Pilz PMCprimo DriveP.06/AA0/4/0/0/208-480VAC - Manual (Page 25)

Function description
Operating Manual PMCprotego S2­2(­C)
1002529­EN­02 25
} SS1 Activate: Input for safety function SS1
} 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 60204­1, 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
– The safety function monitors whether the standstill position remains within a con­
figured tolerance window.
– Safety function SS1 (E­STOP braking ramp) is activated if the standstill position
leaves the tolerance window.
} 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
– standstill is achieved while the SOS delay time is running.
– the SOS delay time has elapsed.
Input and output assignment in the Configurator:
} Inputs I0 ... I6
– SS2 Activate
} Outputs O0 … O3
– SSA Safe Standstill Acknowledge
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.