Programming Example - Siemens SIMATIC S7-1500 System Manual

Configuring
9.9 Configuration of digital inputs/outputs (X142)
Digital outputs
With digital outputs (DQ, Timer DQ, oversampling DQ, pulse width modulation PWM), the
value corresponds to the actual terminal state of the digital output. If the terminal state
deviates from the controlled state, there may be an output driver short-circuit or defect.
Note
STS_DI
Signals are only reliably acquired over STS_DI if the level is significantly longer than the input
delay + acquisition cycle of the digital inputs/outputs (X142).
Example: If you operate the digital inputs/outputs (X142) as isochronous to the MC Servo in a
cycle of 2 ms and a set input delay of 125 µs, the level duration must be > 2.125 ms.
9.9.11

Programming example

You can find a programming example for the use of the integrated digital inputs/outputs in
the following FAQ on the Internet
(https://support.industry.siemens.com/cs/ww/en/view/109782269).
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SIMATIC Drive Controller
System Manual, 11/2023, A5E46600094-AD