Siemens Drives & PLCs

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1 Automation System S7-300: Getting Started CPU 31xC: Commissioning Introduction 1 Preparation 2 SIMATIC S7-300 Automation System S7-300: Getting Started CPU 31xC: Commissioning Learning units 3 Further Information 4 Getting Started Siemens Drives & PLCs 08/2011 A5E

2 Legal information Legal information Warning notice system This manual contains notices you have to observe in order to ensure your personal safety, as well as to prevent damage to property. The notices referring to your personal safety are highlighted in the manual by a safety alert symbol, notices referring only to property damage have no safety alert symbol. These notices shown below are graded according to the degree of danger. DANGER indicates that death or severe personal injury will result if proper precautions are not taken. WARNING indicates that death or severe personal injury may result if proper precautions are not taken. CAUTION with a safety alert symbol, indicates that minor personal injury can result if proper precautions are not taken. CAUTION without a safety alert symbol, indicates that property damage can result if proper precautions are not taken. NOTICE indicates that an unintended result or situation can occur if the relevant information is not taken into account. If more than one degree of danger is present, the warning notice representing the highest degree of danger will be used. A notice warning of injury to persons with a safety alert symbol may also include a warning relating to property damage. Qualified Personnel The product/system described in this documentation may be operated only by personnel qualified for the specific task in accordance with the relevant documentation, in particular its warning notices and safety instructions. Qualified personnel are those who, based on their training and experience, are capable of identifying risks and avoiding potential hazards when working with these products/systems. Proper use of Siemens products Note the following: WARNING Siemens products may only be used for the applications described in the catalog and in the relevant technical documentation. If products and components from other manufacturers are used, these must be recommended or approved by Siemens. Proper transport, storage, installation, assembly, commissioning, operation and maintenance are required to ensure that the products operate safely and without any problems. The permissible ambient conditions must be complied with. The information in the relevant documentation must be observed. Trademarks All names identified by are registered trademarks of Siemens AG. The remaining trademarks in this publication may be trademarks whose use by third parties for their own purposes could violate the rights of the owner. Disclaimer of Liability We have reviewed the contents of this publication to ensure consistency with the hardware and software described. Since variance cannot be precluded entirely, we cannot guarantee full consistency. However, the information in this publication is reviewed regularly and any necessary corrections are included in subsequent editions. Siemens AG Industry Sector Postfach NÜRNBERG GERMANY A5E P 09/2011 Copyright Siemens AG Technical data subject to change

3 Table of contents 1 Introduction Preparation Learning units Step: Installing the mounting rail and modules Step: Wiring modules Step: Commissioning hardware Step: Programming the circuit Step: Configuring hardware Step: Trial run Further Information Automation Siemens System S7-300: Getting Started CPU 31xC: Drives Commissioning & PLCs Getting Started, 08/2011, A5E

4 Table of contents Automation System S7-300: Getting Started CPU 31xC: Commissioning 4 Getting Started, 08/2011, A5E

5 Introduction 1 Contents of this Getting Started Manual Using a specific example, this "Getting started" manual guides you through six commissioning steps to implement a functional application. While working through the example, you will learn the basic hardware and software functions of your CPU 31xC. This process will take one to two hours, depending on your experience. Automation Siemens System S7-300: Getting Started CPU 31xC: Drives Commissioning & PLCs Getting Started, 08/2011, A5E

6 Introduction Automation System S7-300: Getting Started CPU 31xC: Commissioning 6 Getting Started, 08/2011, A5E

7 Preparation 2 Scope These instructions apply to the following CPUs: CPU SIMATIC Micro Memory Card required for operation? 312C yes V C yes V C-2 PtP yes V C-2 DP yes V C-2 PtP yes V C-2 DP yes V C-2 PN/DP yes V3.3 As of firmware version The order number can be found in the manuals, e.g. the operating instructions CPU 31xC and CPU 31x: Installation ( Prerequisites You need to have a basic understanding of electronics/electrical engineering. You must also be familiar with the Microsoft Windows operating system. WARNING Operation of an S7-300 as part of plants or systems is subject to special rules and regulations, which depend on its field of application. Please make sure that you adhere to the applicable safety and accident prevention regulations, for example IEC 204 (emergency stop systems). You risk severe injury, or damage to machines and equipment if you ignore these regulations. Automation Siemens System S7-300: Getting Started CPU 31xC: Drives Commissioning & PLCs Getting Started, 08/2011, A5E

