Initial Setting - Mitsubishi Electric FR-A700 Technical Manual

(7) Bias and gain of frequency setting voltage
(current) [Pr. 125, 126, 241, C2 to C7(Pr. 902 to
905), C30 to C33* (Pr. 926, 927)]
(Available in
A700
You can set the magnitude (slope) of the output
frequency as desired in relation to the frequency
setting signal (0 to 5VDC, 0 to 10VDC or 4 to
20mADC).
Refer to the following diagram for the relationships
between the frequency setting signal and output
frequencies. When
compensation, terminal 2 (4) analog value + terminal
1 analog value is the analog calibration value.
60Hz
Bias
[C2 (Pr. 902)]
0
0
Frequency setting signal
0
[C3 (Pr. 902)]
60Hz
Bias
[C5 (Pr. 904)]
0 20
0 4 Frequency setting signal
[C6 (Pr. 904)]
1) Change the frequency at maximum analog input
Set a value in [Pr. 125 (126)] when changing only
the frequency setting (gain) of the maximum
analog input voltage (current). [(C2 (Pr. 902) to C7
(Pr. 905)] setting need not be changed. Set a value
in [C32 (Pr. 927)] when using terminal 6 in
with FR-A7AZ.
[Pr. ] Name
125(903) Terminal 2 frequency setting gain frequency
126(905) Terminal 4 frequency setting gain frequency
241 Analog input display unit switchover
C2(902) Terminal 2 frequency setting bias frequency
C3(902) Terminal 2 frequency setting bias
C4(903) Terminal 2 frequency setting gain
C5(904) Terminal 4 frequency setting bias frequency
C6(904) Terminal 4 frequency setting bias
C7(905) Terminal 4 frequency setting gain
C30(926) Terminal 6 bias frequency (speed)
C31(926) Terminal 6 bias (speed)
C32(927) Terminal 6 gain frequency (speed)
C33(927) Terminal 6 gain (speed)
common
with FR-A7AZ.)
using terminal 1
Initial value
Gain
[Pr. 125 (903)]
100%
5V
10V
[C4 (Pr. 903)]
Initial value
[Pr. 126 (905)]
Gain
100%
20mA
[C7 (Pr. 905)]
Initial
Value
60Hz
60Hz
0
0Hz
0%
100%
0Hz
20%
100%
0Hz
0%
60Hz
100%
2) Calibration of analog input bias and gain
As for voltage between frequency setting power
supply terminal 10 (10E) and terminal 5, and input
impedance of analog input terminal, there are
variability in each inverters. Therefore exact
output frequency for the frequency setting input is
different in each inverters. When using a common
frequency setting input for multiple inverters,
calibration of frequency setting bias [C3 (C6)] and
gain [C4(C7)] is required for each inverters.
When applying voltage (current) for calibration,
the difference of the frequency setting input
added
voltage (current) of [C3] and [C4] ([C6] and [C7])
should be 0.5V (2mA) or more. If the difference is
0.5V (2mA) or less, a setting error will occur.
Calibrate with [C31 to C33 (Pr. 926, 927)] when using
terminal 6 in
3) Analog input display unit changing
You can change the analog input display unit (%/
V/mA) for analog input bias/gain calibration.
Depending on the terminal input specification set
to [Pr. 73], [Pr. 267], the display units of [C3(Pr.
902)], [C4(Pr. 903)], [C6(Pr. 904)], [C7(Pr. 905)],
[C31(Pr. 926)], [C33(Pr. 927)] change as shown
below.
Analog
Command
(terminal 2, 4)
[Pr. 73, 267]
0 to 5V input
0 to 10V input
0 to 20mA input
Analog input display is not displayed correctly if
voltage is applied to terminal 1 when terminal 1
input specifications (0 to
main speed (terminal 2, terminal 4 input)
specifications (0 to 5V, 0 to 10V, 0 to 20mA) differ.
(For example, 5V (100%) is analog displayed
when 0V and 10V are applied to terminal 2 and
A700
terminal 1 respectively in the initial status.)
In this case, set [Pr. 241 = 0] (% display).
Setting
Range
0 to 400Hz Set the frequency of terminal 2 input gain (maximum).
0 to 400Hz Set the frequency of terminal 4 input gain (maximum).
0 Displayed in %
1 Displayed in V/mA
0 to 400Hz Set the frequency on the bias side of terminal 2 input.
0 to 300% Set the converted % of the bias side voltage (current) of terminal 2 input.
0 to 300% Set the converted % of the gain side voltage of terminal 2 input.
0 to 400Hz Set the frequency on the bias side of terminal 4 input.
0 to 300% Set the converted % of the bias side current (voltage) of terminal 4 input.
0 to 300% Set the converted % of the gain side current (voltage) of terminal 4 input.
0 to 400Hz Set the frequency on the bias side of terminal 6 input.
0 to 300% Set the converted % on the bias side voltage of terminal 6 input.
0 to 400Hz Set the frequency on the gain side of terminal 6 input.
0 to 300% Set the converted % on the gain side voltage of terminal 6 input.
224
PARAMETER
with FR-A7AZ.
A700
[Pr. 241 = 0]
[Pr. 241 = 1]
(initial value)
Displayed in 0 to 100% Displayed in 0 to 5V
(0.1% increments) (0.01V increments)
Displayed in 0 to 100% Displayed in 0 to 10V
(0.1% increments) (0.01V increments)
Displayed in 0 to 100% Displayed in 0 to 20mA
(0.1% increments) (0.01mA increments)
5V, 0 to
Description
Selects the unit for analog input display.
10V) and