Pwm With Dc Motor Motor; Function; Introduction - Siemens ET 200SP Manual

Configuring/address space

4.6 PWM with DC motor motor

4.6 PWM with DC motor motor
4.6.1

Function

4.6.1.1

Introduction

In this operating mode, the respective channel of the technology module at the bipolar digital
output sends a pulse width modulated signal to control a brushed DC motor in both
directions of rotation. You specify the duty cycle via the control interface.
Each channel has a bipolar digital output DQn.A/DQn.B for the connection of a DC motor.
The module works as four-quadrant actuator. DQn.A and DQn.B are connected inside the
module as an H-bridge. For information on connecting the motor, refer to the section
Connecting (Page 15).
The duty cycle acts like a voltage and thus determines the speed of the motor. The sign of
the duty cycle specifies the direction of rotation. When you drive the motor in forward
direction, DQn.A is set and DQn.B is reset. When you drive the motor in the reverse
direction, DQn.A is reset and DQn.B is set.
You can stop the motor using one of the following signals:
● Reset the control bit SW_ENABLE in the control interface
● Falling edge of the HW enable (DIn.0)
● Rising edge of the limit switch (DIn.0)
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Technology Module TM Pulse 2x24V (6ES7138‑6DB00‑0BB1)
Manual, 05/2019, A5E35061186-AB