Siemo Service, Chennai
Krishnapuram, Chennai, Tamil Nadu
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Automated PLC Controller

Built in with high precision components we present our clients with our sturdy and highly efficient range of Automated Programmable Logic Controller that are easy-to-use, flexible in operation and cost-effective. This Programmable Logic Controller is available with a compact operator interface panel that helps in all its operations smoothly.

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We are considered as a specialist in offering the best quality range of PLC Controller  - S7-400H. It processes with high restart costs, expensive down times, little supervision, and few maintenance options.



  • Fault-tolerant automation system with redundant design
  • For applications with high fail-safety requirements
  • Processes with high restart costs, expensive down times, little supervision, and few maintenance options
  • Redundant central functions
  • Increases availability of I/O: switched I/O configuration.
  • Also possible to use I/Os with standard availability: single sided configuration
  • Hot stand-by: automatic reaction-free switching to the standby unit in the event of a fault
  • Configuration with two separate or one divided central rack.
  • Connection of switched I/O via redundant PROFIBUS DP

Additional Information:
  • Item Code: S7-400H
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This instrument is compact and highly powerful PLC Controller - S7-200 that is fast, and comes with easy-to-operate software and hardware. This serves as the great choice for open-loop control in the lower performance range. This model S7-200 delivers consistently economical solutions and millions of applications around the world in both stand-alone and networked solutions.

The entire system family features:
  • Optimum Modularity
  • Powerful Performance
  • Open Communications

Open communication

  • PPI protocol system bus for trouble-free networking
  • Fast connection to PROFIBUS using the slave module
  • Connection to Industrial Ethernet via the Ethernet module
  • Powerful connection to AS-Interface using the master module
  • Built-in RS 485 interface with data transmission rates up to 187.5 kbit/s
  • S7-200 PC Access OPC Server for simple connection to the PC environment
  • Freeport mode programmable for user specific protocols for any peripheral devices
  • Internet connectivity, e-mail, HTTP, and FTP server functionality using the Internet module

Powerful performance:

  • Large program and data memory
  • Basic and advanced functionality in all CPU models
  • Small and compact ideal for any applications where space is tight
  • Easy-to-use STEP 7-Micro/WIN engineering software ideal for both beginners and experts
  • Outstanding real-time response being in total command of the entire process at any time means increased quality, efficiency and safety

Optimal modularity:

  • Systems engineering
  • 5 distinct CPUs in the performance range with comprehensive basic functionality and integrated Freeport communications interface
  • A wide range of expansion modules for various functions:
  • Digital/analog expansions, scalable to specific requirements
  • PROFIBUS communication as a slave
  • AS-Interface communication as a master
  • Exact temperature measurement
  • Positioning
  • Remote diagnostics
  • SIWAREX MS weighing module
  • Ethernet/Internet communications

Additional Information:
  • Item Code: S7-200
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Our company is engaged in offering a comprehensive range of PLC Controller. The consistently modular design of LOGO! makes it extremely flexible. A wide range of modules allows individual expansion of LOGO! to 24 digital inputs, 16 digital outputs, 8 analog inputs and 2 analog outputs! Communications modules are also available for AS-Interface and KNX (Instabus network for building automation). Now it is also possible to use the analog output module to solve simple closed-loop control tasks. Heating and cooling systems can be designed with the RTD PT100 module using special functions for PI control, ramp response and analog multiplexing.




  • Different voltages, i. e. 12 V DC, 24 V AC / DC, 115 / 240 V AC / DC – Can be used for a wide range of applications
  • Automatic changeover for configured daylight saving time – Reduces maintenance overhead
  • Password protection – Protects your engineering IP
  • 38 integrated, pre-tested functions – No additional devices, such as elapsed time counter, are required
  • Linking of 200 functions is possible – Extensive applications can be implemented without restrictions
  • Eight digital inputs (incl. four AIs at 12 / 24 V DC) and four digital outputs on board
  • Flexibly expandable up to 24 DIs, 16 DOs, 8 AIs and 2 AOs – Protects original investment – Suitable for a wide variety of applications
  • Display of message texts, action items and current values as well as direct modification of the values on the display (except for Pure versions)
  • Retentive data memory – Protects current values against loss in the event of a power failure
  • Software LOGO! Soft Comfort V6 for user- friendly generation of control programs on PC; suitable for a variety of operating systems, such as Windows 95/98, NT 4.0, Me, 2000, XP, Vista, MAC OS X 10.4 with J2SE 1.5.0 and SUSE LINUX 10.0.
  • Connection facility for remote text display on all 0BA6 base modules


  • Controllable backlight and multi-language character sets
  • Supports 12 or 16 standard characters per line
  • Display of up to 50 messages on the LCD and/or the external TD
  • Switch between 2 screens or scroll up to 32 characters on any or all lines for each message
  • Display of up to 4 bar graphs and 4 I/O statuses per message/per character set
  • Password protection of RUN/STOP options on the TD

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In the wake of the ever rising demand for reliable products, we are engaged in offering a wide assortment of PLC Controller S7-400F-FH.



  • Fail safe automation system for plants with increased safety requirements
  • Complies with safety requirements to SIL 3 in accordance with IEC 61508, AK6 in accordance with DIN V 19250 and Cat. 4 in accordance with EN 954-1
  • If required, also fault tolerant through redundant design
  • Without additional wiring of the safety-related I/O:
  • Safety-relevant communication via Profibus DP with Profi safe profile
  • Based on S7-400H and ET 200M with fail-safe modules
  • Standard modules for non-safety-related applications can also be used in the automation system
  • Isolation module for joint use of fail-safe and standard modules in safety mode in one ET 200M

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Our clients can avail form us the most sought after range of PLC Controller - S7-400. It has optimal communication and networking options.


  • The power PLC for the mid to high-end performance ranges.
  • The solution for even the most demanding tasks.
  • With a comprehensive range of modules and performance graded CPU for optimal adaptation to the automation task.
  • Flexible in use through simple implementation of distributed structures; user-friendly connections.
  • Optimal communication and networking options.
  • User-friendly handling and uncomplicated design without a fan
  • Can be expanded without problems when the tasks increase.


  • Multicomputing: Simultaneous operation of several CPUs in one S7-400 central controller. Multicomputing distributes the overall performance power of an S7-400. For example, complex tasks can be divided into technologies such as open-loop control, computing or communication, and assigned to different CPUs. And every CPU can be assigned its own local I/O.
  • Modularity: The powerful backplane bus of the S7-400 and the communication interfaces that can be connected direct to the CPU enable high-performance operation of a host of communication lines. This enables, for example, division into one communication path for HMI and programming tasks, one for high-performance and equidistant motion control components, and one for a "normal" I/O fieldbus. Additionally required connections to MES/ERP systems or the Internet can also be implemented.
  • Engineering and diagnostics: The S7-400 is configured and programmed extremely efficiently together with the SIMATIC Engineering Tools particularly in the case of extensive automation solutions with a high engineering component. For this purpose, high-level languages such as SCL and graphical engineering tools for sequential controls, state graph programs and technology-oriented diagrams are available.

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Siemo Service, Chennai

Thillairajan Alaganchetty (Partner)
No. 4, Suriyaprakash Street Krishnapuram, Ambattur
Chennai - 600053
Tamil Nadu, India
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