Mitsubishi Electric FR-A800 Series Instruction Manual page 249

• To set individually for each quadrant, use Pr.812 Torque limit level (regeneration), Pr.813 Torque limit level (3rd
quadrant), Pr.814 Torque limit level (4th quadrant). When "9999" is set, Pr.22 setting is regarded as torque limit level
in all the quadrants.
Reverse
regeneration
Reverse
rotation
(Pr.814)
(Pr.813)
Reverse
driving
 Torque limit level using analog input (terminals 1, 4) (Pr.810 = "1", Pr.858,
Pr.868)
• The torque is limited with the analog input of terminal 1 or terminal 4. (External torque limit)
• 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
∗
rotation
∗
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)
248
5. PARAMETERS
5.3 Speed control under Real sensorless vector control, vector control, PM sensorless vector control
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Torque limit
+
Forward
driving
quad1 Forward
quad4
(Pr.22) rotation
Speed
quad3 quad2
(Pr.812)
Forward
regeneration
-
Rated speed
Torque limit
Forward
driving
quad4 quad1
Forward
∗
(Pr. 814) (Pr. 22)
rotation
Speed
quad3 quad2 ∗
(Pr. 813) (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
search engine
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
510.)
Gain
C38(Pr.932)
Torque limit
quad4
quad1
Forward rotation
quad3
quad2
-
Rated speed
When Pr. 858=4, Pr. 868=2
400
150
Bias
Initial
value
0 20
0 4
Torque setting signal
C39(Pr.932) C41(Pr.933)
Calibration example of terminal 4
Forward
driving
Terminal 4 input or
internal torque limit
whichever is smaller
Terminal 4 input or
internal torque limit
whichever is smaller
Forward
regeneration
Gain
C40(Pr.933)
100%
20mA