Overview

• The micro PLC that offers maximum automation at minimum cost.
• Extremely simple installation, programming and operation.
• Large-scale integration, space-saving, powerful.
• Can be used both for simple controls and for complex automation tasks.
• All CPUs can be used in stand-alone mode, in networks and within distributed structures.
• Suitable for applications where programmable controllers would not have been economically viable in the past.
• With outstanding real-time performance and powerful communication options (PPI, PROFIBUS DP, AS-Interface)

Catalog ST 70:

You can also find information about SIMATIC S7-200 in Catalog ST 70:

http://www.siemens.com/automation/salesmaterial-as/catalog/en/st70k2_e.pdf

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Application

The SIMATIC S7-200 is the micro PLC for open-loop control and closed-loop control tasks in machine and plant construction. It combines the greatest possible automation effect with the lowest costs.

SIMATIC S7-200 applications range from replacing relays and contactors to handling complex automation tasks in standalone mode, in networks and within distributed configurations.

To save costs, the S7-200 is increasingly being employed in areas that previously required special electronics.

Applications include:

• Baling presses
• Plaster and cement mixers
• Ventilation plants
• Centralized/flange lubricating systems
• Woodworking machinery
• Gate controls
• Hydraulic lifts
• Conveyor systems
• Food and beverage industry
• Laboratories
• Modem applications (remote monitoring and maintenance)
• Electrical installations

Design

The SIMATIC S7-200 family consists of the following modules:

• 5 basic devices with graded performances in different versions.
• 15 different digital and analog expansion modules.
• 2 communications processors for connection to PROFIBUS and AS Interface.

Mechanical features

• Rugged, compact plastic housing.
• Easily accessible connection and control elements, protected by front flaps.
• CPU 224 and higher: Removable connection terminals, also for digital expansion modules.

Equipment features

• International standards: SIMATIC S7-200 complies with the standards according to VDE, UL, CSA and FM (Class I, Category 2; Danger zone groups A, B, C and D, T4A). The quality management system used during production is certified according to ISO 9001.

Communication

The SIMATIC S7-200 provides various possibilities for communication:

• Communication interface: Can be operated in PPI slave, MPI slave and in the freely-programmable interface mode.
• Connection to AS-Interface: As master via CP 242-2 communications processor.
• Connection to PROFIBUS DP as slave: Via PROFIBUS-EM 277.

PPI network

PPI is the communication system integrated in every S7-200 CPU. Connections for programming, operation or monitoring can be established over a common two-wire cable. The CPUs can communicate simultaneously with several CPUs, TDs or OPs. Data transmission rates 9.6, 19.2 and 187.5 Kbit/s.

The following can be connected:

• Programming devices: Field PG, Power PG.
• PCs (AT-compatible), via PC/PPI cable.
• TD 200 Text Display, TP070 Touch Panel; SIMATIC Operator Panels.
• SIMATIC S7-200: Max. 31 S7-200 PLCs on a common data line to a PG, PC, TD 200 or OP. Direct data exchange between S7-200 PLCs (in each case as master) and NETR and NETW

Communication in PPI mode

MPI network

All CPUs can be connected to an MPI network over the integral interface (19.2/187.5 Kbit/s) and thus communicate with SIMATIC S7-300/S7-400. The S7-200 CPUs are slaves on the network and cannot communicate with each other.