Hold down the left mouse button and drag the output coil onto the third network. To enter the coil for turning on M0.0: Select the output coil from the bit logic instructions. Click on the? above the contact and enter the address of the timer bit: T33 Press the Return key to enter the address for the contact. Hold down the left mouse button and drag the contact onto the third network. To enter the contact for the timer bit of T33: Select the Normally Open contact from the bit logic instructions. Because the timer is enabled by a Normally Closed contact for M0.0, changing the state of M0.0 from off (0) to on (1) resets the timer (see Figure 1.5). Power flow from this contact turns on the M0.0 memory location. Click on the? above the coil and enter the following address: Q0.0 Press the Return key to enter the address for the coil.Ĥ Figure 1.4: Step 7 Micro/WIN Turn on the Output Network 2 Step-4: Resetting the Timer (NETWORK 3) When the timer reaches the preset value (100) and turns the timer bit on, the contact for T33 turns on. Hold down the left mouse button and drag the coil onto the second network. To enter the instruction for turning on output Q0.0: Double-click the Bit Logic icon to display the bit logic instructions and select the output coil. Enter the following value to be compared with the timer value: 40 Press the Return key to enter the value. Click on the? above the contact and enter the address for the timer value: T33 Press the Return key to enter the timer number and to move the focus to the other value to be compared with the timer value. Hold down the left mouse button and drag the compare instruction onto the second network. Select the >=I instruction (Greater-Than-Or-Equal-To-Integer ). Press enter to finish setting up the timer.ģ Table 1.1: Timer Numbers and Resolutions Table 1.2: Operations of the Timer Instructions Step-3: Turning the Output On (NETWORK 2) When the timer value for T33 is greater than or equal to 40 (40 times 10 milliseconds, or 0.4 seconds), the contact provides power flow to turn on output Q0.0 of the S To enter the Compare instruction (see Figure 1.4): Double-click the Compare icon to display the compare instructions.
Press enter the cursor will go to PT (see blue boxes in Figure 1.2) section (Time Setting). Write the T33 (see green boxes in Figure 1.2) instead of the question marks (?) over the timer box. Drag and drop the TON to network 1 next to M0.0. Figure 1.3: Step 7 Micro/WIN Timer and M0.0 Contact Setting up the timer (see Figure 1.3): Click on timer icon (see red boxes in Figure 1.2) to see all timer commands Choose TON (On-delay timer). Press the enter button to finish contact definition. Write the M0.0 instead of the question marks (?) over the contact. Procedure of using timer is as follow Click on Bit Logic icon to open bit logic commands.
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Start All Programs Simatic Step 7 Micro/WIN V4 XX Step 7 Micro/WIN Figure 1.1: Step 7 Micro/WIN Start Window Open Step 7 Micro/WIN Write a Simple Code in Ladder Networks Compile Your Code Download Your Code to PLC Run PLC to Perform Code Figure 1.2: Steps of Running Your Code on PLCĢ Step-2: How to write a simple program and use a timer in Step 7 Micro/WIN (NETWORK 1) You can check the timer types and properties from Table 1.1 and Table 1.2.
In Figure 1.2 steps of writing and running a program on PLC is demonstrated. After opening the program you will see the window in Figure 1.1. Step-1: How to open Step 7 Micro/WIN You can open Step 7 Micro/WIN from following path for Windows. For example I0.1 defines the first module s 1 st input and Q0.1 defines first module s first output. Inputs will be defined as IX.X, outputs will be defined as QX.X and flags will be defined as MX.X for programming Siemens PLCs.
Programming of S7-200 by using Step 7 Micro/WIN will be introduced in a simple example. 1 STEP 7 MICRO/WIN TUTORIAL Step7 Micro/WIN makes programming of S7-200 easier.
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