Correcting a Motor Overspeed Fault (OS) on an IMPULSE Series 5 Drive
Identify the Fault: The OS fault is a critical safety-related fault that indicates the drive is not reading the correct motor speed. This fault must be corrected before operating the hoist motion and the VG+ drive.
Understand the Fault: The OS fault is based on the VG+ drive, sensing that based on encoder feedback, the motor speed is running a set value above (F01-24) the speed it is supposed to run, within a set period of time (F01-25).
Reset the Fault: To clear the fault, a reset function must occur. There are two ways to reset using the keypad. One is with the reset key, the white key that has got the label reset on it or the F1 key with on the display of the drive, the word reset over the top. Use either one of these to reset the fault using the keypad.
Identify the Causes: A true overspeed condition that may happen if for some reason there is an overload condition on a hoist or there is additional speed somehow being caused on the particular crane motion. This could be due to a loose encoder coupling or encoder noise.
Determine the Cause: Double check the encoder signal and encoder line for noise. Double check the encoder coupling to make sure it is not moving around. You can also check the fault trace in the monitor menu to see the motor speed as compared to the output frequency. A difference of greater than 5% will fault the drive.
Check the Parameters: The parameter group that controls when the overspeed fault is F01 group. Scroll through the parameters and check F01-24 overspeed detection level or F01-25 overspeed time. The fault is 105% and set to trigger instantly (0 seconds/no delay).
Access more CMCO training from our Magnetek team here - motion.cmco.co...
Full Series 5 Troubleshooting Video Playlist - motion.cmco.co...
Негізгі бет IMPULSE® •Series 5 AC Variable Frequency Drives: Correcting a Motor Overspeed Fault OS Part 3 | CMCO
No video
Пікірлер