CHAPTER 2 WIRING
2-66
Description of I/O Signals
2
Alarm detection (normally open contact): Sequence output signal (Reference value 16)
Alarm detection (normally closed contact): Sequence output signal (Reference value 76)
Normally open contact: Signal is turned on (switch: closed) if servo amplifier detects an alarm.
Normally closed contact: Signal is turned on (switch: open) if servo amplifier detects an alarm.
Function
These signals are turned on if the servo amplifier detects an alarm, and the state is retained on the
servo amplifier side. After the cause of the alarm is removed, the signal is turned off (to be ready to
operation) upon a rising edge of the alarm reset [RST] signal.
Alarm can be checked by having the host controller recognizes the alarm detection.
It can be also checked when the servo-on [S-ON] is ON and ready for servo-on [RDY] is OFF.
Precautions for using a normally closed contact for alarm detection
The signal will be off for up to 1.5 seconds after the power is turned on. Check the signal status
waiting for 1.5 seconds or more after the power is turned on.
Parameter setting
To assign alarm detection (normally open contact) to a sequence output terminal, specify the
corresponding value ("16") to the output terminal function setting system parameter.
For alarm detection (normally closed contact), specify ("76").
Relevant description
The nature of the detected alarm can be output to the sequence output terminal in a code.
Alarm code 4 [ALM4] (36)
Alarm code 3 [ALM3] (35)
Alarm code 2 [ALM2] (34)
Alarm code 1 [ALM1] (33)
Alarm code 0 [ALM0] (32)
Power
OFF ON
Alarm detection: NC
contact
OFF
1.5 sec.
ON
Alarm detection
Reset [ RST]
OFF
OFF ON
ON OFF
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