IAI PCON-CB series User Manual

4. Operation
4.3 Pulse Train Control Mode
4-108
ME0342-4B
[6] Home Return (HOME, HEND)
PIO signal
Input
Output
HOME
HEND
The HOME signal is intended for home return.
When the HOME signal is turned ON, the command will be processed at the leading edge
(ON edge) of the signal and the actuator will perform home return operation.
Once the home return is completed, the HEND (home return completion) signal will turn ON.
Set the home (enter “0”) in the current value register of the host controller (PLC) using the
current value preset function, etc., when the HOME signal turns ON.
Caution
● The HOME signal is given priority over any pulse train command. Even when the
actuator is moving with a pulse train command, it will start home return once the HOME
signal is turned ON.
● The HOME signal is processed only at the leading edge (ON edge) of the signal.
● If the SON signal is turned OFF or an alarm is detected during home return, the home
return operation will stop. If the servo is turned OFF, the home return command will be
cancelled even when the HOME signal remains ON. To perform home return again,
therefore, turn the HOME signal OFF and then turn it ON again.
● The actuator can be operated without using this function. If this function is not used,
however, management of position data will solely be dependent on the host controller
(monitoring soft stroke limit is effective in the home return complete status).
Therefore, take the necessary measures to prevent an over-stroke, such as not sending
pulse commands with travel distances exceeding the effective stroke or providing
external limit switches for stroke end detection, etc., to forcibly stop the actuator.
● For PIO pattern 6, servo-off, switching operation mode setting switch from MANU to
AUTO or deviation counter clearing causes HEND to be turned OFF. Perform home
return again.
[Home Return Operation of Slider Type/Rod Type Actuator]
Mechanical end
Home
1)
2)
4.3 Pulse Train Control Mode
ME0342-4B 4-109
1) With the HOME signal being ON, the actuator moves toward the mechanical end at the
home return speed.
The moving speed is 20mm/s for most actuators but less than 20mm/s for some actuators.
2) The actuator is turned at the mechanical end and stopped at the home position. The moving
distance is the value set by Parameter No.22 “Home return offset level”.
Caution
● In the home reverse specification, the actuator moves in the reverse direction.
● Make sure to refer to [6.1.2 [16]] when a change to Parameter No.22
“Home return offset level” is required.
[Home Return Operation of Rotary Actuator]
(1) 330° Rotation Specification
1) When home return is commanded, the rotary part rotates in the CCW (counterclockwise)
direction as seen from the load side.
The speed is 20deg/s.
2) Detects mechanical stopper.
3) It travels in reverse.
4) Moves from the position of 3), for the amount set in Parameter No. 22 “Homing Offset” and
stops.
5) The position stopped in 4), should be the home position.
Caution
● In the home reverse specification, the actuator moves in the reverse direction.
● Make sure to refer to [6.1.2 [16]] when a change to Parameter No.22
“Home return offset level” is required.
Operation range (330 degrees)
Home
Offset travel distance
Rotary axis
1)
2)
3)
5)
4)
Mechanical stopper

IAI PCON-CB series Specifications

General

Brand	IAI
Model	PCON-CB series
Category	Controller
Language	English