at the gas moped scooter as a reliable way of getting around town.

The scooter companies are beginning to recognize this and are producing higher spec models to entice the more mature dollar their way. One of the biggest producers is Honda who have a stunning range of higher powered scooters, such as the Silver Wing; this a stunning gas moped scooter which is sleek and stylish it has a smooth liquid cooled twin engine and the acclaimed Honda v-matic transmission. The Silver Wing has a seating capacity for two and tons of storage for that hard to stow brief case and spare motorcycle helmet.

If you want the comfort of the Silver Wing but with a smaller engine the Honda Reflex is a great choice. From city streets to country roads to long stretches of highway, the Reflex gas moped scooter is built for any number of rides. Its smooth 249cc engine, automatic transmission and comfortable seating for two deliver the goods to get you going, wherever the day takes you.

The Piaggio X9 Evolution 500 is an excellent gas moped scooter and satisfies all needs. Agile, easy to handle and the most compact of all maxi scooters. Once out of town, it is able to shift character and open up to wide open spaces with remarkable ease. The X9 has a top speed of 98mph comes with disc brakes and and on board computer.

It is well worth considering using a scooter or small motorcycle for getting around the city or those short trips to the store or football game where you can just park and forget it. You will be amazed how much you will save on insurance premiums and most of all gas. One fill up will probably satisfy the average commuting needs for a month so why not make your next vehicle purchase a gas moped scooter.

Biker Lifestyle – Building the Perfect Custom Harley Chopper

If you ride to live, then you know what it means to own a custom Harley chopper, and I am not talking about some add-on chrome bike either; Anyone with some cash can drop by your local Harley Davidson dealer and ride away on a new Road King, or other of their other factory models.

A real custom Harley chopper is a one of kind custom built masterpiece that is created from the ground up, a 100% all original work of American beauty that reflects the personality and lifestyle of the proud owner. Hard core bikers know what I am talking about; the painstakingly hard work of creating and shaping a one of a kind statement of riding to live, and living to ride, wrapped around the perfect custom Harley chopper.

Building the perfect Harley doesn’t happen over night either, everything must be the perfect balance of frame, forks, the right rake and extension, rolling on tires and wheels that support the whole design. Every thing matters when building the perfect custom Harley, and if you are truly hardcore, then to complete the full extension of machine to man could mean 100% custom parts, engine, tank, and chrome. Nothing but the best will do.

So what does it take to build the perfect custom Harley motorcycle? First off it takes a boatload of cash, then you gonna need to find the right craftsman to hand all that cash to, and then brother you need some patients; you gonna have to sit down and talk with your craftsman, and help him understand how you are, what is important to you, so he can put pen to paper to form up some rough ideas. These ideas will be shaped and tweaked and considered until your Harley craftsman has the design that is truly you, and no one else.

Every nut, bolt, piece of molding, the right handlebars, and grips, absolutely everything will be well thought out, and nothing will be left to chance, or just thrown in. The perfect ride height that flows with a saddle that is made to fit your backsides contour, and all of the remaining pieces that are build around the heart of your custom chopper, the engine and   transmission .

With you custom Harley almost complete, there will hours and hours of assembling and disassembling, fine tuning, tweaking, and testing until the final phase will be applying the richest paint job and graphics that turn thousands of dollars of hard earned cash and countless hours of laborious love, sweat, busted knuckles, and blood into the work of beauty that is your custom Harley chopper.

OK so where do you find this custom chopper craftsman? Well I am sure you already know the answer, and this isn’t an overnight decision either, we have read every biker rag, went to all of the top bike shows, studied every custom bike we come across, and after we have researched all of our options, we pick up the phone or ride out to our craftsman and after a serious conversation or two we close the deal by shaking hands, signing some paperwork, and dropping that that big fat wad of cash we have been saving for who knows how long.

Those of you who have lived that dream of building and owning the perfect custom chopper know what I am talking about. Those of you still working on the dream will very soon know as well. The love of our lifestyle is but a reflection of how we live, carry ourselves and the bike we ride, the rest of this love is in our hearts!

Defining Wind Generated Electrical Power and Discussing Pros and Cons of the Technology


Wind generated electrical power exists through harnessing wind-power energy with turbines. To fully understand wind generated electrical power, one must understand how wind powered electricity is made; resources needed to utilize wind power; types and sizes of wind turbines; building a wind turbine; potential positive and negative impacts of the technology; where wind powered electricity can be effectively generated; and, offsetting the costs of wind powered electrical technology.

