Toshiba TOSVERT VF-S11 - Page 140

E6581158
F-38
6
+ Protective operation detection relay signals (FLA, FLB, FLC terminal signals) are not sent during use of
the retry function. (Default setting)
+ To allow a signal to be sent to the protective action detection relay (FLA, B and C terminals) even during
the retry process, assign the function 36 or 37 to H.
+ A virtual cooling time is provided for overload tripping (QN,QN, QNT).
In this case, the retry function operates after the virtual cooling time and retry time.
+ In the event of tripping caused by an overvoltage (QR - QR), the retry function will not be activated
until the voltage in the DC section comes down to a normal level.
+ In the event of tripping caused by overheating (QJ), the retry function will not be activated until the tem-
perature in the inverter comes down low enough for it to restart operation.
+ Keep in mind that when H is set to  (trip retained), the retry function will not be performed, re-
gardless of the setting of H.
+ During retrying, the blinking display will alternate between TVT[ and the monitor display specified by
status monitor display mode selection parameter H.
+ The number of retries will be cleared if the inverter is not tripped for the specified period of time after a
successful retry.
"A successful retry" means that the inverter output frequency reaches the command frequency without
causing the inverter to re-trip.
6.13.4 Dynamic (regenerative) braking - For abrupt motor stop
H : Dynamic braking selection
H
: Dynamic braking resistance
H
: Dynamic braking resistor capacity
• Function
The VFS11 does not contain a braking resistor. Connect an external braking resistor in the following
cases to enable dynamic braking function:
1) when decelerating the motor abruptly or if overvoltage tripping (OP) occurs during deceleration
stop
2) when a continuous regenerative status occurs during downward movement of a lift or the
winding-out operation of a tension control machine
3) when the load fluctuates and a continuous regenerative status results even during constant
speed operation of a machine such as a press