Mitsubishi Electronics FR-V500 O signals, Operation example Pr =0, Signal Terminal Name Remarks

Torque control operation

(1) I/O signals

The following table indicates the operations of the signals.

Signal		Terminal Name		Remarks
	External operation		STF, STR signal	Start and stop are the same as under speed
Start signal	PU operation		Forward or reverse rotation from	control. A stop is made when the STF and
			PU04V or DU04-1	STR signals are both on.
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.

(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.

Pr. 7 Speed restriction value Pr. 8

STF (Forward rotation command)

RH (Speed restriction)

Speed restriction	Torque control operation	Speed restriction	Torque	Speed restriction
operation		operation	control	operation
		(Speed control)	operation

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.

Torque Command Polarity	Torque Developing Direction (Mode)
	STF signal ON	STR signal ON
Positive torque command	Forward rotation direction (forward rotation	Reverse rotation direction (forward rotation
	driving/reverse rotation regeneration)	regeneration/reverse rotation driving)
Negative torque command	Reverse rotation direction (forward rotation	Forward rotation direction (forward rotation
	regeneration/reverse rotation driving)	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).)

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