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5-4 Forward and Reverse Drive Prohibit
Function
This function sets the Forward Drive Prohibit Input (POT) and Reverse Drive Prohibit Input (NOT)
operation at the control I/O connector CN1 on the Servo Drive.
You can stop the Servomotor from rotating beyond the machine's operating range with the drive
prohibition inputs.
Parameters Requiring Settings
Parameter
Parameter name
No.
Drive Prohibit Input
Pn004
Selection
Input Signal
Pn044
Selection
Stop Selection for
Pn066
Drive Prohibition
Input
Operation
[Stopping method when Pn004=0 and either POT or NOT turns OFF]
Stop Selection for Drive
Prohibition Input (Pn066)
POT (NOT) turns OFF.
Drive Prohibit Input Error (alarm code 38) occurs when Pn004=0 and both Forward Drive Prohibit
and Reverse Drive Prohibit inputs turn OFF.
When Pn004=1, the inputs for both Forward Drive Prohibit and Reverse Drive Prohibit are
disabled.
Drive Prohibit Input Error (alarm code 38) occurs when Pn004=2, and either Forward Drive
Prohibit input or Reverse Drive Prohibit input turns OFF.
After stopping, a command in the direction of the drive prohibit input will cause a command
warning.
With a vertical axis, there is a risk that the load may drop when drive is prohibited by the drive
prohibit input. To prevent this, it is recommended that the deceleration method be set to use
emergency stop torque in the Drive Prohibit Input Stop Selection parameter (Pn066), and that
stopping in the servo-lock state be set (set value: 2).
5-4 Forward and Reverse Drive Prohibit
Explanation
Chooses whether to enable or disable this function when
POT/NOT turns OFF.
Sets the POT/NOT assignment. By default, CN1 pin 19 is
set to POT, and CN1 pin 20 is set to NOT.
Sets the deceleration stopping method when POT/NOT
turns OFF.
Deceleration Method
Decelerates with dynamic brake
0
1
Use free-run to decelerate
2
Use Emergency Stop Torque
(Pn06E) to decelerate.
Reference page
5-88
5-74
5-95
Stopped Status
Disables torque
in drive prohibited
direction
Servo lock status
5-10
5
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