Pilz PMCprotego S1 Operating Manual page 43

4 Function Description
4.3 Safety functions
Sicherheitsfunktion_SSR_S1_mT_Diagramm
Sicherheitsfunktion_Legende_SSR_TolBerecih
Sicherheitsfunktion_Legende_SSR
Sicherheitsfunktion_Legende_ts_t1_t2
SSR Activate: Input for safety function SLS

Ready: Output for operating status of the safety card

STO Acknowledge: Output for feedback from safety function STO

SRA Acknowledge: Output for monitoring the limit value on the motor

Timing diagram with tolerance range activated
v
Tolerance amount
Limit value
for maximum speed
Limit value
for minimum speed
Tolerance amount
1
SS1 Activate
0
1
SS1 SIL3/Reset
0
1
SSR Activate
0
1
Ready
0
1
STO Acknowledge
0
1
SRA Acknowledge
0
Fig. 4-9: Safety function SSR with tolerance range activated
Tolerance amount as % of the two limit values, maximum and mini-

mum speed
t : Activation of safety function SSR

a
t : Once the SSR delay time has elapsed, the speed is monitored

e
t : Speed v exceeds the limit value and activates the tolerance range

s
(tolerance amount, tolerance time, tolerance period)
t : Tolerance time

1
SSR
t a t e t s
SSR
SSR delay time
t 1
t 2
t
t 1
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