FR-A720 Inverter, FR-ABR Brake Resistor User Manual

3. DEMONSTRATION MACHINE OPERATION
3.1 Inverter (FR-A720)
3.1.1 Representative connection wiring diagram
(1) The following shows a wiring connection example as a minimum requirement to operate
the inverter FR-A720.
Inverter
NFB
Power supply
200~230VAC
Motor
R
S
T
U
V
W
IM
External brake resistor
FR-ABR
Forward rotation
STF
Reverse rotation
STR
Reset
RES
PR
P
N
SD
Frequency setting
potentiometer
1/2 W 1k
B characteristic
A1
B1
10 (5V)
Alarm output
(operation at alarm)
C1
Scale
calibration
resistor
2
5
FM
SD
3-1
Multi-functional
indicator output
(1mA full-scale)
#
3. DEMONSTRATION MACHINE OPERATION
(2) Connection diagram of school demonstration machine
The following shows the connection diagram of the demonstration machine to be used in
this school.
Inverter
NFB
Power supply
100VAC
5060Hz
Emergency stop
TR
MC
Motor
R
S
T
U
V
W
MC
Forward rotation
Reverse rotation
High speed
Middle speed
Low speed
Output stop
Second acceleration/
deceleration
IM
5V
STF
STR
RH
RM
RL
MRS
RT
SD
Motor speed
r/mi display
PG
RUN
FU
SE
Load setting
device
10 (5V)
Frequency setting
potentiometer
2W, 1k
FM
2
5
SD
AM
5
Compensation input
2W, 1k
1
3-2
FM output
Hz display
AM output
% display
3. DEMONSTRATION MACHINE OPERATION
3.1.2 Main parameter settings and setting method
(1) Parameters
An inverter has various settings for adjusting it to the operation conditions and machine
specifications, which are called parameters.
The following shows the minimum required parameters to operate an inverter.
Factory default
Param
Name
Description
value
eter
(7.5kW or less)
No.
0
Manual torque boost Heightens the motor torque at a start.
6/4/3 %
1
Maximum frequency Sets the maximum value of the inverter output
120 Hz
frequency.
2
Minimum frequency Sets the minimum value of the inverter output frequency.
0 Hz
3
Base frequency
Sets the base frequency of the motor to be used.
60 Hz
4
3 speed setting
Sets the frequency to operate the motor at high speed.
60 Hz
(high speed)
5
3 speed setting
Sets the frequency to operate the motor at middle
30 Hz
(middle speed)
speed.
6
3 speed setting
Sets the frequency to operate the motor at low speed.
10 Hz
(low speed)
7
Acceleration time
Sets the time taken to accelerate the motor up to the
5 sec.
reference frequency.
8
Deceleration time
Sets the time taken to decelerate the motor from the
5 sec.
reference frequency to 0.
9
Electronic thermal
Sets the permissible motor current value to protect the Rated current
O/L relay
motor.
The inverter can be operated with the factory default values for the above parameters.
Set
only the necessary parameters to the optimum value in accordance with the operation
specifications of the machine.
(Note) Pr. is an abbreviation of Parameter.
1) Pr 0 Manual torque boost
This parameter makes output voltage compensation
100%
in the low speed area under the V/F control and
Output
voltage
improves the decrease of the motor torque at low
speed.
It is used with the increased setting value when the
distance to the motor is long or the motor torque in
the low speed area is insufficient. However, if the
setting value is increased too much, an overcurrent
trip occurs.
The factory default values differ depending on the
inverter capacity.
3-3
Pr.0
Setting
range
Output
frequency(Hz)
Base frequency
3. DEMONSTRATION MACHINE OPERATION
2) Pr1 Maximum frequency, Pr2 Minimum frequency
100%
These parameters determine the upper and lower
limits of the inverter output frequency.
The inverter clamps to prevent the frequency
Minimum
frequency
from exceeding the upper limit and dropping
Frequency
setting signal
below the lower limit.
Factory default value
Maximum
frequency
Output
frequency
Pr.1
Pr.2
5V(10V)(20mA)
Pr1: 120Hz
Pr2:
0Hz
Inverters are normally used with the initial values.
3) Pr3 Base frequency
Setting range of base frequency
This parameter is used to adjust the reference
frequency of the inverter to the rating of the
Output
voltage
motor.
Factory default value
100%
Pr. 19 *
Base
frequency
voltage
Pr3: 60Hz
When operating a standard three-phase motor,
Base
frequency
Pr.3
normally set this parameter to 60Hz.
400Hz
* If Pr.19 is set to 9999 (factory default), theaximum
m
output
voltage will be the same as the power supply voltage.
4) Pr4, Pr5, Pr6 Multi-speed settings
These parameters determine a frequency at
each operation speed when the frequency at the
operation with external signals is switched by
Output
frequency
1 speed
(high
speed)
2 speed
(middle
speed)
(Hz)
three speed levels of high, middle and low.
