Yaskawa Sigma-5 Large Capacity Users Manual: Design and Maintenance-Rotary Motors-Analog Voltage and Pulse Train Reference - Manual (Page 199)

5 Operation
5.10.1 Servo Alarm Output Signal (ALM) and Alarm Code Output Signals (ALO1, ALO2, and ALO3)
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5.10 Other Output Signals
This section explains other output signals.
Use these signals according to the application needs, e.g., for machine protection.
5.10.1 Servo Alarm Output Signal (ALM) and Alarm Code Output Signals (ALO1,
ALO2, and ALO3)
This section describes signals that are output when the SERVOPACK detects errors and resetting methods.
(1) Servo Alarm Output Signal (ALM)
This signal is output when the SERVOPACK detects an error.
(2) Alarm Code Output Signals (ALO1, ALO2, and ALO3)
The ON/OFF combination of these signals specifies the type of alarm detected by the SERVOPACK.
Use these signals as required to display the contents of the alarm at the host controller.
For details, refer to 10.1.1 List of Alarms.
(3) Alarm Reset Method
If a servo alarm (ALM) occurs, use one of the following methods to reset the alarm after eliminating the cause
of the alarm.
The /ALM-RST signal will not always reset encoder-related alarms. If an alarm cannot be reset with /ALM-
RST, cycle the control power supply.
Configure an external circuit so that this alarm output turns OFF the main circuit power
supply to the SERVOPACK and converter whenever an error occurs.
Type
Signal
Name
Connector
Pin Number
Setting Meaning
Output ALM CN1-31, 32
ON (closed) Normal status
OFF (open) Alarm status
Type Signal Name
Connector
Pin Number
Meaning
Output
ALO1 CN1-37 Alarm code output
ALO2 CN1-38 Alarm code output
ALO3 CN1-39 Alarm code output
SG CN1-1 Signal ground for alarm code output
Be sure to eliminate the cause of the alarm before resetting it.
If the alarm is reset and operation continued without eliminating the cause of the alarm, it
may result in damage to the equipment or fire.