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ProNet Series AC Servo User's Manual
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4.11 Other Output Signals
4.11.1 Servo alarm output
The following diagram shows the right way to connect the Alarm Output.
An ex24V I/O power supply is required since there is no +24V power source available inside the servo drive.
Output → ALM+ 1CN- 7 Servo alarm output
Output → ALM- 1CN- 8 Servo alarm output uses grounding signal
ALM outputs a signal when the servo drive is detected in an abnormal state.
Normally, the external circuit consists of /ALM should be able to switch off the power of servo drive.
Signal Status Output level Comments
ALM
ON 1CN-7
：
“L” level Normal state
OFF 1CN-8
：
“H” level Alarm state
When “servo alarm(ALM)” happens, always remove alarm reasons first , and then turn the input signal "/ALM-RST" to ON
position to reset alarm status.
→ Input /ALM-RST 1CN- 39 alarm reset input
Signal Status Input level Comments
/ALM-RST
ON
1CN-39 ： “L” level
Reset servo alarm
OFF 1CN-39 ： “H” level Do not reset servo alarm
Normally, the external circuit can switch off the power supply of the servo drive when an alarm occurs. When
powered on again, the servo drive removes the alarm automatically, so the alarm reset is not required to be connected. In
addition, the alarm reset is enabled with the panel operator.
Note: When an alarm occurs, remove the alarm reason before resetting the alarms.