№
SR-ZSV00039
－
59
－
Motor Business Unit, Appliances Company, Panasonic Corporation
7
－
2
Details of Protective Functions
Protective
function
Main
Sub
Name
Cause
Action
11
0
Control power
supply
undervoltage
protection
The PN voltage at the converter of the control power has
reduced to the specified value or less.
①
The supply voltage is too low. An instantaneous
power failure has occurred.
②
The power supply capacity is too small: the supply
voltage has reduced due to rush current when the main
power was turned on.
③
The servo drive has failed (circuit failure).
Measure the line voltage of L1C-L2C at the connector and
terminal block.
①
Increase the supply voltage capacity. Change the power
supply.
②
Increase the power supply capacity.
③
Replace with a new servo drive.
12
0
Over-voltage
protection
The supply voltage has exceeded the allowable input voltage
range. → The PN voltage at the converter has increased to
the specified value or more. The supply voltage is too
high. A sudden voltage increase due to a phase advance
capacitor and/or UPS (uninterruptible power supply system).
①
The regenerative resistor has disconnected wires.
②
The external regenerative resistor is inappropriate, not
absorbing regenerative energy.
③
The servo drive has failed (circuit failure).
Measure the line voltage of the connectors (L1, L2, and L3).
Enter the correct voltage. Remove the phase advance
capacitors.
①
By using a tester, measure the resistance of the resistor
externally attached between the terminals B1-B2 of the servo
drive. If ∞, there is disconnected wiring.
②
Change the regenerative resistance and wattage to the
specified values.
③
Replace with a new servo drive.
13
0
Main power
supply
undervoltage
protection
(between P to N)
When Pr5.08 “LV trip selection at main power OFF” is set
to 1, instantaneous power failure between L1 and L3
occurred for a longer time than specified in Pr5.09
“Detection time of main power off”, or the P-N voltage of
the main power converter decreased below the defined value
at servo-on.
①
The supply voltage is too low. An instantaneous
power failure has occurred.
②
An instantaneous power failure has occurred.
③
The power supply capacity is too small: the supply
voltage has reduced due to rush current when the main
power was turned on.
④
Open phase: The servo drive specified with a 3-phase
input was operated with a single phase power supply.
⑤
The servo drive has failed (circuit failure).
Measure the line voltage of connectors (L1, L2, and L3).
①
Increase the supply voltage capacity. Change the power
supply. Remove the cause for the electromagnetic
contactor to have failed, and turn on the power again.
②
Check the setting of Pr5.09 “Detection time of main power
off”.
Provide the correct setting for each phase of the power
supply.
③
Increase the power supply capacity. Refer to “List of
peripheral devices applicable to the servo drive” for the
capacity of the power supply.
④
Make the correct connection for each phase of the power
supply (L1, L2, and L3). Use L1 and L3 for single phase
100 V and single phase 200 V.
⑤
Replace with a new servo drive.
0
Over-current
protection
14
1
IPM error
protection
Current flowing in the converter has exceeded the specified
value.
①
The servo drive has failed (such as component failure in
circuit and IGBT)
②
Short circuit of the motor wires U, V, and W
③
Ground fault of the motor wires
④
Burnout of the motor
⑤
Contact failure of the motor wires
⑥
The dynamic brake relay has adhered because the servo
control has been turned on and off frequently.
⑦
The motor is not suitable for the servo drive.
⑧
Timing of the pulse input is either the same as or earlier
than that of the servo turning on.
①
Turn on the servo control with the motor wires
disconnected. If the failure occurs immediately, replace
the servo drive with a new (operating) one.
②
Check for whiskers of the connector lead wires to make
sure the motor wire connections U, V, and W are not short
circuited. Make the correct connection of the motor wires.
③
Check the insulation resistance between the motor wires U,
V, and W and the motor ground wires. If the insulation is
insufficient, replace the motor.
④
Check the resistance between the motor wires for balance.
If the balance is poor, replace the motor.
⑤
Check for any lost connector pin at the motor connections
U, V, and W. Fix any loose or lost pins properly.
⑥
Change the servo drive. Stop starting and stopping the
operation by turning the servo control on and off.
⑦
Check the name plates of the motor and servo drive for their
part numbers (for the capacity). Replace the motor to fit
the servo drive.
⑧
Wait for 100 ms at the minimum after the servo control is
turned on before entering any pulse.
(Continued)
