Siemens Totally Integrated Automation Portal

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TIA Portal

Siemens PLC Programming This chapter covers the following topics (PLC Programming Concepts, Basic Ladder Diagram Programming, and Basic Function Block Diagram Programming ). Completion of this chapter will help you learn important PLC'S terms and develop an understanding of PLC programming concepts.

Chapter -18

• Siemens Totally Integrated Automation Portal (TIA Portal) software is used in all phases of automation system design, operation, and maintenance.

TIA

• TIA Portal combines the software editors needed for these various tasks in one engineering tool.

• The user can choose between the portal view which guides the user through each engineering step or the project view which offers fast access to all the relevant tools.

• The portal view is a good place to start for a new user or anyone who wants to proceed with the development of a project in a logical sequence.

• In portal view, the available tasks are clearly identified such as
  
• Create new project
  
• Configure a device or Write PLC program
  

• Selecting Configure a device allows the user to quickly and easily set up a new device.

• Device types are easily located in a searchable hardware catalog.

• Configuration and networking for the entire project are performed in the device and network views which display graphical representations of devices and allows network connections to be created using a simple drag and drop approach.

• Configuration is further simplified by using TIA Portal to detect connected devices.

• For example the graphic shows a TIA Portal project view after an S7-1200 PLC has been detected.

TIA Portal

• In this graphic a picture of the S7-1200 PLC is superimposed on the TIA Portal screen to show how realistic the device image is.

SIMATIC STEP 7 Engineering Software

• Preparing a PLC for use in an automation system requires configuration of devices and networks and programming of the PLC and related devices.

• For Siemens PLC'S the following engineering software is used to perform these functions.

• S7-200 PLC'S require STEP 7 Micro WIN which is not available in the TIA Portal.

• S7-300 and S7-400 PLC'S require STEP 7 Professional TIA Portal or a version of STEP 7 Professional which is not in TIA Portal.

• S7-1200 PLC'S require STEP 7 Basic TIA Portal or STEP7 Professional TIA Portal.

• S7-1500 PLC'S require STEP 7 Professional TIA Portal.

• STEP 7 engineering software runs on a personal computer (PC) that has a Microsoft Windows operating system.

PC

• Siemens sells a variety of industrial PCs that can be used as programming devices.

• For added convenience the SIMATIC Field PG comes with pre-installed SIMATIC TIA Portal engineering software and is optimized for mobile configuration, commissioning, servicing and maintenance of an automation system.

SIMATIC STEP 7 Basic (TIA Portal)

• STEP 7 Basic (IA Portal) is used for the configuration and programming of S7-1200 PLC'S and related devices.
  
  
  

• This can also be done using STEP 7 Professional TIA Portal however STEP 7 Basic is a more economical approach when other PLC models are not being used.

• STEP 7 Basic supports the following IEC 61131 programming languages Ladder diagram (LAD) shown in the graphic is a graphical programming language originally derived from the diagrams used in electromechanical control circuits but which has been expanded to include much more advanced capabilities. 

• Function block diagram (FBD) is a graphical programming language similar in capabilities to ladder diagram programming.
  
  
• Structured text is a high-level programming language that is also known as structured control language (SCL).
  
  
• SCL is particularly suitable for the programming of complex algorithms and arithmetic functions.

• STEP 7 Basic allows program elements to be dragged and dropped into the program and the logical arrangements of these elements to be modified in the same way.

• As shown in the graphic a user program for an S7- 1200 PLC can include a full range of instructions such as Boolean logic, counting, timing, comparisons, math, and much more.

• In addition commonly used instructions can be easily saved as favorites for convenience.

SIMATIC STEP7 Professional (TIA Portal)

• STEP 7 Professional TIA Portal is used for the configuration and programming of S7-300, S7-400, S7-1200, and S7-1500 and related devices.

Simatic Step7 controllers

• Because S7-300 and S7-400 PLC'S were developed prior to the introduction TIA Portal software a version of STEP 7 Professional separate from TIA Portal is also available for use with these PLC'S.

• In addition to the LAD, FBD, and SCL programming languages included in STEP 7 Basic, STEP 7 Professional also includes the following IEC61131 programming languages.
  
  
• Statement list (STL) is a low-level text-based programming language.
  
  
• Statement list is also known as Instruction list (IL).

• Sequential function chart (SFC) is a graphical programming language included in STEP 7 Professional as S7-Graph.
  
  
• In S7-Graph steps are shown in a sequence making it easy to see the order in which events will occur.

• STEP 7 Professional also includes S7- PLCSIM software which simulates a controller for functional testing of user blocks and programs on the programming device.

Chapter 19 we will discuss about (Modular Programming , Program blocks , CPU memory , Data types ) Topics.

SIEMENS PLC Class for Beginners

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