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3-17
3-1 Servo Drive Specifications
OMNUC G5-Series AC Servo Drives Users Manual (Built-in MECHATROLINK-II communications type)
3
Specifications
]
Forward Drive Prohibition Input (POT) and Reverse Drive Prohibition Input (NOT)
The two signals are the inputs to prohibit forward and reverse rotation (over-travel inputs).
When one input is ON, the Servo Drive can rotate in the specified direction.
In the Drive Prohibition state, Servomotor switches to servo lock state after deceleration stop.
The maximum torque at deceleration stop is the same as the maximum servomotor torque.
In the Drive Prohibition state, the Servo Drive does not switch to an alarming state.
When the Drive Prohibition Input Selection (Pn504) is set to 1, the operation at a drive prohibit
input can be selected on the Stop Selection for Drive Prohibition Input (Pn505).
When the Drive Prohibition Input Selection (Pn504) is set to 2, the Drive Prohibition Input
Protection (E380) works at a drive prohibition input.
In factory setting, the Forward Drive Prohibition Input (POT) is allocated to Pin 7, while the
Reverse Drive Prohibition Input (NOT) is to Pin 8.
Reference
In factory setting, both inputs are set to Disabled (in a state to disable the drive prohibition).
The setting can be changed by the Drive Prohibit Input Selection (Pn504). The setting on the
Input Signal Selection 1 to 10 (Pn400 to Pn409) can change the theory and allocation for the
respective Input terminals (CN1 to 7 and 8).
Origin Proximity Input (DEC)
This is the deceleration signal at origin searches.
When the Origin Proximity Input is ON while the Servomotor travels at the origin search feed
speed, it decelerates to the origin search approach speed.
When the first origin input is entered after the Origin Proximity Input turns OFF, the Servomotor
decelerates to the origin search creep speed, and controls positions for the origin search final
travel distance.
After positioning completes, the position is the origin.
In factory setting, the Origin Proximity Input is assigned to Pin 9.
Precautions for Correct Use
The Origin Proximity Input (DEC) signals can be entered in the speed control mode and the
torque control mode. However, the inputs do not relate the operation.
External Latch Input Signals (EX1, EX2 and EX3)
These are the external input signals to latch the present value on the feedback pulse counter.
The Encoder position data is obtained at the moment when the External Latch Input is turned on.
In factory setting, the External Latch Input 1 is allocated to Pin 12, the External Latch Input 2 to
Pin 11, and the External Latch Input 3 to Pin 10.
Precautions for Correct Use
The external latch inputs are detected by signal raises. The minimal signal width must be 1 ms.
The external latch inputs can only be set to NO (normally open) contact.
The external latch inputs can be allocated to pins 10 to 12 only.
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