Hitachi SJ7002 Series Instruction Manual page 203

High-speed 2 Zero Return:
1. Motor accelerates for specified
2. Motor runs at high zero-return
3. Motor starts deceleration when
4. Motor runs in reverse direction at
5. Motor starts deceleration to stop
6. Motor accelerates in forward
7. Inverter stops motor and sets position value to zero when next [Z] signal pulse occurs
Forward/Reverse
The forward/reverse drive stop function prevents the motor from moving a load outside a
Drive Stop desired position range. The end of travel in each direction must cause the appropriate input
signal, [FOT] or [ROT], to turn ON. Typically a limit switch or proximity switch is used to
71=[FOT] generate these signals.
Opt. Code
and
72=[ROT]
If the [FOT] turns ON during forward rotation (or [ROT] turns ON during reverse rotation), the
Symbol
inverter limits the motor torque to 10% in the current direction of travel.
Valid for
[1] to [8]
Inputs
Required
none
Settings
Default
Requires
config.
terminal
Speed/Position
Turn ON the [SPD] terminal input to perform speed control while in absolute position control
Control Select mode. The direction of rotation depends on the operation command (FWD or REV). When
switching from speed control to position control, be sure to verify the sign of the value set in
the operation command.
73
Opt. Code
While the [SPD] terminal is OFF, the current position count remains at zero. If the [SPD]
[SPD]
Symbol
terminal is turned OFF during motor operation, the control mode switches to position control
and pulse counting begins, starting from zero. If the target position value is also zero, the
Valid for
[1] to [8]
Inputs
inverter stops the motor at the current position. Otherwise, rotation continues until motor
rotation arrives at the target position.
Required A044=05,
P012
Settings
Default Requires
config.
terminal
acceleration time to high zero-
return speed
speed
[ORL] signal turns ON
low-speed zero-return speed
when [ORL] signal turns OFF
direction to low-speed zero return level
Forward drive stop
Reverse drive stop
Output
frequency
Speed/position switching [SPD]
P071 High zero-return level
Output
frequency
1
0
[ORG]
[ORL]
[ORL] Output to
motor
Inverter
[ORG]
Rev
Position control
Speed control
0
Target position
SJ700 Inverter
2
2
3
Origin
6 7
Position
5
4
P070 Low-speed zero-
return level
Load Fwd
Start of position counting
4–41
t
t