Hitachi SJ700-2 instruction manual Operation in absolute position control mode

Chapter 4 Explanation of Functions

Multistage	speed/position	C169	0. to 200.	X10ms
determination time
Position setting monitor		d029	-1073741823 to + 1073741823
Position feedback monitor		d030	-1073741823 to + 1073741823
			54	SON: Servo-on
			66	CP1: Position setting selection 1
			67	CP2: Position setting selection 1
			68	CP3: Position setting selection 1
		C001-C008	69	ORL: Zero-return limit signal
			70	ORG: Zero-return start signal
			71	FOT: Forward drive stop
			72	ROT: Reverse drive stop
			73	SPD: Switching between speed
				and position controls
			45	ORT: Teaching
Reset mode selection		C102	03	Internal data is not initialized by a
				reset.

4.3.13 Operation in absolute position control mode

Operation Output frequency

Speed setting

ON

POK signal

If the position value specified by the position setting is small, the inverter decelerates the motor for positioning before its speed reaches

Home search completion range setting (P017)

	Position
ON
		Home search completion delay
		time setting (P018)

-In absolute position control mode, the inverter runs the motor until the machine reaches the target position according to the following settings, and then sets the machine into the position servo-lock state:

<1> Position setting

<2> Speed setting (frequency setting) <3> Acceleration and deceleration time

(The servo-lock state is held until the operation command is turned off.)

-In absolute position control mode, the frequency and acceleration/deceleration settings selected at absolute position control are applied.

-If the position value specified by the position setting is small, the inverter may decelerate the motor for positioning before its speed reaches the speed setting.

-In absolute position control mode, the rotating-direction setting (FW or RV) of the operation command is ignored. The operation command simply functions as the signal to run or stop the motor. The motor runs in the forward direction when the value of "target position - current position" is positive, or in the reverse direction when the value is negative.

-If zero-return operation (described below) is not performed, the motor position detected at power-on is assumed as the origin (position data = 0).

-When the operation command is turned on with 0 specified as the position setting, positioning is completed without running the motor.

-Specify "03" (to only reset a trip) for reset mode selection (C102).

*If a value other than "03" is specified for reset mode selection (C102), the current position counter is cleared when the inverter reset terminal (reset key) is turned on. Be sure to specify "03" for reset mode selection (C102) if you intend to use the value of the current position counter for operation after recovering the inverter from tripping by turning on the reset terminal (reset key).

- If the PCLR function is assigned to a terminal, turning on the PCLR terminal clears the current position counter.

(Note that the internal position deviation counter is also cleared at the same time.)

- In absolute position control mode, the ATR terminal is ineffective. (Torque control is disabled.)

- In absolute position control mode, the STAT terminal is ineffective. (Pulse train position control is disabled.)

- In absolute position control, the home search function is disabled.

(Note that the ORT terminal is used for the teaching function described below.)

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