Protective Functions - Panasonic minas a series Operating Manual

Protective Functions

What are the Protective Functions?
The MINAS driver has various protective functions. When one of the protections is activated, the
motor trips according to the timing chart shown in "Error Handling" in Appendix, and the Servo
Alarm Output (ALM) is turned off.
Actions to be taken after trip events
• After a trip event, the LED touch panel displays an alarm code no., and no Servo-ON occurs.
• Any trip status is cleared by keeping A-CLR (Alarm Clear Input) on for at least 120 ms after A-CLR off.
•The overload protection can be cleared by A-CLR at least 10 seconds after the occurrence of the
event. If the control power connection between r and t is opened, the time limiting operation is
cleared.
• The alarms mentioned above can also be cleared with the LED touch panel. See Alarm Clear
Modes in Appendix.
• The alarms mentioned above can also be cleared by using PANATERM.
<Notes>
Protections marked with * cannot be cleared with A-CLR (Alarm Clear Input). They should be cleared
by turning the power off, removing the causes, and then turning the power on again.
Protective Functions: Causes and Corrections
Alarm
Protection
Code No.
11
Undervoltage,
The P-N voltage of the control power con-
control power
verter is lower than the specified value. Or
the control voltage is too
low due to an instantaneous outage or short-
age of power capacity.
12
Overvoltage The line voltage is larger than the specified
acceptable range, so that the P-N voltage
error
of the converter is larger than the specified
value, or the line voltage was raised by a
condensive load or UPS (Uninterruptible
Power Supply).
Cause
- 64 -
Countermeasures
Measure the P-N voltage to check whether
the voltage is correct or not. Modify the
control voltage to an
acceptable value, and/or increase the
power capacity.
Measure the terminal-to-terminal voltages
(between L1, L2 and L3). Remove the
causes. Feed a power of
correct voltage.