Fuji Electric ALPHA7, User Manual

Page: 126 / 662

CHAPTER 2 WIRING
Description of I/O Signals
2-79
2
Alarm detection (normally open contact): Sequence output signal (Reference value 16)
Alarm detection (normally closed contact): Sequence output signal (Reference value 76)
Signals are turned on (off in case of normally closed contact) if the servo amplifier detects an alarm
(activation of a protective function).
 Function
The signal is 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 contact remains turned off for about 4.5 seconds after the power is turned on.
There are alarms that cannot be reset with an RST signal.
Refer to "■ Alarm reset" in "7.2.3 Alarm Display List" for details on alarms that can be
reset with the [RST] signal.
 Parameter setting
To assign the alarm detection (normally open contact) to a sequence output terminal, specify the
corresponding value ("16") to the output terminal function setting 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 4.5 s ＯＮ
Alarm detection
Reset [RST]
ＯＦＦ
ＯＦＦ ＯＮ
ＯＮ ＯＦＦ