558 Appendix A - ACS380 in crane applications
When you activate a forward command,
• when the motor potentiometer reference (
22.230
) is less than the crane motor
potentiometer minimum speed (
22.224
), the crane accelerates to the crane motor
potentiometer minimum speed (
22.224
).
• when the motor potentiometer reference (
22.230
) is higher than the crane motor
potentiometer minimum speed (
22.224
) and the crane travels in forward direction
the speed reference remains at the last speed before the forward command.
• when the motor potentiometer reference (
22.230
) is higher than the crane motor
potentiometer minimum speed (
22.224
) and the crane travels in reverse direction,
the crane decelerates to zero speed, changes direction and then accelerates to
the crane motor potentiometer minimum speed (
22.224
).
Notes:
1. When you release the acceleration command (
22.223
), the motor potentiometer
reference (
22.230
) remains in the last reached level. To accelerate further, you
need to activate the acceleration command (
22.223
) again.
2. When you release the forward command, the motor potentiometer reference
(
22.230
) decreases to zero as per the deceleration time (
23.202
).
Reverse direction
You can increase the motor potentiometer reference (
22.230
) to the reverse direction
with any of these two methods:
• Activating the reverse command: The motor potentiometer reference (
22.230
)
increases to the crane motor potentiometer minimum speed (
22.224
).
or
• Activating the crane motor potentiometer acceleration command (
22.223
)
together with the reverse command: This increases the motor potentiometer
reference (
22.230
).
When you activate a reverse command,
• when the motor potentiometer reference (
22.230
) is less than the crane motor
potentiometer minimum speed (
22.224
), the crane accelerates to the crane motor
potentiometer minimum speed (
22.224
).
• when the motor potentiometer reference (
22.230
) is higher than the crane motor
potentiometer minimum speed (
22.224
) and the crane travels in reverse direction
the speed reference remains at the last speed before the reverse command.
• when the motor potentiometer reference (
22.230
) is higher than the crane motor
potentiometer minimum speed (
22.224
) and the crane travels in the forward
direction, the crane decelerates to zero speed, changes direction and then
accelerates to the crane motor potentiometer minimum speed (
22.224
).
ACS380 FW.book Page 558 Friday, May 4, 2018 4:18 PM
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