Technological Functions of the S7-400
4-3
Automation System S7-400 Configuration and Use
A5E0044271 1-02
4.2 Function Modules - the Specialists
Introduction
Function modules enable you to find fast solutions for complex technological tasks.
The function modules use the same address ranges and are configured in the
same way as signal modules using STEP 7. Function modules are offered for the
following application areas:
• Counting and frequency measurement
• Positioning
• Controlling
Counting and Frequency Measurement
The following function module is available for counting and frequency
measurement tasks:
• FM 450 counter module for fast counting up to 500 kHz cut-off frequency,
2-channel
Positioning
The following function modules are available for positioning tasks depending on the
application:
• FM 451 rapid/creep positioning, 3-channel
• FM 452 electronic cam controller, 1-channel
• FM 453 positioning with stepping motors, 3-channel
• FM 454 positioning with servomotors, 3-channel
• FM 458-1 DP high-dynamic closed-loop positioning
Controlling
The following function module is available for controlling tasks:
• FM 455 with 16 channels
Access to Function Modules
Function modules are accessed via function blocks that are called from the user
program.
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