6 -170 Stall Prevention during DecelerationIf connecting a braking resistor to discharge regenerative energy, be sure to set Stall prevention selection dur-ing decel (L3-04) to 0 (Disabled). AutotuningAlways perform autotuning with the motor before operating using vector control. Be sure to disconnect themotor from the load before conducting autotuning. Conducting autotuning while the motor is connected to anelevating machine system is dangerous because it automatically runs the motor for approximately one minute. Braking Resistor Overheating ProtectionWhen using a braking resistor other than the Braking Resistor Unit, provide a sequence with a thermal over-load relay or similar means to turn off the power input to the Inverter when it detects resistor overheating. Seethe Connection Diagram on page 2-3 for this sequence circuit. Momentary Power Loss RestartDo not use the momentary power loss restart and fault restart functions in applications for elevating machines.Make sure that L2-01=0 and L5-01=0. If these functions are used, the motor coasts to a stop with the brakecontact open when a momentary power loss or fault occurs during operation, possibly resulting in serious acci-dents. Torque LimitThe torque limit values (L7-01 to L7-04) are the motor's rated torque. When there is a possibility of insuffi-cient torque at start-up or other time, increase the Inverter capacity and set the torque limit value to between200% and 300% (factory setting is 200%).IMPORTANTIf Stall prevention selection during decel (L3-04) is set to , the motor may not stop within the speci-fied decelerating time.Stall prevention selection during accel (L3-01) and Stall prevention selection during running (L3-05) should beset to their initial values 1 (Enabled) to enable these functions.IMPORTANT1. When the motor cannot be disconnected from the load, perform stationary autotuning 1 (T1-01 = 1). Stationary autotuning will apply current to the motor in its stoppedcondition and automatically measure the motor data. In the initial running period after stationary autotuning1 (T1-01 = 1) (20% speed min., fixed speed for 1 s min.), the motor data measured by autotuning will auto-matically be corrected.2. To improve low-speed torque characteristics using V/f control, conduct stationary autotuning for line to lineresistance only (T1-01 = 2).3. When conducting autotuning on wound motor or other special types of motors, obtain a test report for themotor in advance and confirm that the E2 motor constants after autotuning do not vary greatly from thoseof the test report.1, 2, or 3or stationary autotuning 2 (T1-01 = 4)
