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Torque control operation
(1) I/O signals
The following table indicates the operations of the signals.
(2) Operation example (Pr. 804=0)
Torque control is enabled if the actual speed is less than the speed restriction value.
When the actual speed reaches or exceeds the speed restriction value, speed restriction operation starts, torque
control is stopped, and speed control (proportional control) starts.
The following shows the operations in response to the analog input command from the No. 3 terminal.
1) When STF is turned on, the speed restriction value is increased according to the time set in Pr. 7.
2) Torque control operation is performed when the actual speed is less than the speed restriction value.
3) When the STF start signal is turned off, the speed restriction value is decreased according to the time set in Pr. 8.
4) For torque control, the actual speed becomes constant when the torque command and load torque are bal-
anced.
5) The motor torque developing direction is determined by the combination of the torque command input polarity
and start signal as indicated in the following table.
Signal Terminal Name Remarks
Start signal
External operation STF, STR signal
Start and stop are the same as under speed
control. A stop is made when the STF and
STR signals are both on.
PU operation
Forward or reverse rotation from
PU04V or DU04
-1
Torque command As set in the torque command right selection parameter. Input torque command.
Speed restriction As set in the speed restriction selection parameter.
Display SL and output OL signal during speed
restriction.
Torque Command Polarity
Torque Developing Direction (Mode)
STF signal ON STR signal ON
Positive torque command
Forward rotation direction (forward rotation
driving/reverse rotation regeneration)
Reverse rotation direction (forward rotation
regeneration/reverse rotation driving)
Negative torque command
Reverse rotation direction (forward rotation
regeneration/reverse rotation driving)
Forward rotation direction (forward rotation
driving/reverse rotation regeneration)
REMARKS
When speed restriction operation starts, speed control is exercised to enable internal torque restriction (Pr. 22 "torque restric-
tion level) (factory setting). Speed control may not be returned to torque control in this case. Torque restriction be set to exter-
nal torque restriction (terminals No. 3, No. 1 and No. 6 (option FR-V5AX).
(Refer to Pr. 803 "constant output region torque characteristic selection" (page 33).)
STF
(Forward rotation
command)
Pr. 7
RH
(
Speed restriction)
Speed restriction value
Torque control operation
Speed restriction
operation
(Speed control)
Torque
control
operation
Pr. 8
Speed restriction
operation
Speed restriction
operation