8 Manual Control
8.3 Mechanical Zero Return Operation
86
FX3U-1PG User's Manual
4. Count start point
Sets the count start point of the zero-point signal.
When BFM#3 b13/BFM#37 b13 = 0: DOG forward end (After detecting the DOG forward end, zero-point
signal count starts.)
When BFM#3 b13/BFM#37 b13 = 1: DOG backward end (After detecting the DOG forward end and passing
the backward end, zero-point signal count starts.)
Point
• When the DOG forward end
- Set the number of zero-point signals such that the deceleration completes before the stop position.
• When the DOG backward end
- Set the DOG length such that the deceleration completes before passing the DOG.
5. Zero return completion
Turns on when the zero return is completed and after the zero-point address is written to the current address.
Turns off when the power is turned off or when K0 is written to the status information. It does not turn off when
the zero return operation is started.
6. Positioning completion flag
The positioning completion flag turns off when the DOG type mechanical zero return operation starts.
The positioning completion flag turns on when the zero return operation is completed.
7. Speed change during the zero return operation
When changing the zero return speed (high speed) during the zero return operation, use the operation speed
change function. However, zero return speed (creep) cannot be changed.
→ For details of the operation speed change function, refer to Section 6.6.
Setting items of the DOG type mechanical zero return operation
BFM No.
Setting items
Positioning
parameter
Extension
positioning
parameter
#0 #34, #33 Pulse rate
#2, #1 #36, #35 Feed rate
#3 b1, b0 #37 b1, b0
Operation parameter
System of units
#3 b5, b4 #37 b5, b4 Position data multiplier
#3 b8 #37 b8 Pulse output format
#3 b9 #37 b9 Rotation direction
#3 b10 #37 b10 Zero return direction
#3 b11 #37 b11 Limit deceleration mode
#3 b12 #37 b12 DOG input polarity
#3 b13 #37 b13 Count start point
#3 b14 #37 b14 STOP input polarity
#3 b15 #37 b15 STOP input mode
#5, #4 #39, #38 Maximum speed
#6 #41, #40 Bias speed
#10, #9 #45, #44 Zero return speed (high speed)
#11 #47, #46 Zero return speed (creep)
#12 #48 Number of zero-point signal for zero return
#14, #13 #50, #49 Zero-point address
#15 - Acceleration/deceleration time
- #51 Acceleration time
- #52 Deceleration time
#25 b6 Operation command
DOG type mechanical zero return
operation start
#28 b2 Status information Zero return completion
#56, #55 Operation speed change value
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