Carrier Frequency And Softpwm Selection; Analog Input Selection; Response Level Of Analog Input - Mitsubishi Electric FR-A700 Manual

Pr.
Pr.
72, 240

Carrier frequency and SoftPWM selection

Pr.72 PWM frequency selection
You can change the motor sound.
Setting
Pr.Number
Range
Note that 0 indicates 0.7kHz, 15 indicates 14.5kHz and 25
indicates 2.5kHz. (Set 25 when using an optional sine wave
0 to 15/
filter.)
72
0 to 6, 25
The following settings are for real sensorless vector control or
*
vector control.
0 to 5: 2kHz, 6 to 9: 6kHz, 10 to 13: 10kHz, 14 and 15: 14kHz
0
Soft-PWM is invalid
240
" "
When 0 to 5 ("0 to 4" for the 75K or more.) is set in Pr.72,
1
Soft-PWM is valid
* The setting range depends on the inverter capacity. (55K or less/75K or
more)
Pr.
Pr.
73, 242, 243, 252, 253, 267

Analog input selection

Pr.73 Analog input selection
Pr.242 Terminal 1 added compensation amount (terminal 2)
Pr.243 Terminal 1 added compensation amount (terminal 4)
Pr.252 Override bias
Pr.267 Terminal 4 input selection
You can select the function that switches between forward rotation
and reverse rotation according to the analog input terminal
specifications, override function and input signal polarity.
For the terminals 1, 2, 4 used for analog input, voltage input (0 to 5V,
0 to 10V) or current input (4 to 20mA) can be selected.
The additional compensation and fixed ratio of analog compensation
(override) using terminal 2 as an auxiliary input can be made to
multi-speed operation or the speed setting signal (main speed) of
the terminal 2 or terminal 4. (
setting)
Pr.73 Terminal Terminal Terminal 4
Setting 2 Input 1 Input
0 0 to 10V 0 to ±10V
1
(initial 0 to 5V 0 to ±10V
value)
2 0 to 10V 0 to ±5V
3 0 to 5V 0 to ±5V
4 0 to 10V 0 to ±10V
5 0 to 5V 0 to ±5V
6 4 to 20mA 0 to ±10V
When the AU
signal is off
7 4 to 20mA 0 to ±5V
10 0 to 10V 0 to ±10V
11 0 to 5V 0 to ±10V
12 0 to 10V 0 to ±5V
13 0 to 5V 0 to ±5V
14 0 to 10V 0 to ±10V
15 0 to 5V 0 to ±5V
16 4 to 20mA 0 to ±10V
17 4 to 20mA 0 to ±5V
0 0 to ±10V
1
(initial 0 to ±10V
×
value)
2 0 to ±5V
3 0 to ±5V
4 0 to 10V
×
When the AU
5 0 to 5V
signal is on
6 0 to ±10V
According to the
×
Pr.267 setting
7 0 to ±5V
0:4 to 20mA (initial
10 0 to ±10V
1:0 to 5V
11 0 to ±10V
2:0 to 10V
×
12 0 to ±5V
13 0 to±5V
14 0 to 10V
×
15 0 to 5V
16 0 to ±10V
×
17 0 to ±5V
When setting parameters, refer to the instruction manual (applied) and understand instructions.
Pr.240 Soft-PWM operation selection
Description
Pr.253 Override gain
indicates the main speed
Compensa-
tion Input
Terminal Polarity
Input and Com- Reversible
pensation
Method
Terminal 1
added
Not function
compensation
(Indicates that a
frequency
command signal
of negative
polarity is not
Terminal 2
accepted.)
override
×
Terminal 1
added
compensation
Function
Terminal 2
override
Terminal 1
added
compensation
Terminal 1
added
Not function
compensation
(Indicates that a
frequency
command signal
of negative
polarity is not
Terminal 2
accepted.)
override
Terminal 1
value)
added
compensation
Function
Terminal 2
override
Terminal 1
added
compensation
(1) Added compensation (Pr.242, Pr.243)
⋅
The compensation signal can be added to the main speed
setting for synchronous/continuous
operation, etc.
Output frequency
When voltage across
terminals 2-5 is 2.5V
(5V)
When voltage
across terminals
2-5 is 0V
-5V -2.5V 0 +2.5V +5V Terminal 1
(-10V) (-5V) (+5V) (+10V)
Forward rotation
STF signal
STF signal
is ON
is ON
STF signal
Forward rotation
is ON
STF signal
is ON
(a) When Pr. 73 setting is 0 to 5
⋅
The terminal 1 (frequency setting auxiliary input) signal is
added to the main speed setting signal of terminal 2 or 4.
(2) Override function (Pr. 252, Pr. 253)
⋅ When an override is selected, the terminal 1 or terminal 4
is used for the main speed setting and the terminal 2 for
the override signal. (When the main speed of the terminal
1 or terminal 4 is not input, compensation by the terminal 2
is made invalid.)
200
150
Pr.252
100
Pr.253
50
0
0V
Voltage across terminals 2-5
⋅ When "4" is set in Pr.868 (Pr.865) , the setting of terminal 1
(terminal 4) is used for stall prevention operation level
setting.
Pr.
Pr.
74, 822, 826, 832, 836, 849

Response level of analog input

Pr.74 Input filter time constant
Pr.826 Torque setting filter 1
Pr.836 Torque setting filter 2
The time constant of the primary delay filter relative to external
frequency command (analog input (terminal 1, 2, 4) signal) can
be set.
⋅
Effective for filtering noise in the frequency setting circuit.
⋅
Increase the filter time constant if steady operation cannot be
performed due to noise.
A larger setting results in slower response. (The time constant
can be set between approximately 10ms to 1s with the setting
of 0 to 8.)
⋅
Set the time constant of the primary delay filter relative to the
external speed command (analog input command) using
Pr.822 and Pr.832 .
Set a large time constant when you want to delay the tracking
of the speed command, when the analog input voltage
fluctuates, etc.
⋅ Set the time constant of the primary delay filter relative to the
external torque command (analog input command) using
Pr.826 and Pr.836 .
Set a large time constant value when you want to delay the
tracking of the torque command, when the analog input
voltage fluctuates, etc.
⋅ Pr.832 Speed setting filter 2 and Pr.836 Torque setting filter 2 are
valid when a value other than "9999" is set and the RT signal
is on.
Setting Pr.849 provides frequency command by analog input
(terminal 2) with offset and avoids frequency command to be
given due to noise under 0 speed command.
speed control
Output frequency
When voltage across
terminals 2-5 is 2.5V
(5V)
When voltage
across terminals
2-5 is 0V
-5V -2.5V 0 +2.5V +5V Terminal 1
(-10V) (-5V) (+5V) (+10V)
Reverse rotation Forward rotation
Reverse rotation Forward rotation
(b) When Pr. 73 setting is 10 to 15
Initial value
(50% to 150%)
2.5V 5V
(5V) (10V)
Pr.822 Speed setting filter 1
Pr.832 Speed setting filter 2
Pr.849 Analog input offset adjustment
52