Auto-reset (Times and reset interval)
H04 and H05 specify the auto-reset function that makes the inverter automatically attempt to reset the tripped state
and restart without issuing an alarm output (for any alarm) even if any protective function subject to reset is
activated and the inverter enters the forced-to-stop state (tripped state). If the protective function is activated in
excess of the times specified by H04, the inverter will issue an alarm output (for any alarm) and not attempt to
auto-reset the tripped state.
Listed below are the protective functions subject to auto-reset.
Protective function LED monitor displays: Protective function LED monitor displays:
Overcurrent protection
0c1
,
0c2
,
0c3
Motor overheat
0h4
Overvoltage protection
0u1
,
0u2
,
0u3
Braking resistor overheat
dbh
Heat sink overheat
0h1
Motor overload
0l1
,
0l2
Inverter internal overheat
0h3
Inverter overload
0lu
■ Number of reset times (H04)
H04 specifies the number of reset times for the inverter to automatically attempt to escape the tripped state. When
H04 = 0, the auto-reset function will not be activated.
• Data setting range: 0 (Disable), 1 to 20 (times)
due to a trip fault, depending on the cause of the tripping. Design the machinery so that human body and
peripheral equipment safety is ensured even when the auto-resetting succeeds.
Otherwise an accident could occur.
■ Reset interval (H05)
• Data setting range: 0.5 to 20.0 (s)
H05 specifies the reset interval time between the time when the inverter enters the tripped state and the time when
it issues the reset command to attempt to auto-reset the state. Refer to “Operation timing scheme” below.
<Operation timing scheme>
• In the figure below, normal operation restarts in the 4-th retry.
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