CKD ESSD Series Instruction Manual page 33

ｃ） Alarm and Alarm Reset
Alarm Descriptions
Alarm
１．Overload
２．Abnormal
Stroke Length
３．Temperature
Anomaly
４．System
malfunction
For actions to take against alarms, please refer to Section 10: Troubleshooting.
WARNING: If alarms 3 and 4 above are confirmed, immediately shut down the power supply and inspect the
inspect the actuator including all power supply related concerns.
１） Actuator behavior when an alarm is triggered:
As soon as an alarm is triggered, the actuator will stop at that spot (servomotor is ON).
Alarm output (b-contact connection) goes OFF, and ready-to-operate output goes OFF.
Body indicator light will also light up in red.
Refer to Sequences after Power-On Table in Section 7.1 for output and indicator light behaviors.
２） How to execute alarm reset:
Remove the causes of the alarm and input the alarm reset signal.
For alarm reset method using the teaching pendant, refer to teaching pendant instruction manual
[ETP-2 (SM-431061)].
CAUTION：
When an alarm is triggered, if the power supply is shut down without resetting the alarm, the alarm will
not be cancelled when the power is re-connected. (The alarm descriptions are stored in memory.)
After troubleshooting the alarm, always execute alarm reset.
CAUTION：
Because the movement command input signals of single type and double 3-position type of the solenoid
valve mode are level inputs, it will be activated depending on the condition of input signals after alarm
reset.
Example：
In single mode, if Input 2 (target position ① is designated) is turned OFF and an alarm is triggered
during operation, the actuator will stop at that spot. When alarm reset is executed after troubleshooting,
it will move to target position ① at the same time because Input 2 is OFF. Troubleshooting after an
alarm has been triggered is very dangerous; exercise caution such as resetting the alarm via the
teaching pendant and operating by jog movements.
In case of double 3-position type, make sure to set Input 1 and Input 2 to OFF at alarm resets.
Teaching Pendant
Display Screen
OVERLOAD
It is overloaded.
ERROR
STROKE
It cannot position at its target position.
ERROR
TEMP
Controller temperature is above the rated value.
ERROR
SYSTEM
There is controller failure.
ERROR
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Description
<SM-431049>
Reset
Possible
Possible
Possible
Impossible