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Overview of PLC Siemens

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PLC Siemens is the most famous PLC name in the world. In any factory in any country we meet PLC Siemens. Famous for PLC product lines: Logo, S7-200, S7-1200, S7-300, S7-1500, S7-400 Series

Logo Siemens

Born very early, however up to now the product line of Siemens Logo is still being improved and manufactured. With the advantages of the Siemens Logo that are difficult to replace by any product, it is used by integrators as a control unit of medium and large systems with simple levels of control. In addition, the Siemens Logo is also used as a brain, the main control device for simple control systems in various fields.

+ Simple, compact, solid, stable, durable and beautiful. Meets most of the control feature requirements for small and medium-sized applications.
+ There are 2 main lines of Logo: integrated display and no. Siemens Logo series integrated LCD display screen, text display
+ Simple software and programming language. Can be programmed directly on PLC Logo
+ With the features that Siemens Logo can perform, it comes with a very reasonable price
+ The Siemens logo supports expanding and upgrading features through expansion modules with a variety of features. Up to now, there are a number of Siemens Logo lines that have integrated Web.
+ Programming Logo through the software with LOGO! Soft Comfort

Siemens S7-200

Siemens ranks S7-200 as small PLCs (Micro PLCs). However, it does provide enough capabilities for a wide variety of control applications. The S7-200 PLC fully supports commands such as logic, counters, timers, complex arithmetic operations, and communication functions.

The programming software for S7-200 PLC is Step7-Micro / Win, the latest version is V4.0, the updates are SP9 and can be installed on Windows7, Windows10. In addition, Siemens also provides AddOn package which provides extensive library such as communication functions with Modbus, ..

Siemens S7-1200

S7-1200 PLC is the S7-200 series PLC, belongs to small PLC series, used for machines, small lines or small systems, equipped with full functions such as communication, analog, HSC, PWM / PTO,… Fully functional, simple to program and cheap, so the S7-1200 has a high popularity and is used a lot in industry.

Programming software for the S7-1200 PLC is TIA, this is a new Siemens package that supports programming for PLCs (S7-1200. S7-300, S7-400), HMI. However only certain product types are supported with this software. S7-1200 only supports LAD programming language, not STL.

Siemens S7-300

The S7-300 PLC is a mid-size PLC, with faster computation and management of more I / O numbers, making it suitable for medium and large applications, often used in lines, medium and large systems. Because the price is higher, the S7-300 PLC is only suitable for large applications with higher costs.

The S7-300 PLC is a completely different line from the S7-200. It and S7-400 are mainly used for current SCADA systems. S7-300 supports standard Siemens network architectures including Ethernet, Profibus-DP, AS-i, Serial / Modbus, … allowing users to build network structures to meet large systems according to special needs. distributed system.

Siemens S7-1500

S7-1500 PLC is a more modern version of S7-300 PLC, with powerful functions, high-speed CPU, large I / O scalability, supports many features of OPC, Web server, … so The S7-1500 PLC can be an alternative to the S7-300 in some cases where it is necessary to exploit the strengths of the new features.

Siemens S7-400

S7-400 PLC is considered to be the most powerful PLC series, with Hot-Standby structure for hot redundancy of CPU running in parallel, the ability to manage huge quantity of I / O, high speed of computation and processing. so the S7-400 PLC is suitable for DCS systems controlling large plants and chains. However, the cost of the S7-400 series is also very high, so the use of this PLC series is also less than the lower series.

The S7-400 PLC is an extension of the S7-300 PLC with larger memory, larger number of I / O, more powerful processor, and more to allow operation with much larger systems than the S7. -300. S7-400 is designed to work with some of the standards designed by Siemens such as PCS7, CEMAT, etc. that the S7-300 does not have (eg message building blocks).


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