8 Preparation Material and tools required Quantity Item Order number (Siemens) 1 Mounting rail e.g. 6ES7390-1AE80-0AA0 1 Power supply PS 307 (PS) e.g. 6ES7307-1EA01-0AA0 1 CPU 31xC, e.g. CPU 313C e.g. 6ES7313-5BG04-0AB0 1 SIMATIC Micro Memory Card e.g. 6ES7953-8LL20-0AA0 Note: The SIMATIC Micro Memory Card is required for operation of certain CPUs (see Scope) pin front connector with screw contacts 6ES7392-1AM00-0AA0 1 Programming device (PG) with MPI interface and Depending on configuration STEP 7 software as of V5.5 + SP1 or STEP 7 as of V5.3 + SP2 with HSP 203 installed and PG cable or PC with suitable interface card X m PROFIBUS DP cable with bus connectors Depending on implementation Various M6 nuts and bolts (length depending on specific commonly available installation) with suitable screwdriver/wrench 1 Screwdriver with 3.5 mm wide blade commonly available 1 Screwdriver with 4.5 mm wide blade commonly available 1 Side cutter and cable stripper commonly available 1 Crimp tool commonly available X m Cable with 10 mm 2 cross-section for grounding the commonly available mounting rail, with cable lug suitable for M6, length to suit local requirements Approx. Flexible wire with 1 mm 2 cross-section with suitable commonly available 2 m wire-end ferrules with insulation collar, length 6 mm X m 3-core power supply cable (230/120 V AC) with commonly available "Schuko" plug, length to suit local requirements and suitable wire-end ferrules 2 Single-pole ON switch (24 V) commonly available Automation System S7-300: Getting Started CPU 31xC: Commissioning 8 Getting Started, 08/2011, A5E

9 Preparation Layout of the example Power supply ON/OFF Mode selector Mounting rail Programming device with STEP 7 software PG cable Connecting cable Clamp for strain relief Figure 2-1 Overview of sample layout Functionality of the example Output A must only switch (i.e. LED A lights up) when button E and button E are pressed. Automation Siemens System S7-300: Getting Started CPU 31xC: Drives Commissioning & PLCs Getting Started, 08/2011, A5E

10 Preparation Automation System S7-300: Getting Started CPU 31xC: Commissioning 10 Getting Started, 08/2011, A5E

11 Learning units Step: Installing the mounting rail and modules Installation sequence From left to right: Power supply PS CPU 313C. The configuration diagram gives you an overview of the overall configuration. Installing and grounding the mounting rail 1. Screw on the mounting rail (screw size: M6). Make sure to maintain a minimum clearance of 40 mm above and below the mounting rail. When mounting it on a grounded metallic panel or on a grounded device mounting panel made of steel sheet, make sure you have a low impedance connection between the mounting rail and the mounting surface. 2. Connect the rail to the protective conductor. An M6 screw is provided on the rail for this purpose. Minimum cross-section from the cable to the protective conductor: at least 10 mm 2. Automation Siemens System S7-300: Getting Started CPU 31xC: Drives Commissioning & PLCs Getting Started, 08/2011, A5E

12 Learning units Step: Installing the mounting rail and modules Installing modules on the mounting rail 1. Insert the power supply module. Slide it to the left as far as the grounding screw of the mounting rail. Fasten the power supply module. 2. Hang in the CPU (1). 3. Slide it as far as the left-hand module (2). 4. Swivel down the CPU (3). 5. Bolt the CPU tight, applying a torque of between 0.8 and 1.1 Nm. 6. Insert a SIMATIC Micro Memory Card into the CPU (4). Delete the content of a SIMATIC Micro Memory Card with unknown content before you use it in the programming device. Automation System S7-300: Getting Started CPU 31xC: Commissioning 12 Getting Started, 08/2011, A5E

