Functions; Pulse-Width Modulation (Pwm) - Siemens SIMATIC S7-1500 Manual

2.2

Functions

2.2.1

Pulse-width modulation (PWM)

Channels 0 and 4 of the module support the pulse width modulation (PWM) function. The
pulse width modulation function can be used to easily generate periodic pulses with a
constant rated voltage and a variable pulse duration for the above-mentioned channels.
Advantages
● Automatic generation of periodic signals (without user program).
● Possibility of power reduction, e.g. in solenoid valves.
Typical areas of application:
● Control of proportional valves and way values (e.g. energy saving by reducing the holding
current).
● Heating control e.g. via an external additional power unit.
Requirement
Firmware version as of V2.1.0 of the module.
Rules
Channels 0 and 4 can be used together and individually in pulse width modulation mode.
The remaining channels can continue to be used as digital outputs.
Configuration
You configure the pulse width modulation with the following parameters:
● Pulse width modulation mode for activating the function
● Pulse width modulation (time period)
DQ 8x24VDC/2A HF Digital Output Module (6ES7522-1BF00-0AB0)
Manual, 06/2018, A5E03485650-AF
Product overview
2.2 Functions
13