Operation In Absolute Position Control Mode - Hitachi SJ700D-004L Instruction Manual

Chapter 4
Position setting monitor
Position feedback monitor
Reset mode selection

4.3.13 Operation in absolute position control mode

Operation
command
Output frequency
Speed setting
POK signal
- 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.)
-1073741823 to + 1073741823
d029
d030 -1073741823 to + 1073741823
C001-C008
C102
ON
If the position value
specified by the position
setting is small, the inverter
decelerates the motor for
positioning before its speed
reaches the speed setting.
4-107
Explanation of Functions
54 SON: Servo-on
66 CP1: Position setting selection 1
67 CP2: Position setting selection 1
68 CP3: Position setting selection 1
69 ORL: Zero-return limit signal
70 ORG: Zero-return start signal
71 FOT: Forward drive stop
72 ROT: Reverse drive stop
SPD: Switching between speed and
73
position controls
45 ORT: Teaching
Internal data is not initialized by a
03
reset.
Home search completion range setting (P017)
Position
ON
Home search completion delay time
setting (P018)