Operation
Operating Manual PNOZ ml1p
21575-EN-06
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7
Operation
When the supply voltage is switched on, the PNOZmulti safety system copies the configur-
ation from the chip card.
The LEDs “POWER”, “DIAG”, “FAULT”, “IFAULT” and “OFAULT” will light up on the base
unit.
The PNOZmulti safety system is ready for operation when the "POWER" and "RUN" LEDs
on the base unit and the "READY" LED on the PNOZ ml1p are lit continuously.
7.1
LED indicators
Legend
LED on
LED flashes
LED off
LED
LED status
Meaning
READY
Gree
n
The unit is ready for operation
The unit is not ready for operation
FAULT
Red External error
Red Internal error
No fault
TR
Yel-
low
Connection to another PNOZ ml1p available
No connection to another PNOZ ml1p
7.2
Fault detection
Each base unit contains information about
}
its own link module (in order, defective, no supply voltage)
}
the status of the connection (yes, no)
}
the operating status of the connected base unit (RUN, STOP)
When the connection is interrupted, the base units switch the virtual inputs to zero. The
base units remains in a RUN condition.
Defective link module:
}
The corresponding base unit switches to a STOP condition. The virtual outputs on the
link module are set to zero.
}
The connected base unit remains in a RUN condition.
