FE FRENIC-Multi series, Instruction Manual

Page: 138 / 196

5-63
H70
Overload Prevention Control
H70 spe ut frequency ue
to an o load. T e output freque efore the inverter
trips du a hea ad (wit n of
0h1
or
0lu
,
respec ely). It i r equipment such as pump ase in the output
freque leads t and it is nece en
when the output fre
Dat r H70 Func
c
ver
ifies the decelerating rate of the outp
his control decreases th
to prevent a trip fro
ncy of the inverter b
m occurring d
e to
tiv
t sink overheat or inverter overlo
s useful fo
h an alarm indicatio
s where a decre
ncy o a decrease in the load
quency drops.
ssary to keep the motor running ev
a fo tion
0.00 ration t ) Decelerate the motor by decele ime 1 (F08) or 2 (E11
0.01 to 100.0 n rate Decelerate the motor by deceleratio from 0.01 to 100.0 (Hz/s)
999 trol Disable overload prevention con
In equi in the output f ease
in the load, the overload prevention control is should not be enabled.
H71
Decele
pment where a decrease requency does not lead to a decr
of no use and
ration Characteristics
Setting H71 (ON) enables forced br erative energy
produced during the deceleration of the motor and returned to the inverter exceeds the
ltage trip will occur. The forced brake control increases
th gy loss du easing the decelera
the data to "1" ake control. If regen
inverter’s braking capability, an overvo
e motor ener ring deceleration, incr tion torque.
This fun controlling the torque n; it has no effect i ction is aimed at during deceleratio f
there is
deceleration (anti-re 69 = 2 or 4)
s racteristics specif
H9
braking load.
Enabling the automatic generative control, H
disable the deceleration cha ied by H71.
4
Cumulative Motor Run Time 1
Operating the keypad can display the cumulative his feature is useful for
management and maintenance of the me tem s you to e
cumulative run time of the e ng e
cumulative run time of the motor.
run time of motor 1. T
chanical sys
sired value. For e
. H94 allow
xample, specifyi
set th
"0" clears th motor to the d
The H94 dat
keypad. a is in imal no appears mal
H98
ten ction (M ction)
hexadec tation. It in deci notation on the
Protection/Main ance Fun ode sele
H98
inpu
the
link spe r to enable or disable (a) automatic lowering of carrier frequency, (b)
t n, ( phase l ction, an gme
D r, as cifyin gment th on th the DC
bus capacitor, in a style of (Bi
Automatic of carr ncy (Bi
cifies whethe
phase loss protectio
C link bus capacito
c) output
well as spe
oss prote
g the jud
d (d) jud
reshold
nt on the life of
e life of
combination
ier freque
t 0 to Bit 4).
t 0) lowering
This unction should be used for important machinery that requires keeping the inverter
running.
f a heat sink overheat or overload occurs due to excessive load, abnormal ambient
ture, or cooling system failure, enabling this function
f
tempera lowers the carrier frequency to
avoid tripping (
0h1
,
or
0luv
). Note that enabling this function results in increased motor
noise.
Even i