YASKAWA VARISPEED-616G5, Instruction Manual

Page: 144 / 355

Basic Operation
6.4.4 Speed Control (ASR) Structure
6 - 36
Fault Display Remedy Probable Cause
PG Circuit Fault
PGO: PG break detected)
Pulses aren’t being input
from the PG even though a
rotation output is being sent
to the motor.
S
The cable to the PG is bro-
ken/disconnected.
S
The PG’s power supply is
broken/disconnected.
Check the wiring and correct any problems.
Tune Aborted
Minor Fault:
VVV
---
A minor Inverter fault oc-
curred.
Check the minor fault indicated in the boxes
in the display shown at the left.
V/f Over Setting
The torque command ex-
ceeded 100%, and the non-
load current exceeded 70%
The rated voltage and the
frequency settings are incor-
rect.
Check and adjust the settings.
V/f Over Setting
load current exceeded 70%
of the rated motor current.
The load is connected to the
motor.
Disconnect the load from the motor.
6.4.4 Speed Control (ASR) Structure
D
The following block diagram shows the structure of the speed control.
Frequency
reference
−
C5-01, C5-03
P
I
+
+
Torque limits
Secondary cur-
rent reference
C5-02, C5-04
C5-06
L7-01 to L7-04
Detected
speed
+
In vector flux control, the ASR’s P gain is the maximum frequency standard.
Primary
delay filter
Fig 6.14 Speed Control Structure
J
Gain Settings: C5-01, C5-02
D
Set the proportional gain and the integral time of the speed control (ASR).
User
Change
during Setting Factory
Valid Access Levels
User
Constant
Number
Name
g
during
Opera-
tion
Setting
Range
Unit
Factory
Setting
V/f
Control
V/f with
PG
Open
Loop
Vector
Flux
Vector
C5-01
ASR proportional
(P) gain 1
f
0.00 to
300.00
Multi-
ple
20.00
×
B
×
B
C5-02
ASR integral (I)
time 1
f
0.000 to
10.000
s 0.500
×
B
×
B
J
Low-speed Gain Settings: C5-03, C5-04, C5-07
D
Use these constants to set different proportional gain and integral time settings for low-speed opera-
tion. Constant C5-03 sets the low-speed proportional gain of the speed loop (ASR), and C5-04 sets the
low-speed integral time.
D
Set constant C5-07 to the frequency at which to switch to the low-speed ASR proportional gain and
integral time.
User
Change
during Setting Factory
Valid Access Levels
User
Constant
Number
Name
g
during
Opera-
tion
Setting
Range
Unit
Factory
Setting
V/f
Control
V/f with
PG
Open
Loop
Vector
Flux
Vector
C5-03
ASR proportional
(P) gain 2
f
0.00 to
300.00
Multi-
ple
20.00
×
B
×
B
C5-04
ASR integral (I)
time 2
f
0.000 to
10.000
s 0.500
×
B
×
B
C5-07
ASR switching fre-
quency
×
0.0 to 400.0 Hz 0.0
× × ×
A
6