IAI America ERC2 - Manual (Page 82)

5. Explanation of Operating Functions
63
Speed
Target position
Positioning band (Maximum push amount)
Push & hold operation was
determined complete here.
Travel
(Note) If the actuator is pushed back to the target position, an alarm will generate.
(2) The work part is missed during push & hold operation
If the actuator did not contact the work part after moving the specified positioning band (= the motor current does
not reach the current-limiting value during push & hold operation), the position complete signal will not be output.
However, the applicable completed position number will still be output.
At that time, the PSFL bit in the device status register (DSS1) will turn “1.”
Therefore, program the host PLC to perform a timeout check based on a sufficient timeout period.
(3) The work part moves after completion of push & hold operation
[1] The work part moves in the push direction
If the work part moves in the push direction after completion of push & hold operation, the actuator will chase
the work part within the positioning band.
If the current drops below the current-limiting value set during push & hold operation, the position complete
signal will turn OFF. The signal will turn ON when the current rises to or above the current-limiting value
again.
[2] The work part moves in the opposite direction
(The actuator is pushed back by a strong reactive force of the work part)
If the actuator is pushed back after the push & hold operation has completed because the push force of the
actuator is smaller than the reactive force of the work part, the actuator will be pushed back all the way until
its push force balances out with the reactive force of the work part.
The position complete signal remains ON.
Speed
Travel
Target position
Positioning band (Maximum push amount)
The position complete signal does not turn
ON if the actuator did not contact the load.
Speed
Travel
Target position
Positioning band (Maximum push amount)
Push & hold operation was
determined complete here.
If the load shifts in the push
direction, the actuator chases the
load within the positioning band.