Siemens Simatic S7-400 - High-Dynamic Closed-Loop Positioning with the FM 458-1 DP

Technological Functions of the S7-400
4-11
Automation System S7-400 Configuration and Use
A5E0044271 1-02
4.8 High-dynamic Closed-loop Positioning with the FM 458-1
DP
Introduction
With the FM 458-1 DP application module you can configure high-performance
controlling and technological applications in a SIMATIC S7-400. Together with two
additional plug-in expansion modules, the FM 458-1 DP allows the implementation
of a a large number of high-dynamic applications, especially drive-related
applications.
Functions of the FM 458-1 DP
The FM 458-1 DP provides you with the following functions:
• Torque controls
• Speed controls
• Position and closed-loop position controls
Performance characteristics of the FM 458-1 DP
The FM 458-1 DP has the following performance characteristics:
• Cycle time 0.5 ms typical
• DRAM user memory (16 MB) 12 MB for user programs
• SRAM (256 KB)
• Exchangeable program memory MMC (2, 4, or 8 MB)
• 8 interrupt tasks can be called via 8 digital inputs.
• Profibus DP Interface
• RS-232 interface (V.24)
• LE bus
Configuring the FM 458-1 DP
Control engineering functions can be easily configured using the graphic
configuration interface, CFC (Continuous Function Chart). You can take blocks
from a library comprising approximately 250 function blocks and place them on a
page using simple drag-and-drop. The block I/Os are interconnected by clicking on
an output and an input. For inputs assigned with a fixed value and are not to be
connected, the value is specified in a parameter assignment dialog.
The configuration created in this way is then compiled by CFC, the graphic
configuration interface, and downloaded to the FM 458-1 DP application module.