IAI America RCM-GW-CC - Manual (Page 89)

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(8) Pause (STP, MOVE)
This is a function to perform pause during movement of axis.
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Function
Axis movement can be stopped and restarted by the STP (pause) signal. Axis movement stops while
the STP signal is ON.
A relationship between the STP signal and MOVE (on-moving) signal is as follows.
(9) Servo on (SON, SV)
This is a signal to put the motor into an operable status.
When the servo is turned on, the LED (green) for SV on the front of the controller is lit. In ERC2, the LED
on the upper part of the motor unit is lit in green.
The SV (operation preparation completion) signal synchronizes with this LED indication.
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Function
Servo ON/OFF for the controller is enabled by the SON (servo on) signal.
While the SON signal is ON, the controller is in the servo on status and can be operated.
A relationship between the SON signal and SV signal is as follows.
Depends on acceleration and deceleration.