Safety Integrated
9.4 Commissioning the basic functions
Getting Started - SINAMICS Startdrive
72 Getting Started, 01/2015
Configuring the discrepancy time and the filter time
Discrepancy/filter time
If Safety Integrated is active, the inverter checks whether the signals at both inputs always
have the same signal state. Because of the technical characteristics of the sensors, brief
discrepancies or signal changes between the two input signals that are not safety relevant
can occur. A fail-safe logic with safe outputs connected with the SINAMICS G120 can also
be used for the activation. Some such fail-safe outputs provide test pulses that can be
suppressed by the filter. The discrepancy or filter time can be used to prevent a faulty
initiation or discrepancy error because of transient different signal levels of the safety
function.
1. Click "F-DI/F-DO/PROFIsafe" in the secondary navigation.
2. You can set the discrepancy time and the input filter time in the displayed screen. Adapt
these values to the connected sensors and to the duration of the test pulses for the
deployed fail-safe outputs.
Figure 9-7 Configuring the discrepancy time and filter time basic functions
The safety commissioning is completed in the next step.
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