TM 5-3895-374-24-1 Configuration, special functions, settings Special functions Functions Selection Factory setting Description DC stop Yes / No Yes DC injection braking when the output frequency becomes <1 Hz (otherwise, locking) Current and duration adjustable (p 93) Low speed freewheel No / Yes No Validation of this function causes the speed controller to lock should the frequency drop to below the low speed value Applications: tapered rotor motors Catching a spinning load No / Yes No This function avoids, in the event of a short (see recommendations mains failure (> 20 ms), a break in the motor following page) speed Function off: when   restarted,   the   output   frequency   develops from zero to the reference value Function on: when restarted, the output frequency is imme- diately equal to the reference value, the voltage develops progressively so as not to cause an overcurrent CAUTION: when operating, this function requires  a  special  control  sequence  maintaining power and control supply, maintaining the speed reference and the operating direction signal (FW or  RV)  If  one  of  these  signals  is  only  validated after  restoration  of  the  voltage,  speed  returns  to the required value according to the ramp (reset to zero) Motor brakes in order to pull into the ramp, and   there   is   a   risk   of   06F      fault   (excessive braking) Applications  machines for which loss of speed is slight during short mains failures Automatic restart No/ Yes No Activation of this function enables automatic (see recommendations restarting of the speed controller, following an on following page) excessive braking fault or a motor overload fault. In the event of locking, following excessive braking, the speed controller remains locked for 1 minute with display of code 06F  and restarts automatically if the fault has disappeared. and if the other operating conditions allow this If overvoltage occurs again, the locking for one minute and restart command sequence is repeated 4 times (that is a maximum of 5 sequences) before the speed controller locks permanently In the event of locking, following motor over- load, the speed controller remains locked for as long as the thermal state stays higher than 100 % (about 7 minutes) Restarting is possible if the other operating conditions allow this For both these faults, the safety relay (contact to terminals SA-SB) remains closed Applications: machines or installations opera- ting without supervision (page 3-241)