Bias And Gain Of Torque (Magnetic Flux) Setting Voltage (Current) [Pr. 241, C16 (Pr. 919) To C19 (Pr. 920), C38 (Pr. 932) To C41 (Pr. 933)] - Mitsubishi Electric FR-A700 Instruction Manual

Parameter
6.20.6 Bias and gain of torque (magnetic flux) setting voltage (current) [Pr. 241,
C16 (Pr. 919) to C19 (Pr. 920), C38 (Pr. 932) to C41 (Pr. 933)]
You can set the magnitude (slope) of the torque as desired in relation to the torque setting signal
(0 to 5VDC, 0 to 10V or 4 to 20mA).
These parameters can be used to configure the inverter precisely for set point signals that either
exceed or do not quite reach 5V or 10V or 20mA. These settings can also be used to configure
inverse control (i.e. high output torque at minimum set point signal, minimum output torque at
maximum set point signal)
Pr.
Name
No.
Analog input display unit
241
switchover
C16
Terminal 1 bias command
(919)
(torque/magnetic flux)
C17
Terminal 1 bias
(919) (torque/magnetic flux)
C18 Terminal 1 gain command
(torque/magnetic flux)
(920)
C19 Terminal 1 gain
(torque/magnetic flux)
(920)
C38
Terminal 4 bias command
(932)
(torque/magnetic flux)
C39
Terminal 4 bias
(932) (torque/magnetic flux)
C40
Terminal 4 gain command
(933) (torque/magnetic flux)
C41
Terminal 4 gain
(933)
(torque/magnetic flux)
The parameter number in parentheses is the one for use with the parameter unit (FR-PU04
or FR-PU07).
The above parameter allow its setting to be changed during operation in any operation mode
even if "0" (initial value) is set in Pr. 77 "Parameter write selection".
Change functions of analog input terminal
In the initial setting status, terminal 1 and terminal 4 used for analog input are respectively set
to speed setting auxiliary (speed limit auxiliary) and speed command (speed limit). To use an
analog input terminal as torque command, torque limit input or magnetic flux command input,
set Pr. 868 "Terminal 1 function assignment" and Pr. 858 "Terminal 4 function assignment" to
change functions. (Refer to section 6.20.1).
FR-A700 EC
Frequency/torque setting by analog input (terminals 1, 2 and 4)
Initial Setting
Description
Value Range
0 Displayed in % Select the unit of
0
Displayed in
1
V/mA
Set the torque (magnetic flux) on
0 % 0–400%
the bias side of terminal 1 input.
Set the converted % of the bias
0% 0–300% side voltage (current) of terminal1
input.
Set the torque (magnetic flux) of
150% 0–400% the terminal 1 input gain
(maximum).
Set the converted % of the gain
100% 0–300%
side voltage of terminal 1 input.
Set the torque (magnetic flux) on
0% 0–400%
the bias side of terminal 4 input.
Set the converted % of the bias
20% 0–300% side current (voltage) of terminal
4 input.
Set the torque (magnetic flux) of
150% 0–400% the terminal 4 input gain
(maximum).
Set the converted % of the gain
100% 0–300% side current (voltage) of terminal
4 input.
Parameters referred to
20 Acceleration/
deceleration
analog input
reference
display.
frequency
73 Analog input
selection
267 Terminal 4 input
selection
79 Operation mode
selection
858 Terminal 4 func-
tion assignment
868 Terminal 1 func-
tion assignment
Sensorless Sensorless Sensorless Vector Vector Vector
Refer to
Section
6.11.1
6.20.2
6.20.2
6.22.1
6.20.1
6.20.1
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