•
Setting Operation Conditions
Reverse run prohibit (n006)
“Reverse run prohibit” setting does not accept a reverse run command from the control circuit terminal or digital operator. This setting is used for applications where a reverse run command can cause problems.
Setting
0
1
Description
Reverse run enabled
Reverse run disabled
Multi-step speed selection
By combining frequency reference and input terminal function selections, up to 16 steps of speed can be set.
8-step speed change n003=1 (operation mode selection) n004=1 (Frequency reference selection) n024=25.0Hz (Frequency reference 1) n025=30.0Hz (Frequency reference 2) n026=35.0Hz (Frequency reference 3) n027=40.0Hz (Frequency reference 4) n028=45.0Hz (Frequency reference 5) n029=50.0Hz (Frequency reference 6) n030=55.0Hz (Frequency reference 7) n031=60.0Hz (Frequency reference 8)
NOTE
When all multi-step speed inputs are open, frequency reference selected by parameter n004 (frequency reference selection) becomes effective.
Only when multi-step speed input ref. 1 is closed and n077=1, the effective frequency reference becomes the CN2 analog input signal.
n054=6 (Multi-function contact input terminal 5) n055=7 (Multi-function contact input terminal 6) n056=8 (Multi-function contact input terminal 7) n053=1 n050=1 (Input terminal S1 ) Initial Setting n051=2 (Input terminal S2 ) Initial Setting n052=3 (Input terminal S3) Initial Setting n053=5 (Input terminal S4 ) Initial Setting n054=6 (Input terminal S5 ) Initial Setting n055=7 (Input terminal S6 ) Initial Setting n056=10 (Input terminal S7 ) Change the Setting to 8
50
Additional settings for 16-Step speed operation
Set n120 ~ n127 to frequency reference 9-16.
A multi-function input must be set to multi-step speed reference 4 (n050 ~ n056 = 9).
Operating at low speed
By inputting a jog command and then a forward (reverse) run command, operation is enabled at the jog frequency set in n032. When multi-step speed references 1, 2, 3 or 4 are inputted simultaneously with the jog command, the jog command has priority.
Parameter No.
n032 n050 to n056
Name
Jog frequency reference
Jog command
Setting
Factory setting : 6.00Hz
Set to “10” for any parameter.
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•
Adjusting speed setting signal
To provide frequency reference by analog input of control circuit terminal FR and
FC, the relationship between analog input and frequency reference can be set.
FREQUENCY REFERENCE
(a) Analog frequency reference gain (n060)
The frequency reference provided when analog input is 10V(20mA) can be set in units of 1%. (maximum output frequency n011=100%)
∗ Factory setting : 100%
(b) Analog frequency reference bias (n061)
The frequency reference provided when analog input is 0V (4mA or 0mA) can be set in units of 1%. (Maximum output frequency n011=100%)
∗ Factory setting : 0%
Typical setting
• To operate the inverter with frequency reference of 0% to 100% at 0 to
5V input
52
• To operate the inverter with frequency reference of 50% to 100% at 0 to
10V input
53
Adjusting frequency upper and lower limits
• Frequency reference upper limit (n033)
Sets the upper limit of the frequency reference in units of 1%.
(n011: Maximum output frequency = 100%)
Factory setting: 100%
• Frequency reference lower limit (n034)
Sets the lower limit of the frequency reference in units of 1%.
(n011: Maximum output frequency = 100%)
When operating at frequency reference 0, operation is continued at the frequency reference lower limit.
However, when frequency reference lower limit is set to less than the minimum output frequency (n016), operation is not performed.
Factory setting: 0%
Using two accel/decel times
*When “deceleration to a stop” is selected (n005=0).
By setting “Multifunction Input Selection” (either of n050 to n056) to “11 (accel/decel time select)”, accel/decel time is selected by turning ON/OFF the accel/decel time select (terminal S1 to S7).
At OFF : n019 (accel time 1) n020 (decel time 1)
At ON : n021 (accel time 2) n022 (decel time 2)
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No.
n019 n020 n021 n022 n018 setting
Name
Accel time 1
Decel time 1
Accel time 2
Decel time 2 n018
No.
