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Function description
Timing diagram:
Fig.: Safety function STO
}
t
: Safety function STO switched directly due to a "0" signal from
1
–
–
}
Ready: Output for operating status of safety card and second output for feedback from
safety function STO
}
STO Acknowledge: Output for feedback from safety function STO
4.3.2
Safe stop 1 - SS1
The safety function "safe stop 1" (SS1) brakes the motor to standstill in a controlled manner
and removes the power to the motor. After a defined period (STO delay time) or once the
motor is at standstill, the safety function "safe torque off" (STO) removes the power to the
motor.
Features of the safety function:
}
The motor becomes torque-free and no longer generates any hazardous movements.
}
The safety function "safe stop 1" corresponds to a category 1 stop (controlled braking)
in accordance with EN 60204-1.
The safety card monitors the following functions:
}
Braking ramp
In the Configurator, the braking ramp is specified and monitoring is activated. The brak-
ing period depends on the speed of the motor when braking is started.
The braking ramp can be monitored via a maximum position error specified in the Con-
figurator.
Operating Manual PMCprotego S2-2(-C)
1002529-EN-04
SS1 Activate
Reset
Ready
STO Acknowledge
SS1 Activate: Input for safety function SS1
Reset: Input for reset
v
t 1
1
0
1
0
1
0
1
0
STO
t
21
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