Omron OMNUC G5 R88M-K series User Manual page 236

6-2 Forward and Reverse Drive Prohibition Functions
Drive Prohibition Input Selection (Pn504)
Set the operation of the Forward Drive Prohibition Input (POT) and the Reverse Drive Prohibition Input
(NOT). 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.
Prohibition
Input Selection
6
*1.For details, refer to explanation for Stop Selection for Drive Prohibition Input (Pn505).
Stop Selection for Drive Prohibition Input (Pn505)
Set the deceleration and stop methods upon a forward or reverse drive prohibition is input.
Pn504 set
value
*1.While the Drive Prohibition Input Selection (Pn504) is set to 2, a Drive prohibit input error (Alarm
No.38.0) occurs as soon as either the Forward or Reverse Drive Prohibition Input is on. The
subsequent operation conforms not to the set value but to the setting on the Stop Selection for Alarm
Detection (Pn510). It is the same when any other errors occur. The operation by the Stop Selection for
Alarm Detection (Pn510) has the priority.
*2.The term "During deceleration" means the distance till the motor decreases its speed to 30 r/min or less
from the normal operation. Once it decelerates to 30 r/min or lower speed, the operation conforms to
the description for "post-stopping", regardless of the actual motor speed.
*3.The "Emergency Stop" means that the Servomotor stops immediately by control while the Servo-ON
state is kept. The torque limit at this time is controlled by the Emergency Stop Torque (Pn511) set
value.
6-7
Drive
(Pn504)
Forward drive prohibition input and reverse drive prohibition input enabled.
The operation when a signal is input is as follows.
Forward drive prohibition input shorted: Forward limit switch not operating and status normal.
Forward drive prohibition input open: Forward direction prohibited and reverse direction permitted.
Reverse drive prohibition input shorted: Reverse limit switch not operating and status normal.
0
Reverse drive prohibition input open: Reverse direction prohibited and forward direction permitted.
The Servomotor decelerates and stops according to the sequence set in Stop Selection
for Drive Prohibition Input (Pn505).
If the forward and the reverse prohibition inputs are both open, a drive prohibition input
error 1 (Alarm No.38.0) occurs because it is taken that Servo Drive is in error condition.
1 Forward and reverse drive prohibition input disabled.
Forward and reverse drive prohibition input enabled.
2 If either the forward or the reverse prohibition input is open, a drive prohibition input error
1 (Alarm No.38.0) occurs.
Pn505
*1
set value
Deceleration method
0 Dynamic brake
1 Free-run
0
2 Emergency stop
OMNUC G5-Series AC Servo Drives Users Manual (Built-in MECHATROLINK-II communications type)
Explanation
*1
*2
Decelerating
Error
counter
Torque command = 0 for
Clear
drive prohibition direction
Torque command = 0 for
Clear
drive prohibition direction
Torque command and
*3
Held Torque limit are as
specified.
After stopping
Operation after stop
Held
Held
Cleared after
deceleration
completes,
then held.
Error
counter