0
1
Unit
0.1s
1s
0.01s
0.1s
Unit
Refer to n018 setting
Setting Range Initial setting
Refer to n018 setting
10.0s
10.0s
10.0s
10.0s
Setting Range
0.0 - 999.9s (999.9s or less)
1000 - 6000s (1000s or more)
0.00 - 99.99s (99.99s or less)
100.0 - 600.0s (100s or more)
Notes: Parameter n018 can be set during stop.
If the numeric value exceeded 600.0 sec. is set for the accel/decel time when n018 = 0 (in units
of 0.1 sec.). “1” cannot be set to n018.
• Accel time
Set the time needed for output frequency to reach 100% from 0%.
• Decel time
Set the time needed for output frequency to reach 0% from 100%.
(Maximum output frequency n011 = 100%)
Automatic restart after momentary power loss (n081)
When parameter n081 is set to 1 or 2, operation automatically restarts even if momentary power loss occurs.
Setting.
0
1*
2* =
Description
Continuous operation after momentary power loss not provided.
Continuous operation after power recovery within momentary power loss ride thru time 0.5s.
Continuous operation after power recovery (Fault output not provided)
* Hold the operation command to continue the operation after recovery from a momentary power loss.
= When 2 is selected, the inverter restarts if power supply voltage recovers while the control power supply is held.
No fault signal is output.
55
Soft-start characteristics (n023)
To prevent shock at machine start/stop, accel/decel can be performed in S-curve pattern.
Setting
0
1
2
3
S-curve characteristic time
S-curve characteristic not provided
0.2 second
0.5 second
1.0 second
Note: The S-curve characteristics time is the time from accel/decel rate 0 to a regular accel/decel rate determined by the set accel/decel time.
The following time chart shows FWD/REV run switching at deceleration to a stop.
56
Torque detection
If an excessive load is applied to the machine, the resultant output current increase can be compared to the threshold setting of parameter n098, then output alarm signals to multi-function output terminals MA, MB, P1 and P2.
To output an overtorque detection signal, set output terminal function selection n057 to n059 to “overtorque detection” [Setting:6 (NO contact) or 7 (NC contact)].
∗ Overtorque detection release width (hysterisis) is set at approx. 5% of inverter rated current.
57
• Overtorque detection function selection 1 (n096)
Setting
0
1
2
3
4
Description
Overtorque detection not provided
Detected during parameter-speed running, and operation continues after detection.
Detected during parameter-speed running, and operation stops during detection.
Detected during running, and operation continues after detection.
Detected during running, and operation stops during detection.
(1) To detect overtorque at accel/decel, set to 3 or 4.
(2) To continue the operation after overtorque detection, set to 1 or 3.
During detection, the operator displays “ ” alarm (blinking).
(3) To halt inverter by a fault at overtorque detection, set to 2 or 4. At detection, the operator displays “ ” fault (ON).
• Overtorque detection level (n098)
Sets the overtorque detection current level in units of 1%. (Inverter rated current =
100%) When detection by torque is selected, motor rated torque becomes 100%.
Factory setting: 160%
• Overtorque detection time (n099)
If the time when the motor current exceeds the overtorque detection current level
(n098) is longer than overtorque detection time (n099), the overtorque detection function operates.
Factory setting: 0.1sec.
• Overtorque detection function selection 2 (n097)
When vector control mode is selected, overtorque detection can be performed either by output current or by output torque.
When V/f control mode is selected, n097 setting becomes invalid, and overtorque is detected by output current.
Setting
0
1
Description
Detected by output torque
Detected by output current
58
Frequency detection (n095)
Effective when either of output terminal function selections n057, n058 or n059 are set to “frequency detection” (setting: 4 or 5). “Frequency detection” turns ON when output frequency is higher or lower than the frequency detection level (n095).
• Frequency detection1
Output frequency > Frequency detection level n095
(Set either of n057, n058 or n059 to “4”.)
• Frequency detection2
Output frequency < Frequency detection level n095
(Set either of n057, n058 or n059 to “5”.)
59
Jump frequencies (n083 to n086)
This function allows the prohibition or “jumping” of critical frequencies so that the motor can operate without resonance caused by machine systems. This function is also used for dead band control. Setting the value to 0.00Hz disables this function.
Set prohibited frequency 1, 2 or 3 as follows: n083 > n084 > n085
If this condition is not satisfied the inverter displays for one second and restores the data to original settings.
Operation is prohibited within jump frequency range.