How Wind Powered Electricity is Made

The technology of wind generated electrical power functions by creating electricity through the use of various styles of wind turbines. Initially, one might ask, “So how do wind turbines make electricity?” Simply said, a wind turbine works the opposite of a fan. Instead of using electricity to make wind, like a fan, wind turbines use wind to make electricity. The wind turns the blades, which spin a shaft, which connects to a generator and makes electricity.

Resources Needed to Utilize Wind Power

The primary resource of Wind powered technology is, of course, wind. Wind is very abundant in many parts of the United States and other parts of the world. Wind resources are branded by wind-power density classes, ranging from class 1 (the lowest) to class 7 (the highest). Good wind resources (e.g., class 3 and above, which have an average annual wind speed of at least 13 miles per hour) are found in many areas. Wind speed is a critical of wind resources, because the energy in wind is proportionate to the cube of the wind speed. In other words, a stronger wind means more power.

Wind resource development requires land and may compete with other uses of that land, and those alternative uses may be more highly valued than electricity generation. However, wind turbines can be positioned on land that is also used for grazing or even farming. Wherever a wind farm is to be built, roads are cut to make way for shipping parts. At each wind turbine location, the land is graded and the pad area is leveled. Wind energy also requires the building of wind turbines.

Types and Sizes of Wind Turbines

Modern wind turbines fall into two basic groups: the horizontal-axis variety and the vertical-axis design, like the eggbeater-style Darrieus model, named after its French inventor. Horizontal-axis wind turbines typically either have two or three blades. These three-bladed wind turbines are operated “upwind,” with the blades facing into the wind. Darrieus models, or vertical-axis wind turbines, have two vertically oriented blades revolving around a vertical shaft.

In addition to different types, there are many different sizes of wind turbines. Utility-scale turbines range in size from 100 kilowatts to as large as several megawatts. Larger turbines are grouped together into wind farms, which provide bulk power to an electrical grid. Single small turbines, below 100 kilowatts, are used for homes, telecommunications, or water pumping.

Small turbines are sometimes used in connection with diesel generators, batteries, and photovoltaic systems. These systems are called hybrid wind systems and are typically used in remote, off-grid locations, where a connection to the utility grid is not available.

Building a Wind Turbine

The first step in building a wind turbine is setting up the tower where the fiberglass nacelle is installed. The nacelle is a strong, hollow casing that contains the inner workings of the wind turbine. Usually made of fiberglass, the nacelle contains the main drive shaft and the gearbox. Its inner workings also contain blade pitch and yaw controls. The nacelle is assembled and attached onto a base frame at a factory.

The most diverse use of materials and the most experimentation with new materials occur with the blades. Although the most dominant material used for the blades in commercial wind turbines is fiberglass with a hollow core, other materials in use include lightweight woods and aluminum. Wooden blades are solid, but most blades consist of a skin surrounding a core that is either hollow or filled with a lightweight substance such as plastic foam or honeycomb, or balsa wood. Wind turbines also include a utility box, which converts the wind energy into electricity and which is located at the base of the tower. The generator and electronic controls are standard equipment whose main components are steel and copper. Various cables connect the utility box to the nacelle, while others connect the whole turbine to nearby turbines and to a transformer.

Potential Positive and Negative Effects of Wind Powered Electricity

There are a variety of potential positive and negative impacts of wind powered technology.

Potential positive impacts include:

• Wind energy is friendly to the surrounding environment, as no fossil fuels are burnt to generate electricity from wind energy.

• Wind turbines take up less space than the average power station. Windmills only have to occupy a few square meters for the base; this allows the land around the turbine to be used for many purposes, for example agriculture.

• Newer technologies are making the extraction of wind energy much more efficient. The wind is free, and we are able to cash in on this free source of energy.

• Wind turbines are a great resource to generate energy in remote locations, such as mountain communities and remote countryside.

• Wind turbines can be a range of different sizes in order to support varying population levels.

• When combined with solar electricity, this energy source is great for developed and developing countries to provide a steady, reliable supply of electricity.

Potential negative impacts include:

• Wind turbines generally produce less electricity than the average fossil fuelled power station, requiring multiple wind turbines to be built.

• Wind turbine construction can be very expensive and costly.

• Wind turbines can have a negative impact to surrounding wildlife during the build process.

• The noise pollution from commercial wind turbines is sometimes similar to a small jet engine.

