Function description
Operating Manual PSSu K F EI
1003303-EN-03
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4.5.3
Safe operating stop monitoring SOS-M
The "Safe Operating Stop Monitoring" function (SOS-M) monitors whether the standstill po-
sition remains within a configured tolerance window. The monitoring function SOS-M is not
available on sensors on which a position cannot be determined (Ini pnp-pnp, pnp-npn, npn-
pnp,npn-npn). The signals SOSM_Enable and SOSM_Enable_SS1M are constantly "0".
Activate the monitoring function by:
}
0/1 pulse edge at SetSOSM. The signal determines the current position to be monitored.
Reaction:
}
0/1 pulse edge at SOS-M_Enable_SS1-M
}
SOS delay time (t1) is running
}
A 0/1 pulse edge at SetSOSM before the delay time has elapsed is ignored.
}
Once the SOS delay time has elapsed, the current position is adopted and safe standstill
is monitored → 0/1 pulse edge at SOSM_Enable.
}
Another 0/1 pulse edge at SetSOSM during active monitoring (SOSM_Enable = 'TRUE')
means that the current position is immediately adopted as the new reference position,
without delay.
}
When the configured tolerance window is violated:
– a 1/0 pulse edge at SOSM_Enable
– the local outputs switch off, depending on the configuration. Further information is
available in PAS4000's online help
