Mitsubishi Electric FR-F800 Series Instruction Manual page 359

• Calibration parameter according to the terminal 4 function
Pr.858
Terminal function
setting
0 (initial
Frequency command
value)
Stall prevention operation
4
*1
level
9999 No function
*1 Use Pr.148 Stall prevention level at 0 V input and Pr.149 Stall prevention level at 10 V input to adjust bias and gain for setting the stall
prevention operation level under V/F control and Advanced magnetic flux vector control.
 Changing the frequency for the maximum analog input (Pr.125, Pr.126)
• Use Pr.125 (Pr.126) to change the frequency setting (gain) for the maximum analog input voltage (current).
(C2 (Pr.902) to C7 (Pr.905) settings do not need to be changed.)
 Analog input bias/gain calibration (C2 (Pr.902) to C7 (Pr.905), C12 (Pr.917)
to C15 (Pr.918))
• The "bias" and "gain" functions serve to adjust the relationship between a setting input signal and the output frequency. A
setting input signal is such as a 0 to 5 VDC, 0 to 10 VDC, or 4 to 20 mADC signal externally input to set the output
frequency.
• Set the bias frequency of the terminal 2 input using C2 (Pr.902). (It is initially set to the frequency at 0 V.)
• Use Pr.125 to set the output frequency to the frequency command voltage (current) set by Pr.73 Analog input selection.
• Set the bias frequency of the terminal 1 input using C12 (Pr.917). (It is initially set to the frequency at 0 V.)
• Set the gain frequency of the terminal 1 input using C14 (Pr.918). (It is initially set to the frequency at 10 V.)
• Set the bias frequency of the terminal 4 input using C5 (Pr.904). (It is initially set to the frequency at 4 mA.)
• Use Pr.126 to set the output frequency to the 20 mA input of the frequency command current (4 to 20 mA).
60Hz
(50Hz)
Bias
C2(Pr.902)
C12(Pr.917)
0
0
0
0
C3(Pr.902)
C13(Pr.917)
• There are three methods to adjust the bias/gain frequency setting voltage (current).
Adjustment by applying voltage (current) between terminals 2 and 5 (4 and 5) to set the voltage (current) at the bias/gain
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frequency.
Adjustment by selecting the voltage (current) at the bias/gain frequency without applying voltage (current) between
terminals 2 and 5 (4 and 5).
Adjustment by changing the frequency without adjusting the voltage (current).
358
5. PARAMETERS
5.9 (T) Multi-function input terminal parameters
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C5 (Pr.904) Terminal 4 frequency setting
bias frequency
C6 (Pr.904) Terminal 4 frequency setting
bias
C38 (Pr.932) Terminal 4 bias command
(torque)
C39 (Pr.932) Terminal 4 bias (torque)
—
Initial value
100%
5V
Frequency setting signal
10V
20mA
C4(Pr.903)
C15(Pr.918)
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Calibration parameter
Bias setting
60Hz
(50Hz)
Output frequency
(Hz)
Gain
Pr.125
C14(Pr.918) Bias
C5
(Pr.904)
0
0
0
0
C6(Pr.904)
Gain setting
Pr.126 Terminal 4 frequency setting gain
frequency
C7 (Pr.905) Terminal 4 frequency setting gain
C40 (Pr.933) Terminal 4 gain command
(torque)
C41 (Pr.933) Terminal 4 gain (torque)
—
Initial value
20 100%
4 20mA
Frequency setting signal
1 5V
2 10V
C7(Pr.905)
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Gain Pr.126