Function description
Operating Manual PNOZ m EF 2MM
1003107-EN-10
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t
STO
:
Actual time from activation of monitoring function until STO is activated
Sequence when stop position is violated:
Tol
t
v, s
STO
t
Delay
t
1
t
2
v(t)
s(t)
SOS
t
3
Legend
t
1
:
Activation of the monitoring function SS2-M
t
2
:
Standstill limit value for automatic SOS reached, monitoring of stop posi-
tion (SOS) is activated
t
3
:
Stop position outside of tolerance window, safety function "Safe torque
off" (STO) is activated
t
Delay
:
Set delay time for controlled braking of motor
4.3.7
Safely limited acceleration monitoring (SLA-M)
The monitoring function
Safely limited acceleration monitoring
monitors the speed
change per time unit.
Both the acceleration and the deceleration can be monitored.
Monitoring checks whether the acceleration or deceleration exceeds or falls below a certain
limit value.
4 SLA-M elements can be configured per axis in the PNOZmulti Configurator.
The monitoring function
Safely limited acceleration monitoring
is activated with a rising
edge at the start input. The trigger detection phase starts with a falling edge at the start in-
put. In this process the current speed is taken as the start speed.
Monitoring of safely limited acceleration starts,
}
when the trigger threshold is passed, that is, when the start speed changes by the con-
figured percentage (V1).
}
When monitoring starts within the maximum trigger time (t1).
