SS1-r – Safe Stop 1 with monitoring of the deceleration ramp

When the SS1-r function is active, the drive inverter brings the motor to a standstill electrically. The deceleration is monitored. The safety sub-function STO is triggered when the monitored deceleration is exceeded or when standstill is reached.

This safety sub-function corresponds to a controlled stop of the drive according to EN 60204‑1, stop category 1.

 

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Safety sub-function monitored

 

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Safety sub-function STO active

v

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Speed

t

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Time

t1

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Point in time when SS1-r is activated and motor deceleration is triggered.

t2

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Point in time when STO is triggered.