Specifications

Programmed
ref. value
Parameter Bit
01
Bit
00
1
3-10 Preset Reference [0]
0 0
2
3-10 Preset Reference [1]
0 1
3
3-10 Preset Reference [2]
1 0
4
3-10 Preset Reference [3]
1 1
Table 7.34 Control Bits
NOTICE
Make a selection in 8-56 Preset Reference Select to define
how Bit 00/01 gates with the corresponding function on
the digital inputs.
Bit 02, DC brake
Bit 02=’0’ leads to DC braking and stop. Set braking
current and duration in 2-01 DC Brake Current and 2-02 DC
Braking Time.
Bit 02=’1’ leads to ramping.
Bit 03, Coasting
Bit 03=’0’: The frequency converter immediately "lets go"
of the motor, (the output transistors are "shut off") and it
coasts to a standstill.
Bit 03=’1’: The frequency converter 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
Bit 05=’0’: The present output frequency (in Hz) freezes.
Change the frozen output frequency only with the digital
inputs (5-10 Terminal 18 Digital Input to 5-13 Terminal 29
Digital Input) programmed to Speed up=21 and Slow
down=22.
NOTICE
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 (5-10 Terminal 18 Digital Input to
5-13 Terminal 29 Digital Input) programmed to
DC braking=5, Coasting stop=2, or Reset and
coasting stop=3.
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 Frequency converter 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 signal’s
leading edge, that is, when changing from logic ’0’ to
logic ’1’.
Bit 08, Jog
Bit 08=’1’: The output frequency is determined by 3-11 Jog
Speed [Hz].
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 frequency converter 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 telegram always contains the control
word, regardless of the telegram type. Turn off the control
word if not wanting 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=36 is chosen in 5-40 Function Relay.
Bit 12, Relay 02
Bit 12="0": Relay 02 is not activated.
Bit 12="1": Relay 02 is activated provided that Control word
bit 12=37 is chosen in 5-40 Function Relay.
Bit 13, Selection of set-up
Use bit 13 to select from the 2 menu set-ups according to
Table 7.36.
Set-up Bit 13
1 0
2 1
The function is only possible when Multi Set-Ups=9 is
selected in 0-10 Active Set-up.
Make a selection in 8-55 Set-up Select to define how Bit 13
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 Serial communication, Logic or Logic and is
selected.
RS-485 Installation and Set...
VLT
®
HVAC Basic Drive FC 101 Design Guide
MG18C502 - Rev. 2013-09-06 95
7 7