NB!
When the frequency converter is at the torque limit and has received a stop command, it may
not stop by itself. To ensure that the frequency converter stops, configure a digital output to
Torque limit & stop
[27] and connect this digital output to a digital input that is configured
as coast.
[8]
Start
(Default Digital input 18): Select start for a start/stop command. Logic ‘1’ = start, logic ‘0’ = stop.
[9]
Latched start
The motor starts, if a pulse is applied for min. 2 ms. The motor stops when Stop inverse is activated.
[10]
Reversing
(Default Digital input 19). Change the direction of motor shaft rotation. Select Logic ‘1’ to reverse. The reversing
signal only changes the direction of rotation. It does not activate the start function. Select both directions in
par. 4-10
Motor Speed Direction
. The function is not active in process closed loop.
[11]
Start reversing
Used for start/stop and for reversing on the same wire. Signals on start are not allowed at the same time.
[12]
Enable start forward
Rotates motor shaft clockwise at start.
[13]
Enable start reverse
Rotates motor shaft counterclockwise at start.
[14]
Jog
(Default Digital input 29): Use to activate jog speed. See par. 3-11.
[15]
Preset reference on
Shifts between external reference and preset reference. It is assumed that
External/preset
[1] has been selected
in par. 3-04. Logic '0' = external reference active; logic '1' = one of the eight preset references is active.
[16]
Preset ref bit 0
Preset ref. bit 0,1, and 2 enables a choice between one of the eight preset references according to the table
below.
[17]
Preset ref bit 1
Same as Preset ref bit 0 [16].
[18]
Preset ref bit 2
Same as Preset ref bit 0 [16].
Preset ref. bit
2
1
0
Preset ref. 0
0
0
0
Preset ref. 1
0
0
1
Preset ref. 2
0
1
0
Preset ref. 3
0
1
1
Preset ref. 4
1
0
0
Preset ref. 5
1
0
1
Preset ref. 6
1
1
0
Preset ref. 7
1
1
1
[19]
Freeze ref
Freezes the actual reference, which is now the point of enable/condition for Speed up and Speed down to be
used. If Speed up/down is used, the speed change always follows ramp 2 (par. 3-51 and 3-52) in the range 0
- par. 3-03
Maximum Reference
.
[20]
Freeze output
Freezes the actual motor frequency (Hz), which is now the point of enable/condition for Speed up and Speed
down to be used. If Speed up/down is used, the speed change always follows ramp 2 (par. 3-51 and 3-52) in
the range 0 - par. 1-23
Motor Frequency
.
NB!
When Freeze output is active, the frequency converter cannot be stopped via a low ‘start [8]’
signal. Stop the frequency converter via a terminal programmed for Coasting inverse [2] or
Coast and reset, inverse.
[21]
Speed up
Select Speed up and Speed down if digital control of the up/down speed is desired (motor potentiometer).
Activate this function by selecting either Freeze reference or Freeze output. When Speed up/ down is activated
for less than 400 msec. the resulting reference will be increased/ decreased by 0.1 %. If Speed up/ down is
activated for more than 400 msec. the resulting reference will follow the setting in ramping up/ down parameter
3-x1/ 3-x2.
Shut down
Catch up
Unchanged speed
0
0
Reduced by %-value
1
0
Increased by %-value
0
1
Reduced by %-value
1
1
[22]
Speed down
Same as Speed up [21].
2. How to Programme
FC 300 Programming Guide
82
MG.33.M3.02 - VLT
®
is a registered Danfoss trademark
2
