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Bit 03, Coasting:
Bit 03 = ’0’: The adjustable frequency drive immediately "lets go" of the motor, (the output transistors are "shut off") and it coasts to a standstill. Bit 03
= ’1’: The adjustable frequency drive starts the motor if the other starting conditions are met.
NOTE!
Make a selection in par. 8-50
Coasting Select
to define how Bit 03 gates with the corresponding function on a digital input.
Bit 04, Quick stop:
Bit 04 = ’0’: Makes the motor speed ramp down to stop (set in par. 3-81
Quick Stop Ramp Time
.
Bit 05, Hold output frequency
Bit 05 = ’0’: The present output frequency (in Hz) freezes. Change the frozen output frequency only by means of the digital inputs (par. 5-10
Terminal
18 Digital Input
to par. 5-15
Terminal 33 Digital Input
) programmed to
Speed up
and
Slow-down
.
NOTE!
If freeze output is active, the adjustable frequency drive can only be stopped by the following:
•
Bit 03 Coasting stop
•
Bit 02 DC braking
•
Digital input (par. 5-10
Terminal 18 Digital Input
to par. 5-15
Terminal 33 Digital Input
) programmed to
DC braking
,
Coasting
stop
, or
Reset
and
coasting stop
.
Bit 06, Ramp stop/start:
Bit 06 = ’0’: Causes a stop and makes the motor speed ramp down to stop via the selected ramp down parameter. Bit 06 = ’1’: Permits the adjustable
frequency drive to start the motor, if the other starting conditions are met.
NOTE!
Make a selection in par. 8-53
Start Select
to define how Bit 06 Ramp stop/start gates with the corresponding function on a digital input.
Bit 07, Reset: Bit 07 = ’0’: No reset. Bit 07 = ’1’: Resets a trip. Reset is activated on the leading edge of the signal, i.e., when changing from logic ’0’ to
logic ’1’.
Bit 08, Jog:
Bit 08 = ’1’: The output frequency is determined by par. 3-19
Jog Speed [RPM]
.
Bit 09, Selection of ramp 1/2:
Bit 09 = "0": Ramp 1 is active (par. 3-41
Ramp 1 Ramp-up Time
to par. 3-42
Ramp 1 Ramp-down Time
). Bit 09 = "1": Ramp 2 (par. 3-51
Ramp 2 Ramp-
up Time
to par. 3-52
Ramp 2 Ramp-down Time
) is active.
Bit 10, Data not valid/Data valid:
Tell the adjustable frequency drive whether to use or ignore the control word. Bit 10 = ’0’: The control word is ignored. Bit 10 = ’1’: The control word is
used. This function is relevant because the message always contains the control word, regardless of the message type. Thus, you can turn off the control
word if you do not want to use it when updating or reading parameters.
11 RS-485 Installation and Set-up
FC 300 Design Guide
11-20
MG.33.BC.22 - VLT
®
is a registered Danfoss trademark
11