Checking the inverter operating status by the start signal input to the inverter and by the Inverter running signal output from the inverter ... (c) The Inverter running (RUN) signal is output when the inverter is running. Check if the RUN signal is output while a start signal 1 (the STF/STR signal for forward/reverse rotation command) is input to the inverter. Even after the start signal is turned OFF, the RUN signal is kept output until the inverter makes the motor decelerate and stop. For the logic check, configure a sequence considering the inverter's deceleration time.
2 Power supply 3 STF Output frequency RH 5 5 6 RY Checking the motor operating status by the start signal input to the inverter and by the Output current detection signal output from the inverter ... (d) RUN 7 The Output current detection (Y12) signal is output when the inverter operates and current flows into the motor. Check if the Y12 signal is output while a start signal (the STF/STR signal for forward/reverse rotation command) is input to the inverter. The Y12 signal is initially set to be output at 150% rated inverter current. Adjust the level to around 20% using no load 8 current of the motor as reference with Pr.150 Output current detection level .
makes the motor decelerate and stop. For the logic check, configure a sequence considering the inverter's deceleration time. Like the Inverter running (RUN) signal, even after the start signal is turned OFF, the Y12 signal is kept output until the inverter 9 Backup method which does not use the inverter Even if the interlock is provided by the inverter status signal, enough failsafe is not ensured depending on the failure status of 10 the inverter itself. For example, if an inverter CPU fails in a system interlocked with the inverter's fault, start, and RUN signals, the Fault signal will not be output and the RUN signal will be kept ON because the inverter CPU is down.
Provide a speed detector to detect the motor speed and current detector to detect the motor current and consider the backup system such as performing a check as below according to the level of importance of the system. Start signal and actual operation check inverter and detected speed of the speed detector or detected current of the current detector. Note that the current is flowing Check the motor running and motor current while the start signal is input to the inverter by comparing the start signal to the through the motor while the motor coasts to stop, even after the inverter's start signal is turned OFF.
For the logic check, configure a sequence considering the inverter's deceleration time. In addition, it is recommended to check the three-phase current when using the current detector. 63 3. PRECAUTIONS FOR USE OF THE INVERTER 3.7 Failsafe system which uses the inverter Pr.1 freq ON OFF ON OFF ON ON ON 3 Starting uency DC injecti operation on bra point DC in brake Time OFF r.1 req 3 Starting uency Reset processing ON N Reset processing ON OFF ON cti on on po