Hitachi SJ700-4000HFU2

Chapter 4 Explanation of Functions
4-109
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
(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.
<2> High-speed zero-return
<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.
<3> High-speed zero-return 2
<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.
<7> The inverter performs positioning at the
first Z pulse position after the ORL signal is
turned on.
ORG terminal
ORL terminal
ON
ON
(1)
(2)
(3)
Low-speed zero-return speed (P070)
Output frequency
Position
Origin
(1)
(2)
(3)
(4)
(5)
High-speed zero-return speed
(P071)
O
R
G
ORG terminal
ORL terminal
ON
ON
Low-speed zero-return speed (P070)
Output frequency
Position
Origin
(1)
(2)
(3)
(4)
(5)
(6)
(7)
ORG terminal
ORL terminal
ON
ON
Low-speed zero-return speed
(P070)
Output frequency
Position
Origin
high-speed zero-return speed
(P071)
Z pulse