However, motor operates smoothly (without jumping) during accel/decel.
Continuing operation by automatic fault reset (n082)
Sets the inverter to restart and reset fault detection after a fault occurs.
The number of self-diagnosis and retry attempts can be set at n082 up to 10.
The inverter automatically restarts after the following faults occur:
• OC (over current)
• OV (over voltage)
The number of retry attempts are cleared to 0 during the following cases:
(1) If no other fault occurs within 10 minutes after retry
(2) When the fault reset signal is ON after the fault is detected
(3) Power supply is turned OFF
60
• Cumulative Operation Time Selection (n087)
Setting
0
1
Description
Inverter power-on time
(Counts the elapsed time that there is an inverter output)
Inverter running time
(Counts the elapsed time that there is an inverter output.)
Cumulative operation time setting.
Inverter operating time set with parameter n087 is accumulated by the unit of 10H.
Accumulation starts from the time set with parameter n088.
Parameter No.
n088
Name
Cumulative operation
Unit
1 = 10H
Setting Range
0 to 6550 (65500H)
Initial
Setting
0 (H)
• Installed Braking Resistor Overheating protection Selection (n165) Set
“0” when braking resistor is not connected.
Setting
0
1
Description
Overheating protection is not provided
Overheating protection is provided
61
• Input / Output Open Phase Protection
Parameters
No.
Name Unit n166
Input open-phase
detection level
1% n167 n168
Input open-phase
detection time
Output open-phase
detection level
1 sec.
1% n169
Output open-phase
detection time
*1 0% setting - no detection
*2 0.0 sec setting - no detection
0.1 sec.
• Recommended set values: 7% for n166
10sec. for n167
5% for n168
0.2sec. for n169
Setting
Range
0 to 100% *1
400.0V/100%
(for 200V class)
800.0V/100%
(for 400V class)
0 to 255 sec. *2
0 to 100% *1
Inverter rated output current value/100%
0.0 to 2.0 sec *2
Initial
Setting
0%
0 sec.
0%
0.0 sec.
62
• Speed search command
Restarts a coasting motor without stopping it. This function enables smooth switching between motor commercial power supply operation and inverter operation.
Set input terminal function selection (n050 to n056) to “14” (search command from maximum output frequency) or “15” (search command from set frequency).
Build a sequence so that FWD (REV) run command is input at the same time as the search command or after the search command. If the run command is input before the search command, the search command becomes disabled.
• Time chart at search command input
Set declaration time during a speed search at parameter n101. Speed search starts when inverter output current > speed search operation level.
This function applies to the 200/400V class 7.5/10hp inverters.
63
Holding accel/decel temporarily
To hold acceleration or deceleration, input accel/decel hold command. The output frequency is maintained when the accel/decel hold command is input during acceleration or deceleration.
When the stop command is input during accel/decel prohibition command input, accel/ decel hold is released and operation ramps to stop.
Set multi-function input terminal selection (n050 to n056) to 16 (accel/decel hold command).
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Using frequency meter or ammeter (n066)
Selects the function to be monitored at analog output terminals AM-AC.
Setting
0
1
4
5
2
3
Description
Output frequency
Output current
Main circuit DC voltage
Torque monitor
Output power
Output voltage reference
In initial setting, analog voltage of approx. 10V is output when output frequency
(output current) is 100%.
Calibrating frequency meter or ammeter (n067)
Used to adjust analog output gain.
Set the analog output voltage at 100% of output frequency (output current). Frequency meter displays 0 to 60Hz at 0 to 3V.
10V
× n067 Setting
0.30
= 3V
Output frequency becomes
100% at this value
65
Using analog output (AM-AC) as a pulse train signal output (n065)
Analog output AM-AC can be used as a pulse train output (output frequency monitor).
Set n065 to 1 when using pulse train output.
Parameters No.
n065
Name
Monitor output type selection
Unit
1
Setting range
0,1
Initial Setting
0 n065 setting n065 Setting
0
1
Analog monitor output
Pulse monitor output
(Output frequency monitor)
Pulse train signal can be selected by setting n150.
n150 Setting
0
1
Description
1440Hz / Max. frequency (n011)
1F: Output frequency x 1
6
12
24
36
6F: Output frequency x 6
12F: Output frequency x 12
24F: Output frequency x 24
36F: Output frequency x36
At the factory setting the pulse of 1440Hz can be output when output frequency is
100%
Pulse monitor output can be adjusted with the parameter n067.
