Dog Type Mechanical Zero Return Operation - Mitsubishi Electric MELSEC-F Series User Manual

FX -1PG User's Manual
3U
8.3.2

DOG type mechanical zero return operation

The zero return starts by the DOG type mechanical zero return operation start command. When the DOG
search function is used, the DOG type mechanical zero return becomes possible from any position.
1. Operation
1) When the DOG type mechanical zero return operation start command of the operation command is
turned from off to on, movement in the zero return direction starts at zero return speed (high speed). (The
positioning completion flag turns off.)
2) When the DOG input turns on, deceleration to the zero return speed (creep) starts.
3) When the count start point is passed, the zero-point signal count starts.
4) When the count, which is set to the zero return zero-point signal number, is reached, the operation stops.
(It outputs the CLR signal.)
5) After the zero-return completion, the set value of the zero-point address is written to the current address.
6) The positioning completion flag and the zero return completion turn on.
DOG type mechanical
zero return operation start
(BFM#25 b6)
DOG
Zero return completion
(BFM#28 b2)
READY
(BFM#28 b0)
Positioning
completion flag
(BFM#28 b8)
Current address
(BFM#27, #26)
2. Zero return direction
Sets the zero return direction.
When BFM#3 b10/BFM#37 b10 = 0: The operation starts in the current address decreasing direction.
When BFM#3 b10/BFM#37 b10 = 1: The operation starts in the current address increasing direction.
3. DOG input polarity
The polarity of the DOG input is set.
When BFM#3 b12/BFM#37 b12 = 0: Normally-open (Operates when the DOG input is on)
When BFM#3 b12/BFM#37 b12 = 1: Normally-close (Operates when the DOG input is off)
Speed
Maximum speed
Zero return
speed
(high speed)
Bias speed
Acceleration/
deceleration time
(Acceleration time)
Zero-point
signal (PG0)
ON
OFF
(Does not change)
ON
ON
Current address
8.3 Mechanical Zero Return Operation
Zero return speed (creep)
Acceleration/
deceleration time
(Deceleration time)
DOG
ON
OFF
OFF
OFF
Zero-point address
8 Manual Control
Time
ON
ON
ON
setting value
85
1
2
3
4
5
6
7
8
9
10