Use Of The Safety Function; Activating; Resetting; Pous Indications - ABB ACS880 User Manual

18 Option description and instructions

Use of the safety function

Activating


1. Switch off the POUS switch.

Resetting


You do not need to press any reset button to restore to normal operation after inactivating
the POUS function. The reset input of the POUS safety relay [A65] is set to autoreset
mode at the factory. However, you must reset the inverter units if they have tripped on fault
at the activation of the POUS function. The reaction of the inverter units depends on the
parameter settings. See section

POUS indications

When the POUS is activated:
•
the inverter unit control program has the warning Safe torque off active,
•
the POUS indication lamp [Pxx] is on.
Note: The POUS indication is not SIL/PL rated.

Fault tracing

This table describes the status LEDs of the POUS safety relay [A65].
LED LED is lit and steady
Netz Power supply is connected.
K1 Relay K1 is energized.
K2 Relay K2 is energized.
For more fault tracing possibilities, see the hardware and firmware manuals of the drive.

Maintenance

After the operation of the circuit is tested at start-up, it does not need any scheduled
maintenance during its specified lifetime.
In addition to proof testing, it is a good practice to check the operation of the function when
other maintenance routines of the machinery are carried out.
If you change any wiring or component after the start up, or restore parameters to their
default values:
•
Use only ABB approved spare parts
•
Register the change to the change log for the safety circuit
•
Test the safety function again after the change. Obey the rules given in section
up and acceptance test
•
Document the tests and store the report into the logbook of the machine.
Parameter settings
on page 16.
on page 14.
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