Pilz PMCprimo DriveP.01/AA0/4/0/0/208-480VAC - Manual (Page 22)

Function description
Operating Manual PMCprotego S1­2(­C)
1002528­EN­02 22
Timing diagram:
v
t t1
1
0
STO Acknowledge
STO
SS1 Activate
1
0
SS1 SIL3/Reset
1
0
Ready
1
0
Fig.: Safety function STO
} t
1
: Safety function STO switched directly due to a "0" signal from
– SS1 Activate: Input for safety function SS1
– SS1 SIL3/Reset: Input for SIL 3 and reset
} Ready: Output for operating status of the safety card
} 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 torque­free 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 60204­1.
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.