Safety Functions; Safe Stop 1 - Ss1 - Pilz PMCprotego S1 Operating Manual

4 Function Description
4.3

Safety functions

Sicherheitsfunktion_haengende_Lasten
Sicherheitsfunktion_STO_Diagramm_S1
Sicherheitsfunktion_STO_Diagramm_S1_S1-2_Legende
4.3.2

Safe stop 1 - SS1

4- Sicherheitsfunktion_SS1_Ueber Safe stop 1 - SS1
4-10
Reaction:
The drive is switched to torque-free

"STO Acknowledge" output: "1" Signal

If any external forces influence the motor axis (e.g. suspended loads),
additional measures (e.g. a safety holding brake) are required in order to
eliminate hazards.
Timing diagram:
v
1
SS1 Activate
0
1
SS1 SIL3/Reset
0
1
Ready
0
1
STO Acknowledge
0
Fig. 4-2: Safety function STO
t : Safety function STO switched directly due to a "0" signal from

1
– 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

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 de-
fined period (STO delay time) or once the motor is at standstill, the safety
function "safe torque off" (STO) removes the power to the motor.
STO
t 1 t