Alarms Related To Synchronized Stopping - YASKAWA Sigma-7 Series Product Manual

4.3 Alarms Related to Synchronized Stopping

4.3 Alarms Related to Synchronized Stopping
If an alarm without valid position data occurs, the servo will be turned OFF for the synchronized
stopping axis and synchronized stopping will not be performed.
The alarms without valid position data are given in the following table.
Alarm
Number
A.810
A.820
A.840
A.850
A.890
A.891
A.C90
A.C91
A.C92
4-6
Alarm Name
Encoder Backup Alarm
Encoder Checksum Alarm
Encoder Data Alarm
Encoder Overspeed
Encoder Scale Error
Encoder Module Error
Encoder Communications Error
Encoder Communications Posi-
tion Data Acceleration Rate Error
Encoder Communications Timer
Error
Alarm Meaning
The power supplies to the encoder all failed and the position
data was lost.
There is an error in the checksum results for encoder mem-
ory.
There is an internal data error in the encoder.
The encoder was operating at high speed when the power
was turned ON.
A failure occurred in the linear encoder.
An error occurred in the linear encoder.
Communications between the encoder and SERVOPACK is
not possible.
An error occurred in calculating the position data of the
encoder.
An error occurred in the communications timer between the
encoder and SERVOPACK.