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
control power
converter is lower than the specified
value. Or the control voltage is too
low due to an instantaneous outage
or shortage of power capacity.
12
Overvoltage The line voltage is larger than the
specified acceptable range, so that
error
the P-N voltage of the converter is
larger than the specified value, or the
l i n e v o l t a g e w a s r a i s e d b y a
c o n d e n s i v e l o a d o r U P S
(Uninterruptible Power Supply).
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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 volt-
ages (between L1, L2 and L3). Re-
move the causes. Feed a power of
correct voltage.