Zero-Return Function - Hitachi SJ700-2 Instruction Manual

4.3.16 Zero-return function (ORG, ORL)
- One of three types of zero-return operations can be selected by zero-return mode selection (P068).
When a zero-return operation ends, the current position counter is cleared (to 0).
- Use zero-return direction selection (P069) to select the direction of zero-return operation.
- If zero-return operation is not performed, position control is performed based on the assumption that the
motor position detected at power-on is the origin.
<1> Low-speed zero-return
ORG terminal
ORL terminal
Output frequency
(1)
<2> High-speed zero-return
ORG terminal
O
ORL terminal
Output frequency
(1)
<3> High-speed zero-return 2
ORG terminal
ORL terminal
Output frequency
(1)
Z pulse
<7> The inverter performs positioning at the first Z pulse position after the ORL signal is turned on.
ON
ON
(2)
Low-speed zero-return speed
(P070)
(3)
Origin
ON
ON
(2)
High-speed zero-return
speed (P071)
(3)
Origin
(5) (4)
Low-speed zero-return speed
(P070)
ON
ON
(2)
(3)
Low-speed zero-return speed
(6)
Origin
(5) (4)
high-speed zero-return speed
Chapter 4 Explanation of Functions
Position
Position
(P070)
(7)
Position
(P071)
4 - 112
(1) The inverter accelerates the motor for
the specified acceleration time to the
low-speed zero-return speed.
(2) The inverter runs the motor at the
low-speed zero-return speed.
(3) The inverter performs positioning
when the ORL signal is input.
<1> The inverter accelerates the motor
for the specified acceleration time to
the high-speed zero-return speed.
<2> The inverter runs the motor at the
high-speed zero-return speed.
<3> The inverter starts deceleration
when the ORL signal is turned on.
<4> The inverter runs the motor in the
reverse direction at the low-speed
zero-return speed.
<5> The inverter performs positioning
when the ORL signal is turned off.
<1> The inverter accelerates the
motor for the specified acceleration
time to the high-speed zero-return
speed.
<2> The inverter runs the motor at the
high-speed zero-return speed.
<3> The inverter starts deceleration
when the ORL signal is turned on.
<4> The inverter runs the motor in the
reverse direction at the low-speed
zero-return speed.
<5> The inverter starts deceleration
when the ORL signal is turned off.
<6> The inverter runs the motor in the
forward direction at the low-speed
zero-return speed.