4-2 Function Mode •Note that an overcurrent trip may occur if the mechanical brake forces the motor to stop during Inverter output. •Allocate 11 (FRS) to the desired multi-function input. •Performs a free-run stop (FRS) while the FRS terminal is turned on. When the FRS terminal is turned off, the motor restarts after retry wait time b003 elapses. With RUN command selection A002 set to 01 (control terminal), the motor restarts only if the FW terminal is turned on, even in free running. •You can select the Inverter output mode for restart at free-run stop selection b088 (0 Hz start or frequency matching restart).
(Examples 1, 2) •The setting of this function is also applied to stop selection b091. (Example 1) 0 Hz start (Example 2) Frequency matching start FW FW 4 FRS FRS Functions Motor rotation speed 0 Free running 0 Hz start Motor rotation speed Free running 0 Frequency matching start · The Inverter starts running at 0 Hz regardless of the motor rotation speed. · The retry wait time is ignored at 0 Hz start. · If the Inverter starts running at 0 Hz with the motor rotation speed high, an overcurrent trip may occur. · After the FRS terminal is turned off, the motor frequency is matched and a frequency matching starts without stopping the motor.
If this causes an overcurrent trip, extend the retry wait time. Cooling Fan Control •You can set whether to operate the Inverter's cooling fan constantly or only during Inverter operation. This function applies to the Inverter models with a built-in cooling fan. 4-36 b003 Parameter No. Function name Data Default setting Unit b092 Cooling fan control 00: Always ON 01: ON during RUN 02: Depends on the fin temperature 01 Data Description 00 Operates constantly. 01 Operates only during RUN. The cooling fan operates for 5 minutes after power-on, and for 5 minutes after the Inverter stops. 02 Operates when the fin temperature is 50°C or higher.