960 HEIDENHAIN Technical Manual MANUALplus 620
Since the AC-fail signal is reported to the control before the powerfail, the
MANUALplus 620 has more time to react to the subsequent DC-link voltage
failure.
If a power fail is triggered on the control, all drives are brought to a controlled
stop. The PLC outputs are switched off and the control freezes to ensure that
the hard disk can no longer be accessed.
The MANUALplus 620 must be turned off and on again.
Define in MP_ampAcFailSelection whether the powerfail in the control is
generated via the AC-fail and/or the powerfail signal of the power module.
MP_ampAcFailSelection
Signal for powerfail
Available from NCK software version: 597 110-01.
Format: Selection menu
Selection: AC fail only generated
Only AC-fail signal
power fail and AC fail generated
Powerfail and AC-fail signals
AC fail / power fail inactive
AC fail and powerfail deactivated
power fail only generated
Only powerfail signal
Default: AC fail only generated
Access: LEVEL3
Reaction: RESET
Only certain HEIDENHAIN power supply units provide the AC-fail signal
(see the Technical Manual for "Inverter Systems and Motors"). If you are
using power supply units that do not provide this signal, you must not
select the AC-fail signal in MP_ampAcFailSelection.
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