8-18
8.12 Auto restart try
Group Display Parameter Name Setting Range Default Unit
Function
group 2
H26 [Number of Auto Restart try] -
0 ~ 10 0
H27 [Auto Restart time] - 0 ~ 60 1.0 sec
This parameter sets the number of times auto restart is activated in H26.
It is used to prevent the system down caused by internal protection function activated by
the causes such as noise.
H26: Auto restart will become active after the H27. H26 – [Number of Auto restart try] is
reduced by 1 when it is active. If the trip outnumbers the preset restart try, auto restart function
is deactivated. If the setting is reset via the control terminal or the STOP/RST key on the
keypad, the number of auto restart try set by user is automatically entered.
If there is no more trip occurring for 30 sec after Auto restart operation, the H26 is restored to
the preset value.
When operation is stopped due to Low voltage {Lvt} or Emergency stop {EST}, Inverter
Overheat {Oht}, and Hardware Trip {HWt}, Auto restart will be deactivated.
After the H27- [Auto Restart time], the motor starts acceleration automatically via speed search
(H22-25).
The following pattern is shown when the H26 – [Number of auto restart try] is set to 2.
Run
Command
Constant
Run
Number of Auto
restart try
2 1 2 1 0 2
Freq
Voltage
Reset
30Sec
Speed Search
operation
Trip occurred
H27
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