Hitachi SH1 Series Basic Manual page 70

Chapter 4
[bb101]～[bb-23]
Reduction of electromagnetic sound
Code/Name
bb101
Carrier
frequency, 1st-motor
bb102
Sprinkle carrier
pattern selection,
1st-motor
bb103
Automatic carrier
frequency reduction
selection, 1st-motor
・To decrease noise, [bb101] should be set small. To lower
electromagnetic sound, [bb101] has to be set bigger.
・By setting the duty specification selection [Ub-03], the
carrier frequency is internally limited.
*1)The carrier frequency ofSH1-01760-H(SH1-750H)～
SH1-03160-H(SH1-1320H)is as below。
[Ub-03]=02: 0.5～10.0(kHz)
[Ub-03]=00 or 01: 0.5～8.0(kHz)
・For the sake of the inverter protection, the Automatic
carrier reduction [bb103] decreases the carrier in
certain cases.
Reset operation after error event
Code/Name
00(Disable)/
bb-10
01(If RUN command is OFF)
Automatic
02(After set time)/
error reset selection
04(Emergency force drive)
bb-11
00(Enable)/
Automatic
01(Disable)
error reset wait time
bb-12
Automatic
0.0～600.0(s)
reset waiting time
bb-13
Automatic
0～10(count)
error reset number
・Adjustment of the automatic reset that follows an error
event. In the case that RUN command was on
execution, after the reset, is followed by the setting of
[bb-41].
Retry/trip setting in error event
Code/Name
bb-20
Retry count after power loss
event
bb-21
Retry count after
undervoltage event
bb-22
Retry count after
overcurrent event
bb-23
Retry count after
overvoltage event
・Sets number of retries before tripping.
・If 0 is set, as soon as an error occurs, it will trip.
・If you want to reset the retry count, assign any value
other than 0.
Initial
Range (unit)
value
[Ub-03]=02:ND
0.5～16.0(kHz)
[Ub-03]=01:LD
2.0
0.5～12.0(kHz)
[Ub-03]=00:VLD
0.5～10.0(kHz)
*1)
00(Disable)/
01(Enable: Patern-1)/
00
02(Enable: Patern-2)/
03(Enable: Patern-3)
00(Disable)/
01(Enable: Current)/ 00
02(Enable: Temperature)
Initial
Range (unit)
value
00
00
2.0
Initial
Range (unit)
value
0～16/255
0～16/255
0～5
0～5
Code/Name
bb-24
Selection of restart mode at
Instantaneous power failure/
under-voltage trip
bb-25
Allowable under-voltage
power failure time
bb-26
Retry wait time before motor
restart
bb-27
Instantaneous power
failure/under-voltage trip alarm enable
bb-28
Selection of restart mode at
over-current
bb-29
Wait time of restart at
over-current
bb-30
Selection of restart mode at
over-voltage
bb-31
Wait time of restart at
over-voltage
*2) 00(Restart motor with 0Hz)/01(Restart with a matching
frequency)/02(Restart with active frequency matching)/03(Detect
speed)/04(Decelerate and stop with a matching frequency and then
trip)
・Regarding the restart, after the waiting time is
completed the selected restart method is carried out.
Restart mode after FRS/RS
bb-40
Restart mode after FRS release
bb-41
Restart mode after RS release
*3) 00(Start with 0Hz)/01(Start with matching frequency)/02(Start with
active frequency matching)/03(Detect speed)
・When using Intelligent input terminals [FRS] and [RS],
restart mode can be selected.
・[bb-40] allows you to select the restart operation after a
free-run stop.
3
・[bb-41] allows you to select the restart operation after a
trip or reset event.
Minimum level of frequency matching
Code/Name
bb-42
Restart frequency
threshold
・The matching frequency function adopts the motor
frequency for a shockless start-up.
・If at the restart the frequency is under the [bb-42]
frequency, a 0Hz restart will be used instead.
0
Primary
0
cut off
Inverter
0
output
Motor speed
0
Lower limit
[bb-42]
4-27
For parameter configuration
[bb-24]～[bb-42]
Range (unit)
*2)
0.3～25.0(s)
0.3～100.0(s)
00(Disable)/
01(Enable)/
02(Disable at
Stop/Decel. stop)
*2)
0.3～100.0(s)
*2)
0.3～100.0(s)
Code/Name
Range (unit)
0.00～590.00(Hz)
Free-run (FRS)
Retry wait time
Restart with matching
frequency
Initial
value
01
1.0
0.3
00
01
0.3
01
0.3
Range Initial
(unit) value
00
*3)
00
Initial value
0.00