Operation; Led Indicators; Fault Detection - Pilz PNOZ mml2p Operating Manual

Operation

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 mml2p are lit continuously.
7.1

LED indicators

Legend
LED
Power
Ready
Fault
Traffic
7.2

Fault detection

The base unit contains information about the
Link module (in order, defective, no supply voltage)
}
Status of communication with the decentralised modules (data valid, data invalid)
}
If the connection to a decentralised module is interrupted or there is a major error on the
decentralised module, the inputs on the devices connected to the link module are set to
zero. The base unit remains in a RUN condition.
Operating Manual PNOZ mml2p
1002234-EN-04
LED on
LED flashes
LED off
LED status Meaning
No supply voltage
Gree Supply voltage is present
n
Gree The unit is ready for operation
n
The unit is not ready for operation
Red External error
Red Internal error
No fault
Yel- Connection to a decentralised module avail-
low able
Yel- Connection is not available to all decentralised
low modules.
No connection to a decentralised module
19