YASKAWA SERVO Manuel d'utilisateur Page 67

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5.3 Sequence I/O Signals
5-7
5
Parameter Setting and Functions
5.3.3 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 9.1.1 List of Alarms for Command Option Attachable Type SERVOPACKs.
Select whether /ALO1 to /ALO3 are used or /WARN, /BK and /S-RDY are used with the parameter below.
(3) Alarm Reset Method
If a servo alarm (ALM) occurs, first eliminate the cause of that alarm, then reset the alarm.
It is sometimes not possible to reset encoder-related alarms with the /ALM-RST signal. In such cases, shut off the control
power and then reset the alarm.
Configure an external circuit so that this alarm output turns OFF the main circuit power
supply for the SERVOPACK whenever an error occurs.
Type
Signal
Name
Connector
Pin No.
Setting Meaning
Output ALM CN1-3, 4
ON (close) Normal SERVOPACK status
OFF (open) SERVOPACK alarm status
Type Signal Name
Connector
Pin No.
Description
Output
/ALO1 CN1-1, 2 Alarm code output
/ALO2 CN1-23, 24 Alarm code output
/ALO3 CN1-25, 26 Alarm code output
Parameter Meaning When Enabled
PnB51
0
[Factory setting]
Does not output /ALO1 to /ALO3. (/WARN, /BK, and /S-RDY are
output.)
After restart
1
Outputs /ALO1 to /ALO3. (/WARN, /BK, and /S-RDY are not out-
put.)
Be sure to eliminate the cause of an alarm before resetting the alarm.
Resetting an alarm without eliminating its cause and then continuing operation may
result in damage to the product or fire.
Type Signal Name
Connector
Pin No.
Description
Input /ALM-RST CN1-7 Alarm reset
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