Safe Stop 2 - Ss2 - Pilz PMCprotego S2-2 Operating Manual

Function description
}
Reset: Input for reset
}
Ready: Output for operating status of the safety card
}
STO Acknowledge: Output for feedback from safety function STO
4.3.3

Safe stop 2 - SS2

The safety function "Safe Stop 2" (SS2) brakes the drive in a controlled manner and monit-
ors it for standstill.
Features of the safety function:
} The drive's control functions are maintained. Power is applied to the motor.
}
Power to the motor is not shut down.
} The safety function "Safe Stop 2" corresponds to controlled braking in accordance with
IEC 60204-1, stop category 2.
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.
}
Braking ramp in normal operation
The drive starts with the configured braking ramp when safety function SS2 has been
activated. Once the time has elapsed, SOS is activated.
}
Standstill position
–
–
}
Automatic SOS at standstill
A standstill threshold for activating the safety function SOS can be specified in the Con-
figurator.
Safety function SOS is activated when
–
–
Input and output assignment in the Configurator:
}
Inputs I0 ... I6
–
}
Outputs O0 ... O3
–
Prerequisites for normal operation:
} Input "SS1 Activate" and "Reset": "1" Signal (+24 VDC)
}
"Ready" output: "1" Signal (+24 VDC). The safety card is ready for operation.
}
"STO Acknowledge" output: "0" Signal
Operating Manual PMCprotego S2-2(-C)
1002529-EN-04
The safety function monitors whether the standstill position remains within a con-
figured tolerance window.
Safety function SS1 (E-STOP braking ramp) is activated if the standstill position
leaves the tolerance window.
standstill is achieved while the SOS delay time is running.
the SOS delay time has elapsed.
SS2 Activate
SSA Safe Standstill Acknowledge
25