78
(2) This function is disabled with the fault protection caused
by
overload and overheat.
4-2-7
4-2-7
4-2-7
4-2-7
.
.
.
.
Fault
Fault
Fault
Fault recording
recording
recording
recording parameters
parameters
parameters
parameters （ Group
Group
Group
Group P6
P6
P6
P6 ）
0
0
0
0 ：
no
no
no
no
fault
fault
fault
fault
1
1
1
1 ～ 17
17
17
17 ： E-01
E-01
E-01
E-01 ～ E-17
E-17
E-17
E-17 fault
fault
fault
fault ， refer
refer
refer
refer
to
to
to
to
chapter
chapter
chapter
chapter 5
5
5
5 for
for
for
for fault
fault
fault
fault types.
types.
types.
types.
4-2-8
4-2-8
4-2-8
4-2-8 .Close-loop
.Close-loop
.Close-loop
.Close-loop control
control
control
control parameters
parameters
parameters
parameters (Group
(Group
(Group
(Group P7)
P7)
P7)
P7)
Analog feedback control system
Reference pressure is input via VI, and feedback value ( 4 ～ 20mA ) of pressure sensor is input to inverter via CI
.
Also, there
is an internal PI adjust or to form analog close-loop control system
,
as shown in Fig4-32.
Fig.
Fig.
Fig.
Fig. 4-32
4-32
4-32
4-32 Analog
Analog
Analog
Analog feedback
feedback
feedback
feedback control
control
control
control system
system
system
system with
with
with
with internal
internal
internal
internal PI
PI
PI
PI
Principle diagram of inverter
’
s internal PI is shown below:
Fig.
Fig.
Fig.
Fig. 4-33
4-33
4-33
4-33 PI
PI
PI
PI block
block
block
block diagram
diagram
diagram
diagram
Close-loop reference, feedback, limits of deviation, proportional and integral parameters which are as same as common PI
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