13 Learning units Step: Wiring modules Step: Wiring modules WARNING Ensure the S7-300 is completely disconnected before wiring! You may come into contact with live wires if the S7-300 is connected to the power supply. Wiring the power supply and the CPU 1. Open the front panel covers of the power supply module and CPU. 2. Unscrew the strain relief clamp on the power supply module. 3. Strip the power cable. 4. Crimp wire-end ferrules to the ends of stranded cables. 5. Connect to the power supply. 6. Screw the strain-relief assembly tight. 7. Insert two short connecting cables between the power supply and the CPU. 8. Fasten the CPU. Wiring the front connectors of the DI and DO 1. Open the front right-hand panel of the CPU 313C. 2. Place the front connector into wiring position. You do this by pushing a front connector into the CPU until it snaps into position. In this position, the front connector still protrudes from the CPU. In the wiring position a wired front connector has no contact with the module. 3. Remove 6 mm of the insulation from the ends of the wires that go into the front connector. Attach cable end sleeves to these ends. 4. Wire the front connector (DI side) as follows: Terminal 1: L+ of the power supply Terminal 3: Button 1 Terminal 4: Button 2 Terminal 20: M of the power supply 5. Wire the front connector (DO side) as follows: Terminals 21 and 31: L+ of the power supply Terminal 30: M of the power supply 6. Wire the free cable ends of the button with L+ of the power supply. 7. Lead the wires downwards out of the front connector. 8. Secure the front connector with the screws (this establishes contact with the module). 9. Close the front panel covers of the power supply module and the front panel of the CPU. Automation Siemens System S7-300: Getting Started CPU 31xC: Drives Commissioning & PLCs Getting Started, 08/2011, A5E

14 Learning units Step: Commissioning hardware Step: Commissioning hardware Procedure 1. Use the PG cable to connect the programming device to the CPU. When using a cable with PROFIBUS connectors, remember to switch on the integrated terminating resistors. Close the front panel cover of the CPU, then set the mode selector switch on the CPU to STOP. 2. Connect the mains cable, then switch on the power supply module PS 307. The DC24V LED on the power supply is lit. All the LEDs on the CPU light up briefly; the SF LED and the DC5V LED stay lit. The STOP LED then flashes slowly to indicate a CPU memory reset. 3. Perform a CPU memory reset: Turn the mode switch to MRES. Hold the mode selector at this position until the STOP LED lights up for the second time and then remains lit (approx. 3 seconds). Then release it. You must press the mode switch back to MRES within 3 s. The STOP LED begins to flash rapidly and the CPU performs a reset. You can now release the mode switch. The CPU has completed the memory reset when the STOP LED remains permanently lit again. 4. Start your programming device, then run SIMATIC Manager from your Windows Desktop. A window opens with SIMATIC Manager. 5. Select button 1. The LED of I124.1 lights up. No DO LED lights up. 6. Select button 2. The LED of I124.2 lights up. No DO LED lights up. Automation System S7-300: Getting Started CPU 31xC: Commissioning 14 Getting Started, 08/2011, A5E

15 Learning units Step: Programming the circuit Step: Programming the circuit Procedure 1. Follow the instructions of the STEP 7 "New Project" wizard on the programming device and set up a new project with the following data: CPU type: CPU 313C Block to be created: OB 1 Project name: S7_Pro1 A window, divided into two parts, opens with the title S7_Pro Double-click the OB1 icon in the right-hand part of the window. The editor for editing the OB 1 block opens. 3. In the "View" menu, select "LAD" to change to the ladder logic programming language. At the bottom of the left-hand window, a current path is displayed in network Carefully click on the horizontal line representing the current path. The line is highlighted. 5. On the toolbar, click twice on the icon (normally-open contact) and then once on the ( ) icon (coil). The icons are inserted into the current path. 6. Click on the red question mark for the left-hand normally- open contact in the current path. The normally-open contact is highlighted and the question mark is replaced with a text input box containing the cursor. 7. Enter I124.1 and press Return. The left-hand normally-open contact is now called I Automation Siemens System S7-300: Getting Started CPU 31xC: Drives Commissioning & PLCs Getting Started, 08/2011, A5E

