Limiter Detection: Sequence Output Signal (Reference Value 19) - Fuji Electric ALPHA7 User Manual

CHAPTER 2 WIRING
 Parameter setting
To assign the point detection and area detection 1 to IQ area (sequence output terminal), specify
the corresponding value ("17") to the output terminal function setting parameter. Specify ("18") for
point detection and area detection 2.
2

Limiter detection: Sequence output signal (Reference value 19)

Whether the limiter function is enabled or not is checked.
This function is valid following homing or position preset.
This signal is enabled only for LS type.
 Function
The limiter function is valid in position control mode.
The limiter function does not function during interrupt positioning.
The limiter function ensures that the motor always stops at the detection position, even if a position
command that exceeds the PA2_28: Positive limit detection position or PA2_29: Negative limiter
detection position is issued (the limiter detection position is never exceeded.) The deceleration time
when the motor stops is based on the parameter and positioning data settings (however, the motor
comes to a rapid deceleration stop if performing pulse train operation.)
After stopping at the limiter detection position, a limiter detection signal is output under the same
conditions as positioning complete signal output. To recover from the limiter detection status, issue
a command in the opposite direction to the detection direction, and shift the current position. The
limiter detection signal turns OFF, allowing the motor to move in both directions.
Rotation speed
Start positioning
In-position (level)
Limiter detection
The above positioning data assumes uniform incremental positioning data.
 Parameter setting
To assign the limiter detection to IQ area (sequence output terminal), specify the corresponding
value ("19") to the output terminal function setting parameter.
 Relevant description
The limiter function is helpful to move at a uniform interval to the preset parameter position.
There is no need to calculate the frequency of starting or remaining distance to go.
2-90
Description of I/O Signals
OFF
OFF
ON
OFF
Time