Panasonic A4P Series User Manual

165

 • In MINAS-A4P Series, a warning is given before a protection function works and you can check the ma-

chine status such as overload in advance.
When a warning has been given, a warning code below blinks slowly on the 7-segment LED at the front panel.

 • When an overload warning or over-regeneration load warning has been given, referring to the counter-

measures taken by relevant protection function.

 • When a battery warning has been given, replace the battery for absolute encoder with a new one. When

the battery has been replaced, perform Alarm Clear to the servo driver once to clear the battery alarm.

16

18

40

88

89

Overload warning

Over-regeneration 

load warning

Battery warning

Fan lock warning

External scale alarm

The load has been 85% or more of the overload protection level.

The load has been 85% or more of the over-regenerative load protection level.

Voltage of a battery for absolute encoder has been approximately 3.2 V or less.

A fan has stopped for 1s or more.

An external scale temperature has been 65flC or more or signal intensity is insufficient 

(mounting must be adjusted). This is enabled only for the full-closed control.

Voltage between P and N of the converter portion of the 
control power supply has fallen below the specified value.
1)Power supply voltage is low. Instantaneous power 

failure has occurred

2)Lack of power capacity...Power supply voltage has 

fallen down due to inrush current at the main power-on.

3)Failure of servo driver (failure of the circuit)

Measure the voltage between lines of connector (L1C 
and L2C) and terminal block (r and t).
1)Increase the power capacity. Change the power 

supply.

2)Increase the power capacity.

3)Replace the driver with a new one. 

Voltage between P and N of the converter portion of the 
control power supply has exceeded the specified value
1)Power supply voltage has exceeded the permissible 

input voltage. Voltage surge due to the phase-
advancing capacitor or UPS (Uninterruptible Power 
Supply) have occurred.

2)Disconnection of the regeneration discharge resistor 

3)External regeneration discharge resistor is not appro-

priate and could not absorb the regeneration energy.

4)Failure of servo driver (failure of the circuit) 

Measure the voltage between lines of connector (L1, 
L2 and L3). 
1)Enter correct voltage. Remove a phase-advancing 

capacitor.

2)Measure the resistance of the external resistor 

connected between terminal P and B of the driver. 
Replace the external resistor if the value is 

∞

.

3)Change to the one with specified resistance and 

wattage. 

4)Replace the driver with a new one. 

Instantaneous power failure has occurred between L1 and 
L3 for longer period than the preset time with SV.Pr6D 
(Main power-off detection time) while SV.Pr65 
(Undervoltage error response at main power-off) is set to 
1. Or the voltage between P and N of the converter 
portion of the main power supply has fallen below the 
specified value during Servo-ON.
1)Power supply voltage is low. Instantaneous power 

failure has occurred 

2)Instantaneous power failure has occurred.

3)Lack of power capacity...Power supply voltage has 

fallen down due to inrush current at the main power-
on.

4)Phase lack...3-phase input driver has been operated 

with single phase input.

5)Failure of servo driver (failure of the circuit)

Measure the voltage between lines of connector (L1, 
L2 and L3). 

1)Increase the power capacity. Change the power supply. 

Remove the causes of the shutdown of the magnetic 
contactor or the main power supply, then re-enter the power.

2)Set up the longer time to SV.Pr6D (Main power off 

detecting time). Set up each phase of the power correctly. 

3)Increase the power capacity. For the capacity, refer 

to P.32, "Driver and List of Applicable Peripheral 
Equipments" of Preparation.

4)Connect each phase of the power supply (L1, L2 and 

L3) correctly. For single phase, 100V and 200V 
driver, use L1 and L3.

5)Replace the driver with a new one.