IAI America SCON-C - Manual (Page 88)

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 Jog (JOG+, JOG-)
These signals function in two modes, which are toggled according to the input (ON/OFF) of the jog/inching
switching signal (JISL).
[1] Jog mode: The jog/inching switching signal (JISL) is OFF
The actuator jogs while a jog signal is ON, and will decelerate to a stop when the signal is turned OFF.
The JOG+ signal causes the actuator to jog forward, while the JOG- signal causes the actuator to jog
backward.
If the JOG+ and JOG- signals turn ON simultaneously, the actuator will decelerate to a stop.
The travel speed corresponds to the value set in parameter No. 26, “PIO jog speed.”
[2] Inching mode: Jog/inching switching signal (JISL) is ON
Once a jog signal turns ON, the actuator will travel for the specified inching distance.
The JOG+ signal causes the actuator to inch forward, while the JOG- signal causes the actuator to inch
backward.
The distance traveled as a result of a single inching movement (= inching distance) corresponds to the
value set in parameter No. 36, “PIO inching distance.”
These signals are accepted regardless of whether the actuator is stopped or moving. The total number of
times the JOG+ and JOG- signals have been input determines the final stopping position.
The travel speed corresponds to the value set in parameter No. 26, “PIO jog speed.”
If a jog signal is turned ON during normal operation, the actuator will continue with its normal operation (the jog
signal will be ignored).
(Note) Until home return is completed, the software stroke limits are ineffective and therefore the actuator may
crash into a mechanical end. Exercise due caution.
 Current-position write (PWRT)
This signal is enabled when the aforementioned MODES output signal is ON.
If this signal remains ON for 20 msec or more, the controller will read a position number consisting of the binary
code specified by PC1 to PC32 that are currently detected, and write the current position data as a target
position in the position data table under the corresponding position number.
If data other than the target position (speed, acceleration/deceleration, positioning band, etc.) are yet to be
defined, the default parameter settings will be written.
When the writing completes successfully, the WEND output signal will turn ON.
Configure the system in such a way that the PLC will turn OFF the PWRT signal when WEND turns ON. The
controller will turn OFF WEND once the PWRT signal turns OFF. If the PWRT signal is turned OFF before the
WEND signal turns ON, the WEND signal will not turn ON.
(Note) An alarm will generate if a write command is issued when home return has not been performed yet or
while the actuator is moving.
 Required condition when the servo is on:
This signal is enabled when both the JOG+ and JOG- input signals are OFF, HEND output signal is
ON, and MOVE output signal is OFF.
 Required condition when the servo is off:
This signal is enabled as long as the HEND output signal is ON. However, whether the actuator is
being moved by hand or stopped cannot be distinguished. Therefore, this signal should be input after
physically checking the actuator operation to confirm that the actuator is stopped.