IAI America ACON-CY - Manual (Page 87)

75
5. Operation Using I/O Signals
„ Automatic Servo-off Mode
The servo automatically turns off after elapse of a specified time following the completion of positioning. (Since
no holding current is required, power consumption decreases.)
When the PLC issues the next move command, the servo will turn on again and the actuator will start moving.
* Since the servo turns off temporarily, slight position deviation may occur.
Do not use this mode at a standby position where such position deviation may be detrimental.
In solenoid valve mode 1, the positioning complete signals (PE0, PE1, PE2) turn OFF.
However, you can set the applicable parameter to keep these signals ON taking the situation where allowing
the positioning complete signals to turn OFF will cause problems depending on the sequence circuit of the
PLC into consideration.
Setting of Parameter No. 39
(Positioning complete signal output
mode)
Positioning complete signal (PE0, PE1, PE2) state
0 [PEND] When the servo is off, the positioning complete signal turns OFF
unconditionally.
Even when the next move command is issued and the servo turns
on again, the signal will remain OFF because the actuator has
already started moving to the next target position.
1 [INP] Even when the servo is off, the positioning complete signal turns
ON if the current position is close enough to the target position, or
specifically inside the range corresponding to the value set in the
“Positioning band” field of the position table. The signal turns OFF if
the current position is outside this range.
(Note) The factory setting is “0” [PEND].
Warning: If the next move command is an incremental move command (via constant pitch feed), never
use automatic servo-off.
The current position may deviate slightly as the servo turns on.
Caution: In push-motion operation, automatic servo-off is invalid if push-motion is normally completed. It
becomes valid if the actuator misses the load and completed. Do not use the automatic servo-off
mode during push-motion operation, as a rule.
Move command
Servo status
Actuator movement
Servo on
Automatic servo-off mode
(The green LED blinks.)
Delay time after completion of positioning until
the servo turns off (sec)
This delay time is set by a parameter.
Target position