| Do you have a Siemens S7-300 Programmable Logic | | | | #2.) |
| Controller that you are not familiar with but you need | | | | When you release the mouse button over slot #2, a |
| to program it NOW! Following is a quick set of | | | | new window will open, “Properties – |
| instructions I have put together to help you get | | | | PROFIBUS interface”. Click new, a new window |
| started programming a Siemens S7-300 PLC. I have | | | | opens, click Ok, and then click OK again. We are |
| these same instructions with pictures on my website | | | | not setting up a network at this time. |
| at | | | | You will now see your CPU and associated hardware |
| After loading the programming software and | | | | listed. |
| connecting a Siemens MPI cable between your | | | | Double click in the Slot that list your DI16/DO16 |
| programming computer and the PLC, open SIMATIC | | | | (Digital Input/Digital Output). |
| Manager by clicking the icon on the desktop. The | | | | A window with three tabs will open. The first tab |
| STEP 7 Wizard: “New Project” window will | | | | will be General, the second tab will be Addresses and |
| open. It is easier to use the Wizard to setup | | | | the third tab will be Inputs. |
| communications with your PLC, but I chose to take | | | | Open the tab “Addresses”. We need to |
| the scenic route. I figured I would learn more this | | | | change the default addresses. Do this by |
| way. So, close the STEP 7 Wizard window by | | | | unchecking the System Default button and changing |
| clicking Cancel. If there are any other windows or | | | | 124 (or whatever address you have) to 0. Do this |
| projects open, close them. We want to start with | | | | for both the Inputs and Outputs. |
| a totally new program. | | | | We now need to change the Node Address. Go |
| Create a new project by clicking the new project | | | | back to the window where you double clicked DI16 |
| button on the toolbar in the upper left corner of your | | | | DO16 and double click in Slot 2, the CPU 313-2DP |
| screen. | | | | slot. |
| The New Project window opens. Here you will see | | | | The Properties – CPU 313C-2DP window will |
| any existing programs located on your computer. | | | | open. |
| Near the bottom of the window, you will see the | | | | Look down the window a little over half way and |
| Name: input form. Type whatever you want to | | | | find the Interface area and click on Properties. |
| name your new project and click O | | | | Another window, “Properties – MPI interface |
| A new window will open showing the name of your | | | | CPU 313-2DP” will open. |
| project at the top. You will also see your project in | | | | Change the address to meet your specific criteria. I |
| the window on the left hand side of the screen at | | | | know that my laptop, which I am using to program |
| the top. Right click your project and choose | | | | my PLC, is always addressed as 1 and my target PLC |
| “Insert New Object”. Choose the device | | | | is usually addressed as 2. You will probably be the |
| you will be programming. We will be using the | | | | same. |
| SIMATIC 300 Station so choose that selection. | | | | Now click MPI(1) and click OK. Click OK again to |
| You will now see SIMATIC 300 appear in the right | | | | close the Properties window. |
| window of your screen. It should be highlighted | | | | Save and Compile by clicking the icon located on the |
| blue. Click anywhere in the window to make the | | | | left of the toolbar. |
| blue go away. Double click SIMATIC 300 and it will | | | | Download the hardware configuration to the PLC by |
| move to the left window and “Hardware” will | | | | clicking the download icon located on the toolbar. |
| appear in the right window. | | | | A window titled “Select Target Module” |
| Double click “Hardware” and two (maybe | | | | should open. Click OK. |
| three) new windows will open. On the left will be | | | | Another window titled “Select Node |
| SIMATIC 300 – (the name of your project). | | | | Address” will open. You should see listed your |
| The window on the right will be the catalog of | | | | node address for the PLC you are working with as |
| parts. | | | | you configured it in a previous step. If not, click |
| Look in the right window, the parts catalog, and click | | | | view and click on whatever node address appears |
| the plus sign beside SIMATIC 300. | | | | and click OK. |
| Click the plus sign beside RACK – 300. Click and | | | | Switch back to SIMATIC manager (by clicking the |
| drag the Rail onto the left window. You will now | | | | tab on the taskbar). |
| see the Slots window appear. This is where we will | | | | Click on Options. Choose Set PG/PC Interface. |
| place our PLC components | | | | Choose PC Adapter (Auto). |
| We will first choose our CPU. Looking at the parts | | | | Click Properties. A new window will open, displaying |
| catalog, in the SIMATIC 300 tree, choose the CPU | | | | either Automatic Bus Profile Detection or Local |
| that you are using. We are using the CPU – 300 | | | | Connection. Click Local Connection and choose |
| so click the plus sign beside that choice. | | | | USB. Now choose Automatic Bus Profile Detection |
| Now look at the front top left of your PLC. This is | | | | and change the address to 30. You can check your |
| where you will find the PLC model. I will use | | | | connection now by clicking Start Network |
| CPU313C-2 DP as an example since this is the model | | | | Detection. If a new window opens displaying |
| PLC that I use. | | | | Network Type = MPI, Transmission Rate = |
| Find this CPU in your parts catalog and click the plus | | | | 187.5kbps, you have established communications |
| sign. You will now see some part numbers. | | | | with your S7-300. Click Close. Click OK. Click |
| Look back at your PLC. Locate the door covering | | | | OK. |
| the MPI port. This will be the bottom left side of | | | | It is now time to start programming. Looking at the |
| the PLC. At the bottom of the door you will find | | | | SIMATIC Manager window, click the plus sign located |
| the part number. The part number for the PLC I | | | | beside SIMATIC 300(1), click the plus sign beside CPU |
| am using as an example is 313-6CF03-0AB0. | | | | 313C-2DP, click the plus sign beside S7 Program(1). |
| Find this part number in the parts catalog. You will | | | | Now click on Blocks and you will see System data |
| notice this is another folder. Open it and you will | | | | and OB1 appear in the right window on your screen. |
| see V2.0 and V2.6. Look back at the PLC, open the | | | | Double click on OB1 and a new window will open |
| door covering the MPI port, and right above the MPI | | | | named Properties – Organization Block |
| port you will see V2.6.3. | | | | Here you can choose how you want to program, in |
| Go back to the parts catalog and click V2.6. Notice | | | | LAD (ladder), STL (statement list), or FBD (function |
| how a slot in the left hand window will highlight | | | | block diagram). Choose which you want to use and |
| green. I believe it will be slot #2. (Slot #1 is | | | | click OK. |
| reserved for power supplies.) This is where you will | | | | Double click OB1 again and the LAD/STL/FBD |
| drag and drop your CPU. (Notice the software will | | | | programming window will open. |
| not let you put the CPU in any other slot but slot | | | | You can now start programming. |