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6 Applied Functions
OMNUC G5-series (Pulse-train Input Type) AC Servomotors and Servo Drives User’s Manual
6-10 Forward and Reverse Drive Prohibition Functions
6
6-10-2 Parameters Requiring Settings
Install limit switches at both ends of the axis to prohibit the Servomotor from driving in the direction
specified by the switch. This can be used to prevent the workpiece from driving too far and thus prevent
damage to the machine. Set the operation to be performed upon forward and reverse drive prohibition
input.
Precautions for Correct UsePrecautions for Correct Use
Both signals are disabled (in a state in which drive prohibition does not operate) in the default
settings. If prohibiting the drive input is required, set the Drive Prohibit Input Selection (Pn504) to
either 0 or 2. The setting on the Input Signal Selection 1 to 10 (Pn400 to Pn409) can change the
logic and allocation for the respective Input terminals (CN1 pins 1 to 8, 9, 26 to 33).
Drive Prohibition Input Selection (Pn504)
Drive
Prohibition
Input
Selection
(Pn504)
Description
0 Forward and Reverse Drive Prohibition Input function enabled
The function operates as follows when a signal is input:
When Forward Drive Prohibition Input is shorted: Normal state in which the forward limit switch
does not operate
When Forward Drive Prohibition Input is open: Forward rotation prohibited and reverse rotation
permitted
When Reverse Drive Prohibition Input is shorted: Normal state in which the reverse limit switch
does not operate
When Reverse Drive Prohibition Input is open: Reverse rotation prohibited and forward rotation
permitted
The Servomotor decelerates and stops according to the sequence set in Stop Selection for
Drive Prohibition Input (Pn505). For details, refer to explanation for Stop Selection for Drive
Prohibition Input (Pn505).
If both the Forward and the Reverse Prohibition Input signals are open, Drive Prohibition Input
Error (Alarm No. 38.0) will occur because it is taken that Servo Drive is in error condition.
1 Forward and Reverse Drive Prohibition Input function disabled
2 Forward and Reverse Drive Prohibition Input function enabled
If either the Forward or Reverse Prohibition Input signal is open, Drive Prohibition Input Error
(Alarm No. 38.0) will occur.
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