540 Appendix A - ACS380 in crane applications
Speed matching
The Speed matching function compares the crane speed reference continuously to
the actual motor speed
to detect any differences. The function makes sure that the
motor follows the speed reference when stopped, during acceleration or deceleration,
and when running at the constant speed. The function also makes sure that the brake
does not slip when the drive has stopped with the brake closed.
The function has two deviation levels:
• one for checking the speed deviation during a ramping state, that is, acceleration
and deceleration (
76.33
)
• one for checking the speed deviation during a constant speed (
76.32
).
The drive trips on a fault (
D105
) if the drive is running, and
• the motor is running in a steady state, and the difference between the motor
actual speed (
90.01
)
and the ramped and shaped speed reference (
24.01
)
is
greater than the steady state deviation level for longer than a delay (
76.34
)
or
• the motor is accelerating or decelerating, and the difference between the motor
actual speed (
90.01
)
and the ramped and shaped speed reference (
24.01
)
is
greater than the ramping state deviation level for longer than a delay (
76.34
).
The drive generates a warning (
D200
) if the drive stops, and
• the difference between the motor actual speed (
90.01
)
and the speed reference is
greater than the steady state deviation level for longer than a delay (
76.34
)
and
• the brake control is active and the brake is closed.
ACS380 FW.book Page 540 Friday, May 4, 2018 4:18 PM
ghv Vertriebs-GmbH
| Am Schammacher Feld 47 | 85567 Grafing | T 49 80 92 81 89 0 | [email protected] |
www.ghv.de
