Yaskawa G5HHP Drive - Manual (Page 280)

User Constants
8.2.2 Autotuning Constants: C
8 - 14
J
Carrier Frequency: C6
Consta
Name
S tti F t
Change
Control Methods
Consta
nt
Num-
ber
Display
Description
Setting
Range
Factory
Setting
Change
during
Opera-
tion
V/f
V/f
with
PG
Open
Loop
Vector
Flux
Vector
Page
C6-01
Carrier Frequen-
cy Upper Limit
Set the carrier frequency upper limit and
lower limit in kHz units. (See note 2)
The carrier frequency gain is set as fol-
lows: 2.0 2.0 x B B B B 7 - 53 C6 01
Carrier Freq Max
lows:
;
In vector control mode, the upper
limit of the carrier frequency is fixed
at C6-01
2.0 2.0 x B B B B 7 - 53
C6-02
Carrier Frequen-
cy Lower Limit
at C6-01
Carrier frequency
S C6-01 ≧ 10.0 : K=3
S 10.0>C6-01 ≧ 5.0 : K=2
0.4 to
2 0
2.0 x A A x x 7 - 53 C6 02
Carrier Freq Min
Carrier frequency
C6-01
10.0>C6 01 ≧ 5.0 : K=2
S 5.0>C6-01 : K=1
2.0
2.0 x A A x x 7 - 53
C6-03
Carrier Frequen-
cy Gain C6-02
Output frequency ×
(C6-03) × K
Output
frequency 00 to 99 0 x A A x x 7 - 53 C6 03
Carrier Gain
(C6-03) × K
frequency
E1-04
(Max. output frequency)
0
00 to 99 0 x A A x x 7 - 53
J
Hunting Prevention: C7
C t t
Name
S tti F t
Change
Control Methods
Constant
Number Display
Description
Setting
Range
Factory
Setting
Change
during
Opera-
tion
V/f
V/f
with
PG
Open
Loop
Vector
Flux
Vector
Page
C7-01
Hunting prevention
selection
0: Disabled
1: Enabled
;
The hunting prevention function
is used to stop a motor under a
light load from hunting.
This function is exclusively for
0, 1 1 x A A x x 7 - 12 C7 01
Hunt Prev Select
This function is exclusively for
the V/f control mode.
When greater responsiveness
than oscillation control is re-
quired, set hunting prevention to
“disabled.”
0, 1 1 x A A x x 7 - 12
C7-02
Hunting prevention
gain
Sets the ratio for hunting prevention
gain.
;
Usually setting is not necessary.
Adjust in the following circum-
stances:
S When oscillation occurs due to a
light load increase the set values
0.00 to
2 50
1.00 x A A x x 7 - 13 C7 02
Hunt Prev Gain
light load, increase the set values.
S When the motor is stalled, de-
crease the set values.
If the set values become too large,
the motor may stall as a result of
non-controlled current.
2.50
1.00 x A A x x 7 - 13
8