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Block diagram of torque limit
<Real sensorless vector control>
Speed command +
-
Selecting the torque limit input method (Pr.810)
• Use Pr.810 Torque limit input method selection to select the method to limit the output torque for speed control. The
method in the initial setting is use of the parameter settings.
Pr.810 setting
0 (initial value)
1
2
*1
For details, refer to the FR-E800 Instruction Manual (Function).
Torque limit level using analog input (terminal 1) (Pr.810 = "1", Pr.868)
• The torque is limited with the analog input of terminal 1. (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".
Torque limit
Speed control
Speed estimator
Torque limit input method
*1
Internal torque limit 1
External torque limit
*1
Internal torque limit 2
Iq current control
M
Operation
Perform the torque limit operation using the parameter (Pr.22, Pr.812
to Pr.814) settings. If changing the torque limit parameters via
communication is enabled, the torque limit input can be performed via
communication.
Torque limit using analog voltage to terminal 1 is valid.
• The setting value of Pr.805 or Pr.806 is used as the torque limit
value.
• The torque limit via communication is enabled.
CONTROL CIRCUIT INPUT SIGNAL
3
49
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