Analog Input Frequency (Speed) And Torque/Magnetic Flux Change And Adjustment (Calibration) - Mitsubishi Electric FR-A700 Manual

(2) Communication EEPROM write selection (Pr. 342)
Parameters written via the inverter's PU connector, RS-485
terminals, or from the communication option can be written
to the RAM. When performing parameter change frequently,
set 1 in Pr.342.
" "
(3) Modbus-RTU communication specifications
(Pr.343, Pr.549)
Pr. Setting
Number Range

343
0 (initial
value)
549
1
* Modbus-RTU protocol is valid only for communication from the FR-485
terminals.
Pr.
Pr.
125, 126, 241, C2 (902) to C7 (905),
C12 (917) to C19 (920), C38 (932) to C41 (933)
Analog input frequency (speed) and torque/
magnetic flux change and adjustment (calibration)
Pr.125 Terminal 2 frequency setting gain frequency
Pr.241 Analog input display unit switchover
C2(pr.902) Terminal 2 frequency setting bias frequency
C3(Pr.902) Terminal 2 frequency setting bias
C5(Pr.904) Terminal 4 frequency setting bias frequency
C6(Pr.904) Terminal 4 frequency setting bias
C12(Pr.917) Terminal 1 bias frequency (speed)
C14(Pr.918) Terminal 1 gain frequency (speed)
C16(Pr.919) Terminal 1 bias command (torque/magnetic flux)
C17(Pr.919) Terminal 1 bias (torque/magnetic flux)
C18(Pr.920) Terminal 1 gain command (torque/magnetic flux)
C19(Pr.920) Terminal 1 gain (torque/magnetic flux)
C38(Pr.932) Terminal 4 bias command (torque/magnetic flux)
C39(Pr.932) Terminal 4 bias (torque/magnetic flux)
C40(Pr.933) Terminal 4 gain command (torque/magnetic flux)
C41(Pr.933) Terminal 4 gain (torque/magnetic flux)
You can set the magnitude (slope) of the output frequency (speed,
torque/magnetic flux) as desired in relation to the frequency setting
signal (0 to 5VDC, 0 to 10V or 4 to 20mA).
(1) Change the frequency (speed) at maximum analog
input. (Pr.125, Pr.126, C14(Pr.918))
Set a value in Pr.125(Pr.126, C14(Pr.918)) when changing only
the frequency setting (gain) of the maximum analog input
voltage (current). (Other calibration parameter settings need not
be changed.)
(2) Change the torque/magnetic flux at maximum analog
input. (C18 (Pr.920), C40 (Pr.933))
Set C18(Pr.920), C40(Pr.933) when changing only torque/
magnetic flux command of the maximum analog input
voltage (current). (Other calibration parameter settings need
not be changed.)
57
When setting parameters, refer to the instruction manual (applied) and understand instructions.
Description
Display the number of communication errors
during Modbus-RTU communication. Reading only
Mitsubishi inverter (computer link operation)
protocol
Modbus-RTU protocol
Pr.126 Terminal 4 frequency setting gain frequency
C4(Pr.903) Terminal 2 frequency setting gain
C7(Pr.905) Terminal 4 frequency setting gain
C13(Pr.917) Terminal 1 bias (speed)
C15(Pr.918) Terminal 1 gain (speed)
(3) Analog input bias/gain calibration
(C2 (Pr.902) to C7 (Pr.905), 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 output frequency (torque/magnetic
flux), e.g. 0 to 5V, 0 to 10V or 4 to 20mADC, and the output
frequency (torque/magnetic flux).
60Hz
Bias
C2(Pr.902)
C12(Pr.917)
0
0 Frequency setting signal
0
C3(Pr.902)
C13(Pr.917)
Initial value
60Hz
Bias
C5
(Pr.904)
0 20
0 4 Frequency setting signal
C6 (Pr.904)
400
150
(-5V)
Bias
(-10V)
C16(Pr.919)
-100%
0
0
0
C17(Pr.919)
-150
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
(4) Analog input display unit changing (Pr.241)
⋅ You can change the analog input display unit (%/V/mA) for
analog input bias/gain calibration.
Initial value
Gain
Pr.125
C14(Pr.918)
100%
5V
10V
C4(Pr.903)
C15(Pr.918)
Pr.126
Gain
100%
20mA
(Pr.905)
C7
Gain
C18(Pr.920)
Initial value
100%
Torque setting signal
5V
10V
C19(Pr.920)
Gain
C40
(Pr.933)
Initial value
100%
20mA
C41(Pr.933)