Mitsubishi Electric FR-F800 Series Instruction Manual page 365

• Calibration parameter according to the terminal 4 function
Pr.858
setting
0 (initial
Frequency (speed) command
value)
Stall prevention operation
4
*2
level
9999 No function
*2 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 torque for the maximum analog input (C18 (Pr.920), C40
(Pr.933))
• Use C18 (Pr.920) or C40 (Pr.933) to change the stall prevention operation level setting (gain) of the maximum analog input
voltage (current).
 Analog input bias/gain calibration (C16 (Pr.919) to C19 (Pr.920), C38
(Pr.932) to C41 (Pr.933))
• "Bias"/"gain" function can adjust the relation between the stall prevention operation level and the setting input signal.
Examples of setting input signals are 0 to 5 VDC, 0 to 10 VDC, or 4 to 20 mADC, and they are externally input.
• Set the bias value of the terminal 1 input using C16 (Pr.919). (Shipped from factory with the stall prevention operation level
for 0 V)
• Use C18 (Pr.920) to set the stall prevention operation level against the input voltage set by Pr.73 Analog input selection.
(The initial value is 10 V.)
• Set the bias value of the terminal 4 input using C38 (Pr.932). (The initial value is the stall prevention operation level for 4
mA.)
• Use C40 (Pr.933) to set the stall prevention operation level against the 20 mA input of the input current (4 to 20 mA).
(-5V)
Bias
(-10V)
C16(Pr.919)
-100%
Calibration example of terminal 1
*1 If a negative command is given, the stall prevention operation level is regarded as "0".
• There are three methods to adjust the bias/gain for voltage (current) setting.
Adjustment by applying voltage (current) between terminals 1 and 5 (4 and 5) to set the voltage (current) at the bias/gain
page 366
level.
Adjustment by selecting the voltage (current) at the bias/gain level without applying voltage (current) between terminals 1
and 5 (4 and 5).
Adjustment by changing the stall prevention operation level only without adjusting the voltage (current).
NOTE
• Always calibrate the input after changing the voltage/current input signal with Pr.73 (Pr.267) and the voltage/current input
selection switch.
364
5. PARAMETERS
5.9 (T) Multi-function input terminal parameters
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Terminal function
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)
—
400
150
Initial value
0
0
Torque setting signal
0
C17(Pr.919)
-150
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Calibration parameter
Bias setting
400
Gain
150
C18(Pr.920)
Bias
100%
5V
C38
10V
(Pr.932)
C19(Pr.920)
0
0
C39(Pr.932)
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
4
Torque setting signal
Calibration example of terminal 4
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Gain
C40
(Pr.933)
100%
20mA
C41(Pr.933)