Preset Speed Mode; Protection Functions; Setting Of Stall Prevention Level; Inverter Trip Record Retention - Toshiba TOSVERT VF-AS1 Instruction Manual

6.32

Preset speed mode

 ~  : Preset speed operation modes
⇒ For more details, refer to Section 5.12.
6.33

Protection functions

6.33.1 Setting of stall prevention level

 : Stall prevention level
• Do not set the stall prevention level () extremely low.
If the stall prevention level parameter () is set at or below the no-load current of the motor, the stall
preventive function will be always active and increase the frequency when it judges that regenerative
Prohibited braking is taking place.
Do not set the stall prevention level parameter () below 30% under normal use conditions.
• Function
This parameter reduces the output frequency by activating a current stall prevention function against a
current exceeding the -specified level.
[Parameter setting]
6
Title

[Display during the alarm ]
During an  alarm status, (that is, when there is a current flow in excess of the stall prevention level), the output
frequency changes. At the same time, to the left of this value, "" is displayed flashing on and off.

6.33.2 Inverter trip record retention

 : Inverter trip record retention selection
• Function
If the inverter trips, this parameter will retain the corresponding trip information. Trip information that has
thus been stored into memory can be displayed, even after power has been reset.
[Parameter setting]
Title

Up to four sets of latest trip records displayed in status monitor mode can be stored into memory.
Data (current, voltage, etc.) displayed in status monitor mode when the inverter is tripped is cleared when power is
turned off.
Warning
Function
Stall prevention level
 
Example of display
Function
Inverter trip record retention selection
Adjustment range
~%, :Deactivated
Adjustment range
:Clear when power is turned off.
:Retain even after power is turned off.
F-54
E6581301
Default setting

Default setting
