Operation
Operating Manual PNOZ mo4p
20942-EN-08
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7 Operation
When the supply voltage is switched on, the PNOZmulti copies the configuration from the
chip card.
The PNOZmulti system is ready for operation when the "POWER" and "RUN" LEDs on the
base unit are lit continuously.
7.1 LED indicators
Legend
LED on
LED flashes
LED off
Basis PNOZ mo4p Error
External error on the output, e.g. defective feed-
back loop
Internal error on the expansion module
7.2 Function test of the relay outputs
When the relay outputs are switched on, the mechanical contact on the relay cannot be
tested automatically. Depending on the operational environment, measures to detect the
non-opening of switching elements may be required under some circumstances.
When the product is used in accordance with the European Machinery Directive, a check
must be carried out to ensure that the safety contacts on the relay outputs open correctly.
Start the device again or open the safety contacts (switch off output), so that the internal
diagnostics can check the correct opening of the safety contacts
} for SIL CL 3/PL e at least 1x per month
} for SIL CL 2/PL d at least 1x per year
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