Mitsubishi Electric FR-A700 Series, Техническое руководство, Страница: 269 / 550

303
2
P
ARAM
ETE
R
PARAMETER
(6) Torque command by 16 bit digital input
[ Pr. 804 = 4, Pr. 304, 305, 447, 448 ]
Torque command by 12 bit digital input is given when
[
Pr. 304
= 4] and 16 bit digital input is given when [
Pr.
304
= 14] using the FR-A7AX (plug-in option). When
[
Pr. 804
= 4] and a value other than 4 or 14 is set in
[
Pr. 304
], torque command value = 0.
The digital torque command is input only by binary
input. The input signal uses the last 15 (11) bits as
torque command and the most significant bit as sign.
Set the torque command value when the input signal
is "0" in [
Pr. 447 ] and the torque command value
when the input signal is 7FFF
H
(7FF
H
) in [ Pr. 448 ].
The input signal is used as the torque command
value when [
Pr. 448 = 9999].
(7) Torque characteristic in the constant
power range [ Pr. 803 ].
Due to the motor characteristics, torque is reduced at
or above the base frequency. Set "1" in [
Pr. 803
Constant power range torque characteristic selection ]
when you want to keep the torque to be constant
even at or above the base frequency.
Bit15 Bit0
0 to 7FFF
H
or 0 to 190
H
(400)
Sign bit
0 : positive 1 : negative
When 16bit is selected
[ Pr. 448 ]
[ Pr. 447 ]
0
7FFF
H
(7FF
H
)
7FFF
H
(7FF
H
)
-150%
150%
Most significant bit = 0 Most significant bit = 1
Torque command value
Initial value
Digital
input signal
400%
0
7FFF
H
(7FF
H
)
7FFF
H
(7FF
H
)
190
H
(400)
190
H
(400)
-400%
Most significant bit = 0 Most significant bit = 1
Torque command value
Digital
input signal
Speed
Base speed
Torque
[ Pr. 803 = 1]:
constant torque
command
[
Pr. 803
= 0]:
constant power
command
(torque reduction)
Constant power range
Constant torque range