Protection Functions; Motor Over Road Protection−Level Adjust / Motor Types; Setting Of Current Stall; Inverter Trip Holding - Toshiba TOSVERT VF-P7 Instruction Manual

6.25 Protection functions

6.25.1 Motor over road protection−level adjust / motor types
 ：Motor over road protection level #1
 ：Overload reduction start-up frequency
＊Refer to 5.13 for details.

6.25.2 Setting of current stall

 ：Stall prevention level
・Do not set the stall prevention level() at a extremely small value.
If the stall prevention level() was set at a value that is near the motor's no
load current or less, stall prevention function would work and output frequency would
Mandatory
rise. In ordinary usage, do not set the stall prevention level at 30% or less.
・Function
If the output current exceeds that set with , the stall protective function is a
ctivated to reduce the output frequency.
[Parameter setting]
Title

[Display during the alarm ]
When  is displayed (when the output current is on the point of exceeding ), the ou
tput frequency displayed changes and a "" is displayed on the left side of the frequency.
Example of display
Note) In V/f constant control mode, the torque limits #1, #2, #3 and #4 can be used as a stall prevention.
You can make various settings by combining these functions with the V/f1, 2, 3 and 4 functions.

6.25.3 Inverter trip holding

 ：Selection of inverter trip holding
・Function
The function is to hold inverter's trip records. If this function is active, trip records
are retained and can be displayed even after the inverter is reset.
[Parameter setting]
Title
Selection of inverter trip holding

★The last 4 trip records can be held and displayed in status monitor mode.
★Trip data (current, voltage, etc. at the time of a trip) can be displayed in status monit
or mode when the inverter trips, but is cleared if the power is turned off.
Inverter trip
Function
Stall prevention level
Function
Panel (terminal) reset
Power source reset
Warning
Adjustment range
∼ [%], : Disabled

Adjustment range
: Cleared if power is turned off
: Hold even if power is turned off
Reset holding FL
Turn on power again
Fault display
FL not active
If the cause of tripping or that of another failure
is not yet removed.
F-56
Default setting

Default setting

Ready for
normal operation
Trip again
Fault display
FL active