Mitsubishi Electric FR-A700 Instruction Manual page 306

Frequency/torque setting by analog
input (terminal 1, 2, 4)
Terminal 4 functional calibration parameter
Pr. 858
Terminal
Setting Function
0 Frequency (speed)
(initial command/speed
value) limit
Magnetic flux
1
command
Stall prevention
4 operation level */
torque limit
⎯
9999
⎯ : No function
* Use Pr. 148 Stall prevention level at 0V input and Pr. 149 Stall prevention level at 10V input to adjust bias/gain of stall prevention operation level.
400
150
(-5V)
Bias
(-10V)
C16(Pr.919)
-100%
Calibration example of terminal 1
400
150
Bias
C38
(Pr.932)
0 20
0 4
Torque setting signal
C39(Pr.932)
Calibration example of terminal 4
CAUTION
· When voltage/current input specifications were switched using Pr. 73 and Pr. 267 , perform calibration without fail.
(5) Analog input display unit changing (Pr. 241)
· You can change the analog input display unit (%/V/mA) for analog input bias/gain calibration.
· Display unit of C17 (Pr. 919), C19 (Pr. 920), C39 (Pr. 932), C41 (Pr. 933) changes as follows accrding to the terminal
input specifications set in Pr. 73 and Pr. 267 .
Analog Command (terminal 1,4)
(according to Pr. 73, Pr. 267 )
0 to 5V input
0 to 10V input
0 to 20mA input
296
Bias setting
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/magnetic flux)
C39(Pr. 932) Terminal 4 bias (torque/magnetic flux)
C38(Pr. 932) Terminal 4 bias command (torque/magnetic flux)
C39(Pr. 932) Terminal 4 bias (torque/magnetic flux)
⎯
Gain
C18(Pr.920)
Initial value
0 100%
Torque setting signal
0 5V
0 10V
C17(Pr.919) C19(Pr.920)
-150
Gain
C40
(Pr.933)
Initial value
100%
20mA
C41(Pr.933)
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%)
Calibration Parameters
Pr. 126 Terminal 4 frequency setting gain frequency
C7(Pr. 905) Terminal 4 frequency setting gain
C40(Pr. 933) Terminal 4 gain command (torque/magnetic flux)
C41(Pr. 933) Terminal 4 gain (torque/magnetic flux)
C40(Pr. 933) Terminal 4 gain command (torque/magnetic flux)
C41(Pr. 933) Terminal 4 gain (torque/magnetic flux)
(3) Change the torque at maximum analog
input. (C18(Pr. 920), C40(Pr. 933))
· Set C18(Pr. 920), C40(Pr. 933) when changing only
torque setting (gain) of the maximum analog input
voltage (current).
(4) Calibration of analog input bias and gain
(C16(Pr. 919) to C19(Pr. 920), C38 (Pr. 932) to
C41 (Pr. 933))
· The "bias" and "gain" functions are used to adjust the
relationship between the input signal entered from
outside the inverter to set the torque command and
torque limit, e.g. 0 to 5V, 0 to 10V or 4 to 20mADC, and
the torque.
· Set the bias torque of terminal 1 input in C16 (Pr. 919) .
(It is factory-set to the torque at 0V)
· Set the torque in C18 (Pr. 920) for the torque command
voltage set with Pr. 73 Analog input selection.
(initial value is 10V)
· Set the bias torque of terminal 4 input in C38 (Pr. 932) .
(It is factory-set to the torque at 4mA)
· Set the torque in C40 (Pr. 933) for 20mA of the torque
command current (4 to 20mA).
· There are the following three methods to adjust the
torque setting voltage (current) bias and gain.
a) Method to adjust any point without application of
voltage (current) to across terminals 1-5(4-5)
page 297
b) Method to adjust any point without application of
voltage (current) to across terminals 1-5(4-5)
page 298
c) Method to adjust torque only without adjustment of
voltage (current)
0 to 100% → displayed in 0 to 5V (0.01V)
0 to 100% → displayed in 0 to 10V (0.01V)
0 to 100% → displayed in 0 to 20mA (0.01mA)
Gain setting
⎯
page 299
Pr. 241 = 1