66
NOTE
Peripheral devices must be connected according to the following load conditions when using pulse monitor output. The machine might be damaged when the conditions are not satisfied.
Used as a sourcing output
Output voltage
VRL (V)
Load impendance
(k
Ω)
+5V
+8V
+8V
1.5 k
Ω
or more
3.5 k
Ω or more
10 k
Ω or more
Used as a sinking input
External power supply (V)
Sinking current (mA)
+12VDC+5%
16mA or less
67
Reducing motor noise leakage current (n080)
Set inverter output transistor switching frequency (carrier frequency).
Setting
2
3
4
9
1
7
8
Carrier Frequency (kHz)
12 fout
24 fout
36 fout
2.5
5.0
7.5
10.0
(Hz)
(Hz)
(Hz)
(kHz)
(kHz)
(kHz)
(kHz)
Metallic Noise from Motor
Noise and Current
Leakage
Higher Smaller
Not audible
Larger
Setting values 7, 8, or 9 multiplies output frequency according to output frequency value.
fout = O U T P U T
F R E Q U E N C Y fou t = O U T P U T
F R E Q U E N C Y fo ut = O U T P U T
F R E Q U E N C Y
68
Reducing Motor Noise or Leakage Current (n080)
Frequency setting varies according to inverter capacity (kVA).
Voltage Class (V)
200
Single-phase 3phase
400
3-phase
Capacity
(kW)
1.5
2.2
3.0
3.7
7.5
0.2
0.4
0.7
5.5
7.5
1.5
2.2
3.7
5.5
0.1
4
0.2 4
0.4 4
0.7 4
3
3
3
3
3
3
3
3
3
3
3
3
3
3
Initial Setting
Setting
Carrier
Frequency
7.5kHz
7.5kHz
7.5kHz
7.5kHz
7.5kHz
7.5kHz
7.5kHz
7.5kHz
7.5kHz
7.5kHz
10kHz
10kHz
10kHz
10kHz
7.5kHz
7.5kHz
7.5kHz
7.5kHz
Maximum
Continuous
Output Current
(A)
0.8
1.6
3.0
5.0
8.0
11.0
17.5
25
33
1.2
1.8
3.4
4.8
5.5
7.2
8.6
14.8
18
Reduced
Current (A)
–
4.0
4.8
6.3
8.1
*
17
7.0
10.0
16.5
23
30
1.0
1.6
3.0
(1) Reduce continuous output current when changing carrier frequency to
4 (10kHz) for the 200V class (1.5 W or more) and 400V class inverters. Refer to the table above for the reduced current.
[Operation Condition]
•Input power supply voltage : 3-phase 200 to 230 V (200V class)
Single-Phase 200 to 240V (200V class)
3-Phase 380 to 460V (400V class)
•Ambient temperature: 14 to 122ºF (-10 to +50ºC)
(Protection structure: open chassis type
IP20)
(2) If the wiring distance is long, reduce the inverter carrier frequency as described below
Wiring Distance between
Inverter and Motor
Carrier frequency
(n080 setting)
Up to 50m
10kHz or less
(n080=1, 2, 3, 4, 7, 8, 9)
Up to 100m
5kHz or less
(n080=1, 2, 7, 8, 9)
More than 100m
2.5kHz or less
(n080=1, 7, 8, 9,)
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(3) Set carrier frequency (n080) to either 1, 2, 3, 4 when using vector control mode. Do not set to 7, 8, or 9.
(4) Carrier frequency is automatically reduced to 2.5kHz when reducing carrier frequency selection at low speed (n175) is set to 1 and the following conditions are satisfied:
Output frequency < 5 Hz
Output current > 110%
Factory setting : 0 (Disabled)
Operator stop key selection (n007)
Selects processing when STOP key is pressed during operation either from multi-function input terminal or communications.
Setting
0
1
Description
STOP key effective when running either from multi-function input terminals or communications.
When STOP key is pressed, the inverter stops according to the setting of the parameter n005.
At this time, the digital operator displays “ “ alarm (blinking). This stop command is held in the inverter until both forward and reverse run commands are open, or until run command from communications becomes zero.
STOP key is ineffective when running either from multi-function input terminals or communications.
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