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Alarmlist
Alarm Alarm name
Detecting method
Cause and counter measures
AL01 Over-current (OC)
IPM of the power supply detected following
troubles.
(Model 035P or lower versions can detect 1
only.)
1
．
Over-current
2
．
Overheating
3
．
Gate power supply low
1
．
Short circuit or grounding of armature wire (U, V, or W)
2
．
Ambient temperature is higher than 55 degrees Celsius.
Above problems are likely.
If other causes are likely, contact the manufacturer.
AL02 Over voltage (OV)
Main circuit DC power supply PN voltage)
is over 400 VDC.
1
．
The motor is running with a speed greater than the max.
rotation rate.
2
．
Acceleration causes overshoot exceeding the max. rotation
rate.
3
．
JP1 or JP2 is disconnected. Or the external counter current
resistance is not connected or the connection line is
broken.
AL03 Low PN voltage (PNLV)
Main circuit DC power supply PN voltage)
dropped below 170 VDC.
1
．
Low input power voltage.
2
．
T phase is missing from input power supply. (In case of
070 to 200P)
3
．
If this alarm is issued during motor acceleration, power
supply capacity shortage is likely.
AL04 Main power supply input
trouble (ACINF)
Low main power supply (AC) input voltage. 1
．
Electrolytic capacitor is properly charged during main
power supply input.
2
．
Main power supply was disconnected during operation.
AL05 Function undefined
AL06 Resolver disconnected
(RELV)
Resolver signal voltage between R1 and R2
dropped below 0.35 VAC.
Check that the resolver cable is not broken or disconnected.
Test the voltage level between R1 and R2.
(It should be over 0.35V in the AC range.)
AL07 Power status error
(POWFAIL)
CPU cannot judge the amplifier type.
1
．
CPU’s software version is not consistent with the unit
configuration.
2
．
The amplifier is out of order.
Above problems are likely.
Please contact the manufacturer.
AL08 Servo amplifier overheating
(SOH)
The radiation fin is heated exceeding the
range of 90 to 100 degrees Celsius.
1
．
Temperature rise inside the control panel.
2
．
The cooling fan inside the amplifier is out of order.
AL09 Counter current resistance
overheating (RGOH)
Overheating of the amplifier integrated
counter current absorption resistor is de-
tected by software operation.
The frequency of acceleration or deceleration may be too high
or continuous absorption (negative load) is likely.Calculate
the counter current energy and install an exetrnal counter
current resistor.
AL10 Reverse current absorption
error (RGST)
The reverse current absorption transistor is
ON over 50ms.
1
．
When an external resistor is not used, check if JP1 and JP2
are short-circuited or not.
2
．
When an exeternal resistor is used, turn OFF the machine
and test the resistance between the terminal block PA and
JP2. The normal range is between 6 and 30 ohms. If the
value is over that range, a line break inside the resistor is
likely.Replace the resistor.
AL11 Instant thermal 2
Effective load ratio for overload protection
exceeds the setting value.
1
．
Load is too much for the motor output.
2
．
Operation cycles are too short for the motor capacity.
Motor load is too much. Lower the speed.
AL12 DSP error (DSPERR)
DSP stopped working.
The amplifier is out of order.
Please contact the manufacturer.
AL13 Resolver ABS battery low
voltage (BLV)
The battery voltage is below 3.4V.
Replace the battery.If AL24 has not been issued, the zero point
setting is still saved.
E5. Electronic Terry Motion
103
