Danfoss VLT HVAC Drive FC 100 Series Design Manual page 156

RS-485 Installation and Set...
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.
Make a selection in 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 3-81 Quick Stop Ramp Time).
Bit 05, Hold output frequency
7 7
Bit 05 = '0': The present output frequency (in Hz) freezes.
Change the frozen output frequency only by means of the
digital inputs (5-10 Terminal 18 Digital Input to
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 (5-10 Terminal 18 Digital Input to
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.
Make a selection in 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
3-19 Jog Speed [RPM].
7-20
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VLT HVAC Drive Design Guide
Bit 09, Selection of ramp 1/2:
Bit 09 = "0": Ramp 1 is active (3-41 Ramp 1 Ramp Up Time
to 3-42 Ramp 1 Ramp Down Time). Bit 09 = "1": Ramp 2
(3-51 Ramp 2 Ramp Up Time to 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.
Bit 11, Relay 01:
Bit 11 = "0": Relay not activated. Bit 11 = "1": Relay 01
activated provided that Control word bit 11 is chosen in
5-40 Function Relay.
Bit 12, Relay 04:
Bit 12 = "0": Relay 04 is not activated. Bit 12 = "1": Relay 04
is activated provided that Control word bit 12 is chosen in
5-40 Function Relay.
Bit 13/14, Selection of set-up:
Use bits 13 and 14 to choose from the four menu set-ups
according to the table shown.
Table 7.35
The function is only possible when Multi Set-ups is selected
in 0-10 Active Set-up.
Make a selection in 8-55 Set-up Select to define how Bit
13/14 gates with the corresponding function on the digital
inputs.
Bit 15 Reverse:
Bit 15 = '0': No reversing. Bit 15 = '1': Reversing. In the
default setting, reversing is set to digital in 8-54 Reversing
Select. Bit 15 causes reversing only when Ser. communi-
cation, Logic or or Logic and is selected.
MG11BB22 - VLT ® is a registered Danfoss trademark
Set-up Bit 14
1 0
2 0
3 1
4 1
Bit 13
0
1
0
1