Hitachi SJ7002 Series Instruction Manual page 202

Forward/Reverse
Drive Stop
71=[FOT]
Opt. Code
and
72=[ROT]
Symbol
Valid for
[1] to [8]
Inputs
Required
Settings
Default
Requires
config.
terminal
Speed/Position
Control Select
Opt. Code
[SPD]
Symbol
Valid for
[1] to [8]
Inputs
Required
A044=05,
Settings
Default Requires
config.
terminal
Clearwater Tech - Phone: 800.894.0412 - Fax: 208.368.0415 - Web: www.clrwtr.com - Email: info@clrwtr.com
High-speed 2 Zero Return:
1. Motor accelerates for specified
acceleration time to high zero-
return speed
2. Motor runs at high zero-return
speed
3. Motor starts deceleration when
[ORL] signal turns ON
4. Motor runs in reverse direction at
low-speed zero-return speed
5. Motor starts deceleration to stop
when [ORL] signal turns OFF
6. Motor accelerates in forward
direction to low-speed zero return level
7. Inverter stops motor and sets position value to zero when next [Z] signal pulse occurs
The forward/reverse drive stop function prevents the motor from moving a load outside a
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
generate these signals.
If the [FOT] turns ON during forward rotation (or [ROT] turns ON during reverse rotation), the
inverter limits the motor torque to 10% in the current direction of travel.
Forward drive stop
none
Reverse drive stop
Turn ON the [SPD] terminal input to perform speed control while in absolute position control
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
While the [SPD] terminal is OFF, the current position count remains at zero. If the [SPD]
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
inverter stops the motor at the current position. Otherwise, rotation continues until motor
rotation arrives at the target position.
P012
Speed/position switching [SPD]
Output
frequency
0
[ORG]
[ORL]
[ORL]
Inverter
[ORG]
Rev
Output
frequency
Speed control
0
SJ700 Inverter
2
P071 High zero-return level
2
3
1
6
5
P070 Low-speed zero-
return level
Output to
motor
Load Fwd
Start of position counting
Position control
Target position
4–41
Origin
7
Position
4
t
t