16 Learning units Step: Programming the circuit 8. Label the right button in the same way with I124.2 and the coil with Q Close the editor and click Yes when you are prompted to save. The editor is closed and OB 1 is saved. Automation System S7-300: Getting Started CPU 31xC: Commissioning 16 Getting Started, 08/2011, A5E

17 Learning units Step: Configuring hardware Step: Configuring hardware Procedure 1. In SIMATIC Manager, click on SIMATIC 300 Station in the left-hand part of the window. The Hardware and CPU 313C icons appear in the right-hand section of the window. 2. Double-click the Hardware icon in the right-hand part of the window. The editor for editing the hardware opens. 3. If the catalog is not shown in the right-hand section of the window, you can activate the catalog by selecting Catalog in the View menu. 4. Navigate to CPU 313C via SIMATIC 300 and CPU Drag-and-drop the CPU 313C into slot 2 (window, top or bottom left). Note You can see the order number in the hardware catalog if you click on a CPU. The order number of the selected CPU then appears in the box below the hardware catalog. Multiple order numbers may be listed in your hardware catalog in the CPU 313C folder (see figure). 6. Check whether the order number displayed for slot 2 in the bottom left-hand section of the window corresponds to the order number on your CPU. Increase the width of the order number column so you can see the complete number. If it does: Skip to the next step. If it does not: In the catalog, navigate to CPU 313C via CPU-300. Replace the CPU in slot 2 by dragging and dropping the CPU with the correct order number from the catalog. Automation Siemens System S7-300: Getting Started CPU 31xC: Drives Commissioning & PLCs Getting Started, 08/2011, A5E

18 Learning units Step: Trial run 7. Perform steps 3 and 4 for the power supply module PS 307 too. Insert the PS 307 into slot Go to the Station menu and select Save and compile. The hardware configuration is compiled and saved. 9. Close the editor. The editor is closed Step: Trial run Procedure 1. Use the SIMATIC 300 station and CPU 313C to navigate to the S7 program. In SIMATIC Manager, click on Blocks in the right-hand section of the window. "Blocks" is then highlighted. 2. Select "Download" from the "PLC" menu to transfer the program and hardware configuration to the CPU. Confirm all windows with "Yes". The program and configuration are downloaded from the programming device to the CPU. The program is now stored on the SIMATIC Micro Memory Card (in the load memory), where it is unaffected by power failures and resets. 3. Set the CPU's mode switch to RUN. The STOP LED is switched off. The RUN LED starts to flash and then assumes a continuous signal. 4. Press each of the buttons alternately. The LEDs of inputs I124.1 and I124.2 light up alternately. The LED of output Q124.0 is not lit. 5. Press both buttons simultaneously. The LEDs of inputs I124.1 and I124.2 light up simultaneously. The LED of output Q124.0 is lit. This would switch on a connected actuator or indicator. Automation System S7-300: Getting Started CPU 31xC: Commissioning 18 Getting Started, 08/2011, A5E

19 Further Information 4 Diagnostics/Correction of Errors Wrong operation, faulty wiring or a faulty hardware configuration may cause errors which the CPU, CP or IE/PB-Link indicate with the SF group error LED after CPU memory reset. For information on how to diagnose such errors and alarms, please refer to the operating instructions, CPU 31xC and CPU 31x: Installation ( and Programming SIMATIC with STEP ( Manuals containing further information For more in-depth Getting Started information, we recommend Getting Started and Exercises with STEP 7 ( Service & Support on the Internet In addition to our documentation, we offer a comprehensive knowledge base on the Internet ( There you can find: A newsletter containing the latest information on your Siemens products. The documents you need using the search engine in Service & Support. The bulletin board, a worldwide knowledge exchange for users and experts. Your local contact for Automation & Drives in our contact database. Information about on-site services, repairs and spare parts. You will find much more under "Services". Automation Siemens System S7-300: Getting Started CPU 31xC: Drives Commissioning & PLCs Getting Started, 08/2011, A5E

20 Further Information Automation System S7-300: Getting Started CPU 31xC: Commissioning 20 Getting Started, 08/2011, A5E