Solutions with parameterizable S7-function modules

Function modules (FMs) are intelligent modules for the SIMATIC S7-200/ S7-300/ S7-400 and C7. They execute technological tasks independently and, consequently, relieve the load on the CPU.

Function modules are used for applications demanding ultimate precision and dynamic response. STEP 7 and STEP 7-Micro/WIN provide a series of configuration tools for parameterizing FMs. All parameterization and commissioning procedures are performed on easy-to-use interactive screen forms. In the interest of integration, there is great similarity between the FMs of the S7-300 and S7-400 series in the areas of functionality and parameterization. These FMs mostly differ only in their performance profile. User programs can be used both in the S7-300 and in the S7-400.

The function modules of the S7-300 may be used in the ET 200M distributed I/O system

Advantages		Typical areas of application
High degree of accuracy and dynamic response Specialized and universal modules with a wide range of functions CPU is not involved since the functionality is stored in the firmware of each module Quick reaction times (deterministic dynamic response) Engineering with configuring tool, integrated into STEP 7		Wood, glass, stone and metal processing Packaging machines Presses General machine manufacturing Machine tools Textile machines Rubber and plastic industry Plants

				Hardware	Function
X				SM 338	Position detection with SSI encoders
			X	EM 253	Positioning using pulse/direction interface
	X			FM 352/452	Electronic cam controllers
X				FM 350-1/450-1	1- or 2-channel counting up to 500 kHz
X				FM 350-2	8-channel counting up to 20 kHz
			X	FM 351/451	Controlled positioning using rapid traverse/creep feed
		X		FM 355/455	Controller modules for universal applications
		X		FM 355-2	Temperature controller with integrated online self-optimization
			X	FM 453	Positioning with stepper motors and servomotors
			X	IM 174	Isochronous PROFIBUS module for Motion Control PLCs

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