User Manual

Easy Book
Manual, 03/2014, A5E02486774-AF
203
Motion control is easy
10
The CPU provides motion control functionality for the operation of stepper motors and servo
motors with pulse interface. The motion control functionality takes over the control and
monitoring of the drives.
● The "Axis" technology object configures the mechanical drive data, drive interface,
dynamic parameters, and other drive properties.
● You configure the pulse and direction outputs of the CPU for controlling the drive.
● Your user program uses the motion control instructions to control the axis and to initiate
motion tasks.
● Use the PROFINET interface to establish the online connection between the CPU and the
programming device. In addition to the online functions of the CPU, additional
commissioning and diagnostic functions are available for motion control.
Note
Changes that you make to the motion control configuration and download in RUN mode
do no
t take effect until the CPU transitions from STOP to RUN mode.
①
PROFINET
②
Pulse and direction outputs
③
Power section for stepper motor
④
Power section for servo motor
The DC/DC/DC variants of the CPU S7
-1200 have onboard
outputs for direct control of drives. The relay variants of the
CPU require the signal
board with DC outputs for drive
control.
A signal board (SB) expands the onboard I/O to include a few additional I/O points. An SB
with two digital outputs can be used as pulse and direction outputs to control one motor. An
SB with four digital outputs can be used as pulse and direction outputs to control two motors.
Built-in relay outputs cannot be used as pulse outputs to control motors. Whether you use
onboard I/O or SB I/O or a combination of both, you can have a maximum number of four
pulse generators.