SS1-t – Safe Stop 1 with time control
When the SS1-t safety sub-function is active, the motor is brought to a standstill electrically. The STO safety sub-function will be triggered after a specified, safety-related time.
The SS1-t safety sub-function corresponds to a controlled stop of the drive according to EN 60204‑1, stop category 1.
| = | SS1-t safety sub-function monitored |
| = | STO safety sub-function active |
v | = | Speed |
t | = | Time |
t1 | = | Point of time when SS1-t is activated and motor deceleration is triggered. |
t2 | = | Point in time at which STO is activated. |
Δt | = | Safety-related period of time |
INFORMATION
- The SS1-t function does not monitor the stopping of the drive.
- The safety-relevant period of time Δt allows the drive to come to a stop. In the event of a fault, the drive does not come to a stop and becomes de-energized at the time t2 (STO).
