Siemens SIMATIC FM 351 - Setup for Controlled Positioning with an FM 351

Product Overview
1-4
FM 351 Positioning Module
C79000-G7076-C351-02
1.3 Setup for Controlled Positioning with an FM 351
Control Circuit
Figure 1-2 illustrates the components of a controlled positioning setup with
rapid/creep speed drives.
Safety
device
Power supply
Mechanical
transmission
elements
CPU
PC/PG
EMERGENCY
STOP switch
Power unit
Processing
stations
Hardware
limit switch
M
Encoders
Motion
FM 351
Positioning
Module
Motor
Configuration package with
parameter assignment user
interface, blocks and manual
Figure 1-2 Controlled Positioning
Power Unit and Safety Device
The power unit (for example a contactor combination) is activated via the digital
outputs of the FM 351. The FM 351 has four control modes (see Section 8.3, page
8-6).
If the safety device responds, (EMERGENCY OFF switch or hardware limit
switch), the power unit turns off the motor.
Motor
The motor is controlled by the power unit and drives the axis.