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Sigma II User's Manual
The uses of open-collector output signals ALO1, ALO2 and ALO3 is described
below.
Output ð ALO1 CN1-37
Output ð ALO2 CN1-38
Output ð ALO3 CN1-39
Output ð *SG CN1-1
These signals output alarm codes to indicate the type of alarm detected by the servo
amplifier. Use these signals to display alarm codes at the host controller. See 9.2.3
Alarm Display Table for more on the relationship between alarm display and alarm
code output.
When a servo alarm (ALM) occurs, eliminate the cause of the alarm and set the fol-
lowing /ALM-RST input signal to high level (ON) to reset the alarm.
Input ð /ALM-RST CN1-44
The alarm reset signal is used to reset a servo alarm.
Form an external circuit so the servo amplifier turns OFF when an alarm occurs.
Alarms are reset automatically when the control power supply is turned OFF.
Alarms can also be reset using a panel or digital operator.
Note: 1.
Encoder alarms cannot always be reset by inputting the /ALM-RST signal. In that case, turn the
control power supply OFF to reset the alarm.
2.
When an alarm occurs, always eliminate the cause before resetting the alarm. See 9.2.1 Trouble-
shooting Problems with Alarm Displays for more details on troubleshooting the system when an
alarm occurs.
Alarm Code Output
Alarm Code Output
Alarm Code Output
Signal Ground for Alarm Code Output
Alarm Reset
5-70
Chapter 5: Parameter Settings and Functions
Speed/Torque Control,
Position Control
Speed/Torque Control,
Position Control
Speed/Torque Control,
Position Control
Speed/Torque Control,
Position Control
Speed/Torque Control,
Position Control
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