# Mitsubishi Electric FR-A820-00046 (0.4K) Instruction Manual Page 239

Fr-a800 series.

• Torque limit using analog input is valid with a limit value lower than the internal torque limit (Pr.22, Pr.812 to Pr.814). (If
the torque limit using analog input exceeds the internal torque limit, the internal torque limit is valid.)
• When inputting the torque limit value from terminal 1, set Pr.868 Terminal 1 function assignment = "4". When inputting
from terminal 4, set Pr.858 Terminal 4 function assignment = "4".
• When Pr.858 = "4" and Pr.868 = "2", the torque for regenerative driving is limited with the terminal 1 analog input, and the
torque for power driving is limited with the terminal 4 analog input.
Reverse
regeneration
Reverse
(Pr. 814)
rotation
(Pr. 813)
Reverse
driving
∗ Analog input (terminal 1, 4) or internal torque control (Pr. 22 etc.) whichever is smaller
• The torque limit using analog input can be corrected with the calibration parameters C16 (Pr.919) to C19 (Pr.920), and
C38 (Pr.932) to C41 (Pr.933). (Refer to
400
150
Bias
C16(Pr.919)
NOTE
• When inputting an analog signal to the terminal 1, give a positive voltage (0 to +10 V (+5 V)).
When a negative voltage (0 to -10 V (-5 V)) is input, the torque limit value set by the analog signal becomes "0".
238
5. PARAMETERS
5.3 Speed control under Real sensorless vector control, vector control, PM sensorless vector control
Torque limit
Forward
driving
Forward
(Pr. 22)
rotation
Speed
(Pr. 812)
Forward
regeneration
-
Rated speed
page
C18(Pr.920)
Initial
value
0
100%
0
Torque setting signal
5V
0
10V
C17(Pr.919)
C19(Pr.920)
Calibration example of terminal 1
Reverse
regeneration
Terminal 4 input or
internal torque limit
whichever is smaller
Reverse rotation
Speed
Terminal 4 input or
internal torque limit
whichever is smaller
Reverse
driving
487.)
Gain
C38(Pr.932)
Torque limit
-
Rated speed
When Pr. 858=4, Pr. 868=2
400
150
Bias
Initial
value
0
20
0
4
Torque setting signal
C39(Pr.932)
Calibration example of terminal 4
Forward
driving
Terminal 4 input or
internal torque limit
whichever is smaller
Forward rotation
Terminal 4 input or
internal torque limit
whichever is smaller
Forward
regeneration
Gain
C40(Pr.933)
100%
20mA
C41(Pr.933)