Danfoss FC 300 Profibus Manual page 36

FC 300 Profibus
Bit 03, Coasting
Bit 03 = "0" causes the frequency converter to immediately "let go" of the motor (the output transistors are
"shut off"), so that it coasts to a standstill.
Bit 03 = "1" enables the frequency converter to start the motor if the other starting conditions have been
fulfilled.
NB!:
In par. 8-50 Coasting select a selection is made to define how Bit 03 gates with the corresponding
function on a digital input.
Bit 04, Quick stop
Bit 04 = "0" causes a stop, in which the motor speed is ramped down to stop via par. 3-81 Quick stop
ramp time.
Bit 05, Hold output frequency
Bit 05 = "0" causes the present output frequency (in Hz) to freeze. The frozen output frequency can then be
changed only by means of the digital inputs (par. 5-10 to 5-15) programmed to Speed up and Speed down.
NB!:
If Freeze output is active, the frequency converter can only be stopped by the following:
•
Bit 03 Coasting stop
•
Bit 02 DC braking
•
Digital input (par. 5-10 to 5-15) programmed to DC braking, Coasting stop or Reset and coasting stop.
Bit 06, Ramp stop/start:
Bit 06 = "0" causes a stop, in which the motor speed is ramped down to stop via the selected ramp down
parameter.
Bit 06 = "1" permits the frequency converter to start the motor, if the other starting conditions have been
fulfilled.
NB!:
In par. 8-53 Start select a selection is made to define how Bit 06 Ramp stop/start gates with the
corresponding function on a digital input.
Bit 07, Reset
Bit 07 = "0" does not cause a reset. Bit 07 = "1" causes the reset of a trip. Reset is activated on the signal's
leading edge, i.e. when changing from logic "0" to logic "1".
Bit 08, Jog
Bit 08 = "1" causes the output frequency to be determined by par. 3-19 Jog speed.
Bit 09, Selection of ramp 1/2
Bit 09 = "0" means that ramp 1 is active (parameters 3-40 to 3-47). Bit 09 = "1" means that ramp 2
(par. 3-50 to 3-57) is active.
Bit 10, Data not valid/Data valid
Is used to tell the frequency converter whether the control word is to be used or ignored. Bit 10 = "0"
causes the control word to be ignored, Bit 10 = "1" causes the control word to be used. This function
is relevant, because the control word is always contained in the telegram, regardless of which type of
telegram is used, i.e. it is possible to turn off the control word if you do not wish to use it in connection
with updating or reading parameters.
Bit 11, Relay 01
Bit 11 = "0" Relay not activated. Bit 11 = "1" Relay 01 activated, provided Control word bit 11 has been
chosen in par. 5-40 Function relay.
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How to Control the FC 300
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