inverter,s speed protection

forward torque limit

set the torque limit values as a percentage of the motor rated torque.four indevidual
regions can be set.

reverse torque limit

note: torque limits can be set seperately for the 4 ways that torque can be applied: forward
torque,reverse torque,forwards generative torque,and reverse generative torque.

forward regenerative torque limit

show the relationship between each constant and output torque to set the torque limit.

reverse generative torque limit

when the torque limit function is used, the torque limit have priority and motor speed
control and compasation will be disregarded, so the accelaration/deceleration might be
lengthened and motor speed might be reduced.

protect selection for internal DB resister (type ERF)

to set the pro tection function of hardware. 0: disabled. (select 0 when a breaking resistor
is n’t being used or a braking resister unit is being used.) 1:enabled. (protects the
brakins resiter from overheating.)

overheat pre-alarm level

constant l8-02 specify the detection temperature in ‘C for the inverter overheating (oh)
pre-alarm function. note: an overheat pre-alarm occurs when the temperature of the
cooling fins reaches this level.

operation selection after overheat prealarm

constant l8-03 specifies the processing that will be performed when and over head prealarm
occurs. 0:decelerate to a stop in the deceleration time set in c1-02.(protection operation:
faults contact operate).1: coast to stop.(protectio operation: faults contact operate)
2:emergency stop in the emergency stop time set in the c1-09.(protection operation: fault
contacts operate)3:continues operation.(alarm:moniter display only.) note:constant l8-02
specifies the detection temperature in ‘C for the overheat(oh) prealarm function. an
overheat prealarm occurs when the temperature of the cooling fins reaches this level.
constant l8-03 specifie the processing that will be performed when an over-heat (0h1)
is detected as a protection function at 105_c.

input open phase protection selection

input open-phase protection selection 0:disabled 1:enabled.(detects input power
supply open-phase, 3-phase imbalance, or deterioration of the main cicuit capacitor.)
note: this function detects changes in the main circuit dc voltage which indicate a power
supple open phase,large imbalance in the power supply voltage, or deterioration of the main
circuit capacitor.

output open phase protection selection
output open-phase protection selection 0: disabled. 1: effection enabled.(detects an
output open-phase at fever than 10% of the inverters rated output currents.)note:
when inverter’s capacity is smaller than the motor’s power,and fault detection will occur.
lease set it as “0” (disabled)
ground protection selection
0:disabled 1:enabled
carrier frequency reduction selection
carrier frequency reduction selection 0: fix the carrier frequency 1:reduce the carrier
2:ol2( for factory setting) 3:current limit (for factory setting) note:when low frequency
(under 6xz) motor give metal sound( carrier sound),pleaseset l8-17=0(no carrier frequency
reduction),l8-19 (ol2characteristics al low speed selection)=1 (effective)V/F control
without PG, please do not set both l8-17 and l8-19to be 0.
0l2 cheracteristics selection at low speeds
cheracteristics at low speed. 0: disabled 1: enabled note: at low frequency (6hz), ol2
jumps even load is low. in this case please set the l8-17=1 with carrier frequency
reduction) l8-19 (low speed o12 cheracteristics selection) to be disabled).but for
 the inverter with 400V,185-300kw, please do not set l8-09 to be 0. V/V control
vector control without pg, please do not set both l8-17,l8-19 to be 0. in the occation of
vector control with pg and low-speed high-load continuos operation. please reduce the
carrier frequency (c6-01)to be 2khz.
monitor selection.
in operation mode, to set the code no . of the monitored iteme by filling oo in “u1-00”).
in operation mode , the frequency reference output frequency ,output current and output
voltage can be monitored immediately if the factory setting are bieng used. one of these
four values, the output voltage, can be changed to a different value. when you want to
monitor a value other than the output voltage, set that number in constant o1-01.
use the last two digits from the “u1 monitor” list (u1-jj) to select a value.



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