Appendix A - ACS380 in crane applications 543
When parameter
30.203
Deadband forward
is set to 2%, it means that there is a
deadband area of 30 rpm (2% of par.
12.20
AI1 scaled at AI1 max
= 1500 rpm) in the
forward direction. Inside this deadband area, the resulting speed reference is zero.
Actual signal
09.06
Crane speed reference
shows the final speed reference used,
and when the speed reference is outside this dead-band area. In this case, actual
signal
09.06
starts to show a positive reference starting from the point where the
scaled value of analog input AI1 (
12.12
AI1 scaled value
) exceeds 30 rpm.
Settings
Parameters:
30.203
Deadband forward
,
30.204
Deadband reverse
Signals:
09.06
Crane speed reference
,
09.16
Crane frequency reference
Warnings: -
Faults: -
Start/stop interlocking
The Start/stop interlocking function of the control program lets the end-user start the
crane only when the drive is ready to operate.
The function includes the following features:
•
Joystick zero position interlocking
(page
543
)
•
Joystick reference interlocking
(page
544
)
Joystick zero position interlocking
This function supervises the zero position of the joystick while the drive is running and
a stop command is given, or if the drive trips on a fault. A falling edge of the zero
position input (
20.214
) must occur before the end-user can give a new start command
after stopping or tripping. If the drive logic does not detect a falling edge (that is, the
signal remains high) before a new start command is given, the drive generates a
warning (
D209
).
ACS380 FW.book Page 543 Friday, May 4, 2018 4:18 PM
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