LIST OF ALARM DISPLAYS
412
Alarm Display
Alarm
Alarm Output
Alarm
Meaning Remarks
sp
ay
on
Alarm Code Output
ALM
ame
Digital
Operator
ALO1 AL02 AL03
A.00 OFF OFF OFF OFF Absolute
data error
Absolute data fails to be received, or
received absolute data is abnormal.
For
absolute
encoder
only
A.02 OFF OFF OFF OFF User
constant
breakdown
Checksum results of user constants are
abnormal.
A.04 OFF OFF OFF OFF User
constant
setting error
The user constant setting is outside the
allowable setting range.
A.10
ON
OFF OFF OFF Overcurrent An overcurrent flowed through the power
transistor.
A.31
ON ON
OFF OFF Position
error pulse
overflow
Position error pulse has exceeded the
value set in user constant Cn-1E
(overflow).
For
position
control
only
A.40 OFF OFF
ON
OFF Overvoltage The main circuit voltage for motor
operation has become too high.
A.51
ON
OFF
ON
OFF Overspeed Motor speed has exceeded 4950 r/min.
A.70
ON ON ON
OFF Overload Rated torque was exceeded during
continuous operation.
A.80 OFF OFF OFF OFF Absolute
encoder
error
The number of pulses per absolute
encoder revolution is abnormal.
For
absolute
encoder
only
A.81 OFF OFF OFF OFF Absolute
encoder
backup
error
All three power supplies for the absolute
encoder (+5 V, battery and internal
capacitor) have failed.
For
absolute
encoder
only
A.82 OFF OFF OFF OFF Absolute
encoder
checksum
error
The checksum results of absolute
encoder memory is abnormal.
For
absolute
encoder
only
A.83 OFF OFF OFF OFF Absolute
encoder
battery error
Battery voltage for the absolute encoder
is abnormal.
For
absolute
encoder
only
OFF: Output transistor is OFF
ON
: Output transistor is ON
TERMS
Checksum
An automatic check function for a set of data such as user constants. It stores the sum of
user constant data, recalculates the sum at specific timing, and then checks whether the
stored value matches the recalculated value. This function is a simple method of checking
whether a set of data is correct.
E
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