Mitsubishi Electric FR-A700 Technical Manual page 288

(2) Change the torque at maximum analog
input [C18(Pr. 920), C36(Pr. 929), C40(Pr.
933)]
Set [C18 (Pr. 920)], [C36 (Pr. 929)], [C40 (Pr. 933)] when
changing only torque setting (gain) of the maximum
analog input voltage (current).
(3) Analog input bias/gain calibration
[C16 to C19(Pr. 919, 920), C34 to C37(Pr.
928, 929), C38 to C41(Pr. 932, 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 5VDC, 0 to 10VDC or 4 to
20mADC, and the torque.
Set the bias torque of the terminal 1 input using [C16
(Pr. 919)] . (It is initial value 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)
400
150
(-5V)
Bias
(-10V)
[C16 (Pr.919)]
-100%
Calibration example of terminal 1
Set the bias torque of the terminal 4 input using [C38
(Pr. 932)] . (It is initial value to the torque at 4mA)
Set the torque in [C40 (Pr. 933)] for 20mA of the
torque command current (4 to 20mA).
400
150
Bias
[C38 (Pr.932)]
0 20
0 4
[C39 (Pr.932)]
Calibration example of terminal 4
When the voltage/current input specifications were
changed using [Pr. 73 and 267], be sure to make
calibration.
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
Torque setting signal
[C41 (Pr.933)]
Set [C34 (Pr. 928)] for the bias torque of terminal 6
(FR-A7AZ). (Initial value is 0)
Set [C36 (Pr. 929)] for the torque of torque command
at voltage 10V (Initial value).
Bias
[C34 (Pr.928)]
-10V
Calibration example of terminal 6 (torque command)
Bias
[C34 (Pr.928)]
-10V
Torque limit value
is clamped at 0%
Calibration example of terminal 6 ((regenerative) torque limit)
(4) Analog input display unit switchover [Pr. 241]
You can change the analog input display unit (%/V/
mA) for analog input bias/gain calibration.
Depending on the terminal input specification set in
[Pr. 73] and [Pr. 267], the display units of [C17 (Pr. 919)]
[C19(Pr. 920)], [C39(Pr. 932)] and [C41(Pr. 933)] change
as shown below.
Analog
Command
(Terminal 1,4)
[Pr. 73, Pr. 267]
Displayed in 0 to
0 to 5V input 100%
(displayed in 0.1%)
Displayed in 0 to
0 to 10V input 100%
(displayed in 0.1%)
Displayed in 0 to
0 to 20mA input 100%
(displayed in 0.1%)
322
PARAMETER
Torque(%)
Initial value
150%
Gain
[C36 (Pr. 929)]
Torque setting
signal
10V
[C35
0
[C37 (Pr.929)]
(Pr. 928)]
150%
Torque(%)
Initial value
150%
Gain
[C36 (Pr. 929)]
Torque setting
signal
10V
[C35
0
[C37 (Pr.929)]
(Pr. 928)]
[Pr. 241 = 0]
[Pr. 241 = 1]
(Initial Value)
Displayed in 0 to 5V
(0.01V increments)
Displayed in 0 to 10V
(0.01V increments)
Displayed in 0 to 20mA
(0.01mA increments)