Hitachi WJ C1 Series

Chapter 8 Mandatory Setting for Motor Drive and Test Run
8-1-3
■ List of parameters changed when switching to low duty rating
Code
Item
Data
Default value after
initialization
Setting at
switching to LD
[A044]
*1
Control mode selection
00(V/f constant torque)/
01(V/f reduction torque)/
02(Free-V/f)/
03(sensorless vector)
00
00
[A054]
DC braking force
0 to 70 (%)
50 (%)
50 (%)
[A057]
DC braking force at start
0 (%)
0 (%)
[b012]
*1
Electronic thermal level
(0.20 to 1.00) × LD
rated current (A)
LD rated current (A)
Converted
value
[b016]/
[b018]/
[b020]
Free electronic thermal
current-1 to 3
(0.00 to 1.00) × LD
rated current (A)
0.00A
Converted
value
[b022]
*1
Overload restriction 1
active level
(0.20 to 1.50) × LD
rated current (A)
1.2 × LD rated
current (A)
Initial value of
low duty
[b025]
Overload restriction 2
active level
[b028]
Active frequency
matching restart level
LD rated current (A)
[b083]
Carrier frequency
2.0 to 10.0 (kHz)
2.0 (kHz) [Pattern 0]
10.0 (kHz) [Pattern 1]
2.0 (kHz) [Pattern 3]
2.0 (kHz)
[C030]
[Ao2] Output reference
value (at digital output
current monitor)
(0.20 to 2.00) × LD
rated current (A)
LD rated current (A)
Converted
value
[C039]
Low current detection level
[C041]
*1
Overload warning level
0.00: Function disabled
(0.01 to 2.00) × LD
rated current (A)
1.15 × LD rated
current (A)
[C111]
Overload warning level 2
[H003]
*1
Async. Motor capacity
0.1 to 18.5 (kW)
One size bigger than
the model capacity
No change
*1. 2nd-motor control [SET] target parameter.
 The "Converted value" parameter converts the current setting value at the rated current ratio of
ND and LD.
(e.g.) When ND rated current = 8.0 A/LD rated current = 10.0 A, if the setting 4.0 A at ND mode
is changed to LD mode, it will be converted as follows.
(10/8) × 4.0 A = 5.0 A
(In the case of conversion from LD to ND, it is converted by the inverse ratio shown above.)
 When the load rating mode is changed, it may be necessary to set the parameters again. Refer to
the above table and recheck each parameter. Also recheck the parameters related to heat
generation and cooling of the inverter, such as parameters related to torque and current setting,
automatic carrier reduction function, and cooling fan control method selection.
 The inverter mode monitor [d060] can be used to check which operation mode is currently
selected.
!