IAI America SCON-C - Manual (Page 225)

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Appendix
5. Troubleshooting
5.1 Action to Be Taken upon Occurrence of Problem
Upon occurrence of a problem, take an appropriate action according to the procedure below in order to ensure
speedy recovery and prevent recurrence of the problem.
a. Check the status indicator LEDs.
SV (green) ------- The servo is ON.
ALM (orange) --- An alarm is present or the motor drive power is cut off.
EMG (red) ------- An emergency stop is actuated.
b. Check for error in the host controller.
c. Check the voltage of the main power supply (control power, motor power).
d. Check the voltage of the 24-VDC power supply for input/output signals as well as the 24-VDC power supply
for brake (if the actuator is equipped with a brake).
e. Check for alarm.
Confirm the details of error on the PC or teaching pendant.
f. Check the cables for connection error, disconnection or pinching.
Before performing a continuity check, turn off the power (to prevent a runaway actuator) and disconnect the
cables (to prevent accidental power connection due to a sneak current path).
g. Check the I/O signals.
h. Check the noise elimination measures (grounding, installation of surge killer, etc.).
i. Review the events leading to the occurrence of problem, as well as the operating condition at the time of
occurrence.
j. Check the serial numbers of the controller and actuator.
k. Analyze the cause.
l. Take
action.
Please check items a through j before contacting IAI.
(Note 2) * The ALM output is a negative-logic signal.
After the power is turned on, this signal remains ON while the controller is normal. It remains OFF
while the power is cut off.
It cannot be used as a contact-b interlock when the power is cut off.