Fuji Electric ALPHA5 Smart, User Manual

Page: 116 / 636

CHAPTER 2 WIRING
2-68
Description of I/O Signals
2
OFF
Limiter detection: Sequence output signal (Reference value 19)
With this signal, the limiter function availability can be checked.
This function becomes enabled after homing or position preset.
 Function
The limiter function is enabled in the position control mode, and not enabled in the interrupt
positioning operation.
The limiter function always stops travels at the detection position even if a position command with
the value exceeding the parameter of PA2_28 (positive limiter detecting position) or PA2_29
(negative limiter detecting position) is given, never allowing the travel to exceed the limiter
detection position.
The deceleration time in stopping follows the parameters and the positioning data settings.
(However, travels are stopped in rapid deceleration during pulse operation.)
After stopped at the limiter detection position, the limiter detection signal is output in the same
condition as the In-position signal output.
To return from the limiter detection condition, shift the current position by giving a command in the
opposite direction from the detection direction. The limiter detection signal will turn off, enabling
travels in both directions.
The above positioning data assumes uniform incremental positioning data.
 Parameter setting
To assign limiter detection to a sequence output terminal, enter the corresponding value (“19”) to
the output terminal function setting parameter.
 Relevant description
The limiter function is a useful function. It allows the motor to travel at a uniform interval to the
preset parameter position, which eliminates the need to calculate the frequency of starting or
remaining distance to go to the set position.
OFF
Limiter detection
Time
Start positioning
OFF ON
In-position (level)
Rotation speed