Hitachi J300 Series Instruction Manual page 126

t
Appendix 2 Instantaneous Power Failure Restart and Commercial Power Source Switching
l. lnstantaneous po\rer failure restarl
[Function Outline]
This function allows an invener operation to be selected according to the subject system as
follows when an instantaneous power failure occurs.
. Retry mode: When FTP/RST/ZST is set at IPS POWR
. Alarm mode: When ALM is set at IPS POWR
. f matching: The rotation speed and fte phase are detected while the motor is on a free
mnning to restart the operation accordingly.
WARNING
a When the invefier stops due to a trip with retry mode selected, the motor restans
suddenly. Stand clear of the machine. Otherwise, you may be injured. (Design the
machine in such a way that persons are protected against a restart of the machine.).
lsetting Methodl
.rt
Remote openror fF 221 Di8italopenior At insontaneous power tuilurc
IPS TIME 0,3 to 25.0
-
Sct a! allowable inslanlaneous
power ftilure ime.
IPS WAIT 0.1 to lff).0
Set a wait rine afieran instdtaneous power failure/power rceon
tion in fic rctry modc or alter an eror.
ALM
-n"
RST
ZST
0 Tripping wilh u instanlaneous Tripping
power iailure wilhin the IPS
TIME.If an opention command
is issued for an instanhneous
power hilu.e derecred our oflhe
IPS TIME, restan the operation
(0 Hz thn)_
Tdpping Tripping
Thc inalching stops wirh an
insbntaneous power iailure
derered wlthin $e IPS TIME.
The invenertrips *ith an
insbntaneou! power iiilure
dcrected out of the PIS TIME.
Tlte f
2
Thc inarching is renaned itrhe
The tmarching is
insbntlncous powerfajlure is reslaned ilpowcr is
q i r h , l r h c I P S l l l \ . 4 b . f t c
r c \ r o r c J $ ' r h , n . l '
inlener rips ifthe insuntmcous The invener fips
powerfailue is nor wirhin the
unless power is nor
IPS TIME. reslored eithin.los,
3
The invener is resllncd at 0 Hz
Thc invcrbr is soned
if the insranrdeous power failure al 0 Hz if power is
tr wuhin lhe PIS TlMt. The
FioFd $ithin 4Os.
invene. trips ifthe instantaneous The invertef trips
powcrkilue js nor within the
unles power h
IPS TIME,
rcstorcd within 4o".
IPS TRIP OFF
ON
No retry at an instantrneous polerfailurc and no trip
!t Io* voitageduring the invener srop.
Rery or under vohagc trip is pcrlbmed during the
'nvener srop or runnhg-
A - 1 5