Factory default value
3 speed
(low
speed)
Pr4: 60Hz (High speed)
Pr5: 30Hz(Middle speed)
Pr6: 10Hz (Low speed)
Set these parameters depending on the
specification of the machine operation.
3-4
Between
RH and SD
Between
RM and SD
Between
RL and SD
Between STF
(R) and SD
ON
ON
ON
ON
3. DEMONSTRATION MACHINE OPERATION
5) Pr7 Acceleration time, Pr8 Deceleration time
These parameters determine the acceleration
Pr.20
time and deceleration time when the motor is
Operation
frequency
started and stopped.
Factory default value Pr7: 5 seconds
Time
Pr8: 5 seconds
Set these parameters depending on the
Acceleration
Pr.7
specification of the machine operation.
6) Pr9 Electronic thermal
This parameter sets the electronic thermal for the motor protection.
Set the current value to protect the motor.
Normally set the rated current value of the connected motor at 50Hz.
3-5
Deceleration
Pr.8
3. DEMONSTRATION MACHINE OPERATION
(2) Parameter setting operation method
Parameter settings are performed by the operation of the
parameter unit (PU) at an operation stop.
1) Press the PU key and select the PU operation mode.
2) Press the PrSET
SETTING MODE
0~9: Ser Pr.NO.
key to switch to the setting mode.
The
display
on
the
left
appears.
Select Oper
3) Set the predetermined parameter number with the
numeric keys.
SETTING MODE
Pr.NO.
1
When setting the numerical
key 1 .
< READ>
4) Press the
1
READ
key to read the parameter settings of the selected parameter number.
MAXf
120H Z
The current setting value is displayed.
0~120
5) Set the predetermined parameter value with the numeric keys.
When setting 6 0 with the numerical keys
1
MAXf
120H Z
60
0~120
6) Press the
1
WRITE
key to write the set parameter.
MAXf
60H Z
Completed
The parameter setting value is changed from 120 to 60 by the above operation.
3-6
3. DEMONSTRATION MACHINE OPERATION
3.1.3 Operating method
There are two types of inverter operating method, parameter unit operation (PU operation)
and external operation.
For the PU operation, an inverter can be easily operated only by the parameter unit operation
when a machine is test-operated at a startup of the machine.
For the external operation, an inverter is operated with the control signal from outside the
inverter according to the specification of the machine operation, and normally operated with a
signal from a machine control panel or a PLC.
(1) Parameter unit operation (PU operation)
Operate an inverter with the key operation of the parameter unit.
1) Press the PU key and select the PU operation.
2) Press the keys of 6 , 0 and
WRITE in order and
adjust the parameter unit display to the frequency to be
operated.
Freq Set
SET 60.00Hz
Completed
3) Press the FWD or REV
60. 00 H
STF FWD
REV key to start the motor.
Z
PU
4) When changing the operation frequency
Press
PU
,enter the operation frequency directly with the numeric keys, and
press WRITE
5) Press the
STOP
RESET
.
key to stop the operation.
Confirm the change of the motor speed for the frequency setting by performing the PU
operation above repeatedly.
3-7
3. DEMONSTRATION MACHINE OPERATION
(2) External operation
Operate an inverter with the operation switch of a
demonstration machine.
1) Select the external operation with the parameter unit.
0. 00 H
STOP
Z
EXT
2) Set the frequency setting potentiometer to the
predetermined frequency (60Hz) on the operation
panel of a demonstration machine.
60. 00 H
STF FWD
Z
EXT
3) When the operation panel switch "ᱜォ (Forward)" is
turned ON, the motor starts to rotate in the forward
direction.
When "ᱜォ (Forward)” is turned OFF, the rotation
stops.
4) Change the frequency as desired with operating the frequency setting potentiometer
on the operation panel during the rotation and check that the motor rotation is freely
changed by the inverter control.
5) The motor is rotated in the reverse direction with the operation panel switch “ㅒォ
(Reverse)”. Check the movement of the motor with the changed frequency (rotation)
as described above.
6) By turning ON/OFF the operation switches, “ 㜞 ㅦ (High speed)", “ ਛ ㅦ (Middle
speed)” and “ ૐ ㅦ (Low speed)”, the multi-speed operation is performed at the
frequency of the inverter parameter setting.
The frequency of the frequency setting potentiometer gives priority to that of the
multi-speed selection.
7) Change the acceleration/deceleration time setting in parameter Pr7 and 8 to check the
movement of the acceleration and deceleration.
3-8
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· Absolute (absolute position) encoder <Antonym; Incremental encoder>
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INVERTER SCHOOL TEXT
INVERTER BEGINNER COURSE
MODEL
MODEL
CODE
1A2P20
SH(NA)-060011ENG-A(0609)MEE
HEAD OFFICE : TOKYO BUILDING, 2-7-3 MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN
NAGOYA WORKS : 1-14 , YADA-MINAMI 5-CHOME , HIGASHI-KU, NAGOYA , JAPAN
When exported from Japan, this manual does not require application to the
Ministry of Economy, Trade and Industry for service transaction permission.
Specifications subject to change without notice.