Mitsubishi Electric FR-F740-00023 Instruction Manual page 172

50Hz
Bias
C2
(Pr. 902)
0
0
Frequency setting signal
0
C3 (Pr. 902)
50Hz
Bias
C5
(Pr. 904)
0 20
0 4 Frequency setting signal
C6 (Pr. 904)
CAUTION
When the terminal 2 is calibrated to change the inclination of the set frequency, the setting of the terminal 1 is also changed.
When a voltage is input to the terminal 1 to make calibration, (terminal 2 (4) analog value + terminal 1 analog value) is the analog
calibration value.
When the voltage/current input specifications were changed using Pr. 73 and Pr. 267, be sure to make calibration.
(3) Analog input display unit changing (Pr. 241)
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 and Pr. 267, the display units of C3 (Pr. 902), C4 (Pr. 903),
C6 (Pr. 904) C7 (Pr. 905) change as shown below.
Analog Command
(terminal 2, 4)
(according to Pr. 73, Pr. 267 )
0 to 5V input
0 to 10V input
4 to 20mA input
REMARKS
Analog input display is not displayed correctly if voltage is applied to terminal 1 when terminal 1 input specifications (0 to ±5V, 0
to ±10V) and 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 terminal 1 respectively in the initial status.
Set "0" (initial value is 0% display) in Pr. 241 to use.
Initial value
Gain Pr.125
100%
5V
10V
C4 (Pr. 903)
Initial value
Gain
100%
20mA
C7 (Pr. 905)
Pr. 241 = 0 (initial value)
0 to 5V displayed in 0 to 100%(0.1%).
0 to 10V displayed in 0 to 100%(0.1%).
0 to 20mA displayed in 0 to 100%(0.1%).
Frequency setting by analog input (terminal 1, 2, 4)
(1) Change the
analog input. (Pr. 125, Pr. 126)
Set a value in Pr. 125 (Pr. 126) when changing only
the frequency setting (gain) of the maximum analog
input power (current). (C2 (Pr. 902) to C7 (Pr. 905)
setting need not be changed)
(2) Analog input bias/gain calibration (C2(Pr.
902) to C7(Pr. 905), )
The "bias" and "gain" functions are used to adjust the
relationship between the input signal entered from
outside the inverter to set the output frequency, e.g. 0
to 5V, 0 to 10V or 0 to 20mADC, and the output
frequency.
Set the bias frequency of the terminal 2 input using
C2 (Pr. 902). (initial set to the frequency at 0V)
Using Pr. 125, set the output frequency relative to the
frequency command voltage (current) set in Pr. 73
Analog input selection.
Set the bias frequency of the terminal 4 input using
C5 (Pr. 904). (initial set to the frequency at 4mA)
Using Pr. 126, set the output frequency relative to
20mA of the frequency command current (0 to
20mA).
There are three methods to adjust the frequency
Pr. 126
setting voltage (current) bias/gain.
(a) Method to adjust any point by application of
voltage (current) to across the terminals 2-5 (4-5).
page 164
(b) Method to adjust any point without application of a
voltage (current) to across terminals 2-5(4-5).
page 165
(c) Adjusting only the frequency without adjusting the
voltage (current).
0 to 100%
0 to 100%
0 to 100%
frequency at maximum
page 166
Pr. 241 = 1
displayed in 0 to 5V(0.01V).
displayed in 0 to 10V(0.01V).
displayed in 0 to 20mA(0.01mA).
4
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