Mitsubishi FR-A800

Speed control under Real sensorless vector control, vector control, PM sensorless vector
control
PARAMETERS
203
5
Setting the torque bias amount using contact input (Pr.840="0", Pr.841 to
Pr.843)
• Select the torque bias amount shown in the table below using the corresponding contact signal combination.
• To input the X42 signal, set "42" in any of Pr.178 to Pr.189 (input terminal function selection) to assign the function to a
terminal, and to input the X43 signal, set "43".
• When Pr.841=1025, the torque bias is 25%. When Pr.842=975, the torque bias is -25%. When Pr.843=925, the torque bias
is -75%.
NOTE
• Changing the terminal assignment using Pr.178 to Pr.189 (input terminal function selection) may affect the other
functions. Set parameters after confirming the function of each terminal.
Setting the torque bias amount using terminal 1 (Pr.840 ="1, 2", Pr.847,
Pr.848)
• Calculate the torque bias from the load input to terminal 1 as shown in the diagram below, and then apply the torque bias.
• To set the torque bias amount with a voltage input to terminal 1, set Pr.868 Terminal 1 function assignment ="6".
• The torque bias amount (Pr.847) and gain amount (Pr.848) when descending (reverse motor rotation when the Pr.840
setting is "1", forward motor rotation when the setting is "2") can be set in a range of 0 to 400%. When Pr.847 or Pr.848
="9999", the setting is the same for both descending and ascending (C16 to C19).
NOTE
• Input 0 to 10 V (torque command) to the terminal 1 that is used for the torque bias function. Any negative input voltage is
regarded as 0 V.
Torque bias
selection 1 (X42)
Torque bias
selection 2 (X43)
Torque bias amount
OFF OFF 0%
ON OFF Pr.841 -400% to +400% (Setting value: 600 to 1400%)
OFF ON Pr.842 -400% to +400% (Setting value: 600 to 1400%)
ON ON Pr.843 -400% to +400% (Setting value: 600 to 1400%)
Pr.840
Setting
When ascending When descending
1
(Forward motor rotation)
(Reverse motor rotation)
2
(Reverse motor rotation) (Forward motor rotation)
Torque command
terminal 1 gain
C18(Pr. 920)
Torque command
terminal 1 bias
C16(Pr. 919)
Voltage for
max. load
C19(Pr. 920)
Voltage for
balanced load
Pr. 846
Terminal 1
input
Bias amount
C17(Pr. 919)
Voltage for
max. load
C19(Pr. 920)
Voltage for
balanced load
Pr. 846
Bias amount
Terminal 1
input
Fall-time
torque bias
terminal 1
gain
Pr. 847
Fall-time
torque bias
terminal 1
bias
Pr. 848
C17(Pr. 919)
Torque command
terminal 1 gain
C18(Pr. 920)
Voltage for
max. load
C19(Pr. 920)
Voltage for
balanced load
Pr. 846
Bias amount
Terminal 1
input
Torque command
terminal 1 bias
C16(Pr. 919)
C17(Pr. 919)
Voltage for
max. load
C19(Pr. 920)
Voltage for
balanced load
Pr. 846
Bias amount
Terminal 1
input
Fall-time
torque bias
terminal 1
bias
Pr. 847
Fall-time
torque bias
terminal 1
gain
Pr. 848
C17(Pr. 919)