LIST OF ALARM DISPLAYS
— D-2 —
Alarm Display
Alarm
Display
on Digital
Operator
Alarm
Output
Alarm Name
Meaning
Remarks
A.02
OFF
Parameter
breakdown
Checksum
results of parameters are abnormal.
A.04
OFF
Parameter setting
error
The parameter setting is outside the allowable setting range.
A.10
OFF
Overcurrent
An overcurrent flowed through the power transistor.
A.31
OFF
Position error pulse
overflow
Position error pulse has exceeded the value set in parameter
Cn-1E (overflow).
For the
speed/
torque
control
(only with
the zero-
clamp
function),
and for the
position
control
A.51
OFF
Overspeed
Motor speed has exceeded 4950 min
−
1
.
A.70
OFF
Overload
Rated torque was exceeded during continuous operation.
A.80
OFF
Encoder error
The number of encoder feedback pulses is abnormal.
A.b1
OFF
Reference input
read error
Servopack CPU failed to detect reference input.
For speed/
torque
control
A.C1
OFF
Servo overrun
detected
The Servomotor (encoder) ran out of control.
A.C2
OFF
Encoder output
phase error
Phase-A, -B and -C output by the encoder are abnormal.
A.C3
OFF
Encoder phase-A,
-B disconnection
Wiring in encoder phase A or B is disconnected.
A.C4
OFF
Encoder phase-C
disconnection
Wiring in encoder phase C is disconnected.
CPF00
Unde-
fined
Digital Operator
transmission error
1
Digital Operator fails to communicate with Servopack even five
seconds after power is turned ON.
These
alarms are
not stored
i
l
CPF01
Unde-
fined
Digital Operator
transmission error
2
Transmission error has occurred five consecutive times.
in alarm
traceback
memory.
A.99
ON
Not an error
Normal operation status
OFF:
Output transistor is OFF (alarm state)
ON:
Output transistor is ON
TERMS
Checksum
An automatic check function for a set of data such as parameters. It stores the sum of pa-
rameter 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.
D
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