• Protests and/or petitions usually confront any proposed wind farm development. People feel the countryside should be left intact for everyone to enjoy its beauty.

Where Wind Powered Electricity Can be Effectively Generated

Places in the world where wind blows strong and often, people and businesses can harness the wind as an option to use in the generation of electricity. Globally, these places include much of North America, southern South America, Greenland, most of Europe, Northern Africa, eastern Asia, most of Australia, and anywhere there are mountains or large hills. The top 5 countries producing electrical wind power in 2007 were: Germany, United States, Spain, India and China, respectively.

Considerable wind speeds also occur across oceans and large water bodies. Since most of the world’s population lives near oceans, wind farms with strong offshore and onshore breezes could produce an abundant amount of electricity. On land in the USA, the major wind corridor is the Great Plains which includes the states of North Dakota, South Dakota, Nebraska, Kansas, Oklahoma and Texas. The wind corridor also extends into the states west to the great mountains west, including eastern Montana, Wyoming, Colorado, and New Mexico. There are also considerable wind resources in eastern and southern Minnesota and the entire state of Iowa, diminishing south through Missouri and east through southern Wisconsin and northern Illinois, Indiana and Ohio. Parts of New York and the New England states also have considerable wind.

The Department of Energy (DOE) estimates that wind power could supply the US with 100% of its electricity, just from the Great Plains wind corridor or from offshore wind farms alone. According to the “Pickens Plan,” a $10 billion wind farm with 2500 generators can supply enough energy for 1.3 million homes, and for $1 trillion the Great Plains wind corridor could supply 20% of America’s electricity. That would be about 250,000 generators to supply 130 million homes.

In a report published by the U.S. Department of Energy, “20% Wind Energy by 2030: Increasing Wind Energy’s Contribution to U.S. Electricity Supply,” that report concluded that:

• Reaching 20% wind energy will require enhanced   transmission  infrastructure, streamlined siting and permitting regimes, improved reliability and operability of wind systems, and increased U.S. wind manufacturing capacity.

• Achieving 20% wind energy will require the number of turbine installations to increase from approximately 2000 per year in 2006 to almost 7000 per year in 2017.

• Integrating 20% wind energy into the grid can be done reliably for less than 0.5 cents per kWh.

• Achieving 20% wind energy is not limited by the availability of raw materials.

• Addressing  transmission  challenges such as siting and cost allocation of new  transmission  lines to access the nation’s best wind resources will be required to achieve 20% wind energy.

Offsetting the Costs of Wind Powered Electrical Technology

Although wind generated electrical power seems to be an unlimited resource, and, the best wind sites appear to be competitive with market electricity prices in most U.S. regions, several factors exist that make it a less appealing source of alternative energy in terms of economic cost. First off, wind is not uniformly priced resource. Its costs vary widely depending on project scale, wind speed, region, and other factors. Second, the benchmark for comparison with wind to other fuels varies regionally. Third, extra revenue is required to make a project viable, sunk costs are considerable.

To offset the factors that make wind powered electricity a less appealing source of alternative energy and promote its continued growth, wind energy in many areas receives some financial or other support to encourage development. Wind energy benefits from subsidies either to increase its attractiveness or to compensate for subsidies received by other forms of production, such as coal and nuclear, which have significant negative impacts. In the United States, wind power receives a tax credit for each Kilowatt hour produced; that was 1.9 cents per Kilowatt hour in 2006. The tax the credit has a yearly inflationary adjustment. Many American states also provide incentives, such as exemption from property tax, mandated purchases, and additional markets for “green credits.” The Energy Improvement and Extension Act of 2008 contain extensions of credits for wind, including micro-turbines.

Secondary market forces also provide incentives for businesses to use wind-generated power, even if there is a premium price for the electricity, socially responsible manufacturers pay utility companies a premium that goes to subsidize and build new wind power groundwork. Companies use wind-generated power, and in return they can claim that they are making a “green” effort.

Undoubtedly, further tax credits, subsidies and incentives will also be needed to achieve the goal of 20% Wind Energy by 2030. Today, wind power approximately accounts for about 2% of the electricity generated in the United States.


The technology of wind generated electrical power functions by creating electricity through the use of various styles of wind turbines is a very viable alternative energy. Although wind generated electrical power does have some negative impacts, this author feels that in terms of long-term cost and benefit compared with other types of energy, such as the burning of fossil fuels, using a renewable resource such as wind generated electrical power economically, environmentally, and socially is making more and more sense.