Danfoss VLT FC 103 Programming Manual page 62

Parameter Description
[10] Reversing Changes 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
4-10 Motor Speed Direction.
(Default Digital input 19).
[11] Start reversing Used for start/stop and for reversing on the
same wire. Signals on start are not allowed
at the same time.
[14] Jog Used for activating jog speed. See 3-11 Jog
Speed [Hz].
(Default Digital input 29)
[15] Preset Used for shifting between external
reference on reference and preset reference. It is
assumed that External/preset [1] has been
selected in 3-04 Reference Function. Logic '0'
= external reference active; logic '1' = one
of the eight preset references is active.
[16] Preset ref bit Enables a choice between one of the eight
0 preset references according to the table
below.
[17] Preset ref bit Enables a choice between one of the eight
1 preset references according to the table
below.
[18] Preset ref bit Enables a choice between one of the eight
2 preset references according to Table 3.10.
Preset ref. bit
Preset ref. 0
Preset ref. 1
Preset ref. 2
Preset ref. 3
Preset ref. 4
Preset ref. 5
Preset ref. 6
Preset ref. 7
Table 3.10
[19] Freeze ref Freezes actual reference. The frozen
reference 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
(3-51 Ramp 2 Ramp Up Time and 3-52 Ramp
2 Ramp Down Time) in the range 0 -
3-03 Maximum Reference.
[20] Freeze output Freezes actual motor frequency (Hz). The
frozen motor frequency 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 (3-51 Ramp 2 Ramp Up Time and
3-52 Ramp 2 Ramp Down Time) in the range
0 - 1-23 Motor Frequency.
®
VLT Refrigeration Drive Programming Guide
[21] Speed up
[22] Speed down
[23] Set-up select
[24] Set-up select
[34] Ramp bit 0
[37] Fire mode
2 1 0
0 0 0
[39] Day/ Night
0 0 1
0 1 0
0 1 1
1 0 0
[52] Run
1 0 1
1 1 0
1 1 1
[53] Hand start
®
MG16H102 - VLT is a registered Danfoss trademark
NOTE
When Freeze output is active, the
frequency converter cannot be stopped
via a low 'start [13]' signal. Stop the
frequency converter via a terminal
programmed for [2] Coast inverse or [3]
Coast and reset, inv.
For 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
is activated for less than 400 ms the
resulting reference will be increased by 0.1
%. If Speed up is activated for more than
400 ms the resulting reference will ramp
according to Ramp 1 in 3-41 Ramp 1 Ramp
Up Time.
Same as [21] Speed up.
Selects one of the four set-ups. Set
bit 0 0-10 Active Set-up to Multi Set-up.
Same as [23] Set-up select bit 0.
bit 1 (Default Digital input 32)
Select which ramp to use. Logic "0" will
select ramp 1 while logic "1" will select
ramp 2.
A signal applied will put the frequency
converter into Fire Mode and all other
commands will be disregarded. See 24-0*
Fire Mode.
Day or night indication for Day-Night
Control control feature. A low voltage on the
selected digital input indicates day, while
high voltage indicates night.
The input terminal, for which the Run
Permissive permissive has been programmed must be
logic "1" before a start command can be
accepted. Run permissive has a logic 'AND'
function related to the terminal which is
programmed for [8] Start, [14] Jog or [20]
Freeze Output, which means that in order to
start running the motor, both conditions
must be fulfilled. If Run Permissive is
programmed on multiple terminals, Run
permissive needs only be logic '1' on one of
the terminals for the function to be carried
out. The digital output signal for Run
Request ([8] Start, [14] Jog or [20] Freeze
output) programmed in parameter group
5-3* Digital outputs, or parameter group
5-4* Relays, will not be affected by Run
Permissive.
A signal applied will put the frequency
converter into Hand mode as if [Hand On]
on the LCP has been pressed and a normal
stop command will be overridden. If discon-
necting the signal, the motor will stop. To
make any other start commands valid,
3 3
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